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Chapter: 8 -Problem: 24 >> Listing 8.4 checks whether a solution is valid by checking whether every number is valid in the board. Rewrite the program by checking whether every row, every column, and every small box has the numbers 1 to 9. Listing Transcribed Image Text: 1 import java.util.Scanner; 2 3 public class CheckSudo
Answer Preview: Program Plan Create readSolution method so that reads the solution from the user input and returns t…

, Chapter: 28 -Problem: 8 >> Recall that a graph is bipartite if its vertices can be divided into two disjoint sets such that no edges exist between vertices in the same set. Add a new method in AbstractGraph with the following header to detect whether the graph is bipartite: public boolean isBipartite();
Answer Preview: Refer to the code provided in the listing 28 2 28 3 and 28 4 of chapter 28 in the text book isBipartite method definition The following code defines a method isBipartite which checks if a graph is bip…

, Chapter: 32 -Problem: 3 >> Develop a subclass of BorderPanenamed DBConnectionPane that enables the user to select or enter a JDBC driver and a URL and to enter a username and password, as shown in Figure 32.28. When the Connect to DB button is clicked, a Connection object for the database is stored in the connection property. You can then use the getConnection() method to return the connection.
Answer Preview: Program Plan Create a class DBConnectionPane which extends to BorderPane Create dropdown menu using ComboBox class for getting URL and JDBC driver from user Create a TextField inputUsername to get use…

, Chapter: 5 -Problem: 15 >> Write a program that prints the characters in the ASCII character table from ! to ~. Display ten characters per line. The ASCII table is shown in Appendix B. Characters are separated by exactly one space. Transcribed Image Text: nul soh stx etx cot eng ack bel bs ht nl er so dle del de2 de3 de4 nak
Answer Preview: Program plan Use for loop repeat characters from 1 to Display ten characters per …

, Chapter: 29 -Problem: 15 >> Write a program that lets the users create a weighted graph dynamically. The user can create a vertex by entering its name and location, as shown in Figure 29.27. The user can also create an edge to connect two vertices. To simplify the program, assume that vertex names are the same as vertex indices. You have to add the vertex indices 0, 1, . . ., and n, in this order. The user can specify two ve
Answer Preview: Program Plan Create a class DisplayGraph that extends Application class Create three text field one for insertion of vertex name second for x coordinate and third for y coordinate Create one Add Verte…

, Chapter: 3 -Problem: 5 >> Write a program that prompts the user to enter an integer for today?s day of the week (Sunday is 0, Monday is 1, ?, and Saturday is 6). Also prompt the user to enter the number of days after today for a future day and display the future day of the week. Here is a sample run: Transcribed Image Text:
Answer Preview: Program Plan Prompt the user to enter todays day Prompt the user to enter the number of days elapsed …

, Chapter: 8 -Problem: 7 >> Listing 8.3 gives a program that finds two points in a two-dimensional space nearest to each other. Revise the program so that it finds two points in a three-dimensional space nearest to each other. Use a two-dimensional array to represent the points. Test the program using the following points:double[][] points = {{-1, 0, 3}, {-1, -1, -1}, {4, 1, 1}, {2, 0.5, 9}, {3.5, 2, -1}, {3, 1.5, 3}, {-1.5,
Answer Preview: Java program for Points nearest to each other Comp…

, Chapter: 28 -Problem: 19 >> Modify GraphView in Listing 28.6 to add a new data field tree with a set method. The edges in the tree are displayed in red. Write a program that displays the graph in Figure 28.1 and the DFS/BFS tree starting from a specified city, as shown in Figures 28.13 and 28.16. If a city not in the map is entered, the program displays an error message in the label. Listing
Answer Preview: Program Plan Create a class ViewDfsBfs that extends Application class Start method is used to set the stage and display it to the user setOnAction method in Button class is called every time user clic…

, Chapter: 30 -Problem: 20 >> Modify Programming Exercise 22.21 to display the intermediate results of the search. Figure 30.32 gives a snapshot of an animation in progress with number 2 placed in the cell in Figure 30.32a, number 3 placed in the cell in Figure 30.32b, and number 3 placed in the cell in Figure 30.32c. The animation displays all the search steps.
Answer Preview: Progra m Plan Create a class sudokuAnimated In class sudokuAnimated Create 2D array myCells of type TextField Create 2D array myGrid of type int Create buttons solveButton and clearButton of type Butt…

, Chapter: 1 -Problem: 2 >> Write a program that displays Welcome to Java five times.
Answer Preview: OUTPUT Welcome to Jave Welcome to Jave …

, Chapter: 9 -Problem: 8 >> Design a class named Fan to represent a fan. The class contains: ? Three constants named SLOW, MEDIUM, and FAST with the values 1, 2, and 3 to denote the fan speed. ? A private int data field named speed that specifies the speed of the fan (the default is SLOW). ? A private boolean data field named on that specifies whether the fan is on (the default is false). ? A private double data field named 
Answer Preview: Output FAN 1 Speed 3 Color yellow Radius 100 F…

, Chapter: 31 -Problem: 10 >> Write a program that enables any number of clients to chat. Implement one server that serves all the clients, as shown in Figure 31.22. Name the client Exercise31_10Client and the server Exercise31_10Server. Transcribed Image Text: Multi ThreadServer started at Mon Jun 10 21:45:21 EDT 2013 Connectio
Answer Preview: Program Plan Create a public class Exercise31 10Server which is the server side implementation of multiple client chat application Override start Stage ps method of Application class which create the …

, Chapter: 20 -Problem: 9 >> Modify Listing 20.6, MultipleBallApp.java to assign a random radius between 2 and 20 when a ball is created. When the - button is clicked, one of largest balls is removed. Listing Transcribed Image Text: 1 import javafx.animation.KeyFrame; 2 import javafx.animation.Timeline; 3 import javafx.appli
Answer Preview: Program Plan Step 1 The java program creates the two priority queues these queues are …

, Chapter: 3 -Problem: 9 >> An ISBN-10 (International Standard Book Number) consists of 10 digits: d1d2d3d4d5d6d7d8d9d10. The last digit, d10, is a checksum, which is calculated from the other nine digits using the following formula: (d1 ? 1 + d2 ? 2 + d3 ? 3 + d4 ? 4 + d5 ? 5 + d6 ? 6 + d7 ? 7 + d8 ? 8 + d9 ? 9) % 11 If the checksum is 10, the last digit is denoted as X according to the ISBN-10 convention. Write a program t
Answer Preview: Program plan Prompt the user to enter the first 9 digits of an ISBN 10 as integer Find the first 9 i…

, Chapter: 8 -Problem: 28 >> The two-dimensional arrays m1 and m2 are strictly identical if their corresponding elements are equal. Write a method that returns true if m1 and m2 are strictly identical, using the following header:public static boolean?equals(int[][] m1,?int[][] m2)Write a test program that prompts the user to enter two 3 ? 3 arrays of integers and displays whether the two are strictly identical. Here are the s
Answer Preview: Program plan Create equals method so that accepts two twodimensional arrays as arguments and then re…

, Chapter: 33 -Problem: 3 >> Write a JSF page to let the user enter taxable income and filing status, as shown in Figure 33.27a. Clicking the Compute Tax button computes and displays the tax, as shown in Figure 33.27b. Use the computeTax method introduced in Listing 3.5, ComputeTax.java, to compute tax. Listing Transcribed Image Text:
Answer Preview: Program Plan Now create an index xhtml file in the WEB INF folder in which write all the xhtml code for the GUI In which set the title of web page Set the heading as shown in the textbook Create Label…

, Chapter: 30 -Problem: 5 >> Rewrite Exercise using a thread to control the fan animation. Write a program that displays a running fan, as shown in Figure. Use the?Pause,?Resume,?Reverse?buttons to pause, resume, and reverse fan running. (c) The program simulates a fan running. Transcribed Image Text: Exercise15_28 Reverse Res
Answer Preview: Program Plan Create a class MyFan which inherits Application class Override the start method of Application class Create the Hbox BorderPane and Scene and add them to the application window Add button…

, Chapter: 3 -Problem: 3 >> A linear equation can be solved using Cramer?s rule given in Programming Exercise 1.13. Write a program that prompts the user to enter a, b, c, d, e, and f and displays the result. If ad - bc is 0, report that ?The equation has no solution.? Transcribed Image Text: Enter a, b, c, d, e, f: 9.0 4.0 3
Answer Preview: Program Plan Create the class called LinearEquSolver Initialize the main method with a Scanner class …

, Chapter: 8 -Problem: 10 >> Write a program that randomly fills in 0s and 1s into a 4-by-4 matrix, prints the matrix, and finds the first row and column with the most 1s. Here is a sample run of the program: 0011 0011 1101 1010 The largest row index: 2 The largest column index: 2
Answer Preview: Program plan Create largestRowOnes method so that accepts a matrix as argument then finds and return…

, Chapter: 28 -Problem: 15 >> Rewrite Programming Exercise 28.14 to enable the user to set an initial pattern of the 4 * 4 16 tails problem (see Figure 28.23a). The user can click the Solve button to display the solution, as shown in Figure 28.23b. Initially, the user can click the mouse button to flip a coin. If a solution does not exist, display a message to report it. The nine tails problem in the text uses a 3 ? 3 matrix.
Answer Preview: Program Plan start method is used to initialize various things such as creating boxes setting alignment and setting scene on the stage etc setOnAction method is used to listen for every mouse click on …

, Chapter: 30 -Problem: 12 >> Implement the following method using the Fork/Join Framework to assign random values to the list. public static void parallelAssignValues(double[] list) Write a test program that creates a list with 9,000,000 elements and invokes parallelAssignValues to assign random values to the list. Also implement a sequential algorithm and compare the execution time of the two. Note that if you use Math.rando
Answer Preview: Program Plan Find the starting time ending time with using currentTimeMillis 0 Calculate the sequent…

, Chapter: 8 -Problem: 8 >> Revise Listing 8.3, FindNearestPoints.java, to display all closest pairs of points with the same minimum distance. Here is a sample run: Listing Transcribed Image Text: Enter the number of points: 8-Enter Enter 8 points: 0 0 1 1 -1 -1 2 2 -2 -2 -3 -3 -4 -4 5 5 -Enter The closest two points are (0
Answer Preview: Java program for 11 closest pairs of points Compile Find EqualDistancePointsjav…

, Chapter: 32 -Problem: 1 >> Write a program that views, inserts, and updates staff information stored in a database, as shown in Figure 32.27a. The View button displays a record with a specified ID. The Insert button inserts a new record. The Update button updates the record for the specified ID. The Staff table is created as follows: Transcribed Im
Answer Preview: Program Plan Create a user named scott and set its password to tiger in mysql Create a database named javabook using the user scott Create a new table in javabook named Staff and set its columns and t…

, Chapter: 29 -Problem: 16 >> Write a program that lets the user create a weighted graph dynamically. The user can create a vertex by entering its name and location, as shown in Figure 29.28. The user can also create an edge to connect two vertices. To simplify the program, assume that vertex names are the same as those of vertex indices. You have to add the vertex indices 0, 1, . . ., and n, in this order. The edges in the MS
Answer Preview: Program Plan Create a class DisplayDynamicMST that extends Application class Create three text field one for insertion of vertex name second for x coordinate and third for y coordinate Create one Add …

, Chapter: 3 -Problem: 11 >> Write a program that prompts the user to enter the month and year and displays the number of days in the month. For example, if the user entered month 2 and year 2012, the program should display that February 2012 had 29 days. If the user entered month 3 and year 2015, the program should display that March 2015 had 31 days.
Answer Preview: Number of days in a month Program plan Prompt the user to enter month and year Finding number of day…

, Chapter: 8 -Problem: 30 >> Write a method that solves the following 2 ? 2 system of linear equations: The method header ispublic static double[] linearEquation(double[][] a,?double[] b)The method returns null if a00a11 - a01a10 is 0. Write a test program that prompts the user to enter a00, a01, a10, a11, b0, and b1, and displays the result. If a00a11 - a01a10 is 0, report that ?The equation has no solution.? A sample run is
Answer Preview: Program Plan 1 Create a class LinearEquation 2 Read values for a00a01a10a11 and populate twodimensio…

, Chapter: 16 -Problem: 29 >> Write a program that displays the calendar for the current month. You can use the Prior and Next buttons to show the calendar of the previous or next month. Display the dates in the current month in black and display the dates in the previous month and next month in gray, as shown in Figure 16.48. Transcribed Image Text:
Answer Preview: Program plan Import the required packages into the program Create a class DisplayACalendar to genera…

, Chapter: 10 -Problem: 8 >> Programming Exercise 8.12 writes a program for computing taxes using arrays. Design a class named Tax to contain the following instance data fields: For each filling status, there are six tax rates Each rate is applied to a certain amount of taxable income. For example, from the taxable income of $400,000 for a single filer, $8,350 is taxed at 10%, (33,950 - 8,350) at 15%, (82,250 - 33,950) at 25%
Answer Preview: Program Plan 1 Create a class Tax 2 Declare the variables Int filingStatus Filing status public static final int SINGLEFILER 0 Single filer public sta…

, Chapter: 20 -Problem: 17 >> This exercise is a variation of the 24-point card game described in Programming Exercise 20.13. Write a program to check whether there is a 24-point solution for the four specified numbers. The program lets the user enter four values, each between 1 and 13, as shown in Figure 20.21. The user can then click the Solve button to display the solution or display ?No solution? if none exist. The 24-poi
Answer Preview: Program Plan Create a class CardGame24PointCal which extends Application class Create static class PointCardGamePane which extends GridPane PointCardGamePaneint size int gamePointVar is a parameterize…

, Chapter: 12 -Problem: 26 >> Write a program that prompts the user to enter a directory name and creates a directory using the File’s mkdirs method. The program displays the message “Directory created successfully” if a directory is created or “Directory already exists” if the directory already exists.
Answer Preview: Program plan Import the required packages into the program Create a class Exercise 1426 to create a …

, Chapter: 5 -Problem: 21 >> Write a program that lets the user enter the loan amount and loan period in number of years and displays the monthly and total payments for each interest rate starting from 5% to 8%, with an increment of 1/8. Here is a sample run: For the formula to compute monthly payment, see Listing 2.9, ComputeLoan.java. Transcribed
Answer Preview: Program plan Crate class called ComputeLoan Declare variables of type double loanAmount …

, Chapter: 16 -Problem: 14 >> Write a program that can dynamically change the font of a text in a label displayed on a stack pane. The text can be displayed in bold and italic at the same time. You can select the font name or font size from combo boxes, as shown in Figure 16.42a. The available font names can be obtained using Font.getFamilies(). The combo box for the font size is initialized with numbers from 1 to 100.
Answer Preview: Program Plan Define the class SelectAFont which extends Application o Define the objects of Text Com…

, Chapter: 12 -Problem: 19 >> Write a program that counts the number of words in PresidentAbraham Lincoln’s Gettysburg address from http://cs.armstrong.edu/liang/data/ Lincoln.txt.
Answer Preview: Program plan Import the required packages into the program Declare the required variables and initia…

, Chapter: 2 -Problem: 8 >> Listing 2.7, ShowCurrentTime.java, gives a program that displays the current time in GMT. Revise the program so that it prompts the user to enter the time zone offset to GMT and displays the time in the specified time zone. Here is a sample run: Enter the time zone offset to GMT: ?5 The current time is 4:50:34 Transcribed
Answer Preview: Output 5Enter the time zone offset to GMT Current time is 8376 GMT The Java program takes offset to …

, Chapter: 5 -Problem: 17 >> Write a program that prompts the user to enter an integer from 1 to 15 and displays a pyramid, as shown in the following sample run: Transcribed Image Text: Enter the number of lines: 7 JEnter 1. 2 1 2 3. 3. 4 4 4 4 4 1. 1. 1. 2 4 7 6 5 6 7 2
Answer Preview: Program Plan Create the class Pyramid o Define the main method Prompt the user to enter the …

, Chapter: 29 -Problem: 1 >> The text introduced Prim’s algorithm for finding a minimum spanning tree. Kruskal’s algorithm is another well-known algorithm for finding a minimum spanning tree. The algorithm repeatedly finds a minimumweight edge and adds it to the tree if it does not cause a cycle. The process ends when all vertices are in the tree. Design and implement an algorithm for finding an MST using Kruskal’s algorithm.
Answer Preview: Program Plan Create a class Kruskal Create an inner class edge to store the source destination and t…

, Chapter: 10 -Problem: 20 >> Programming Exercise 5.26 approximates e using the following series: In order to get better precision, use BigDecimal with 25 digits of precision in the computation. Write a program that displays the e value for i = 100, 200, . . ., and 1000. Transcribed Image Text: e = 1 + 1! i! 2! 3! 4!
Answer Preview: Program plan Initialise the value of e i and a variable factValue with 1 Divide factValue with i and …

, Chapter: 1 -Problem: 1 >> Write a program that displays Welcome to Java, Welcome to Computer Science, and Programming is fun.
Answer Preview: Welcome to Jave Welcome to Computer Science Programming i…

, Chapter: 8 -Problem: 14 >> Write a program that prompts the user to enter the length of a square matrix, randomly fills in 0s and 1s into the matrix, prints the matrix, and finds the rows, columns, and diagonals with all 0s or 1s. Here is a sample run of the program: Transcribed Image Text: Enter the size for the matrix: 4 01
Answer Preview: Program to display the square matrix with randomly filled 0s and 1s Program plan Import the required packages into the program o Define the main function Create an object using scanner class Get the i…

, Chapter: 30 -Problem: 1 >> Rewrite Listing 30.1 to display the output in a text area, as shown in Figure 30.30. Listing Transcribed Image Text: a 1b2b3b 4b 5 b6bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb 7 8bbbbbbbbbbbbbbbbbbbb 9bb10 16 11 12 13 14 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Answer Preview: Program Plan Create PrintChar class so that prints a specified character a or b 100 times in a te…

, Chapter: 11 -Problem: 14 >> Write a method that returns the union of two array lists of integers using the following header:public static?ArrayList union(ArrayList list1, ArrayList list2)For example, the union of two array lists {2, 3, 1, 5} and {3, 4, 6} is {2, 3, 1, 5, 3, 4, 6}. Write a test program that prompts the user to enter two lists, each with five integers, and displays their union. The numbers are separated by exa
Answer Preview: Program Plan 1 Create a class CombineArrayLists 2 Declare and initialize the variable ArrayList firs…

, Chapter: 2 -Problem: 6 >> Write a program that reads an integer between 0 and 1000 and adds all the digits in the integer. For example, if an integer is 932, the sum of all its digits is 14.Use the % operator to extract digits, and use the / operator to remove the extracted digit. For instance, 932 % 10 = 2 and 932 / 10 = 93.Here is a sample run:Enter a number between 0 and 1000: 999The sum of the digits is 27
Answer Preview: Program Plan Create a class called SumOfDigits Prompt and read a number from the console Calculate t…

, Chapter: 7 -Problem: 5 >> Write a program that reads in ten numbers and displays the number of distinct numbers and the distinct numbers separated by exactly one space (i.e., if a number appears multiple times, it is displayed only once). Transcribed Image Text: J Enter Enter ten numbers: 1 2 3 2 1 6 3 4 5 2 The number of
Answer Preview: Program Plan Define the class name PrintDistinctNumbers o Define the main method Declare the re…

, Chapter: 21 -Problem: 14 >> Rewrite Listing 12.18, WebCrawler.java, to improve the performance by using appropriate new data structures for listOfPendingURLs and listofTraversedURLs. Suppose you have Java source files under the directories?chapter1,?chapter2, . . . ,?chapter34. Write a program to insert the statement?package chapteri;?as the first line for each Java source file under the directory?chapteri. Suppose?chapter1
Answer Preview: Program Plan Create a class WebCrawlerRev which is the revised version of WebCrawler class in listing 1218 This classes uses data structures like LinkedList and HashSet to improve the performance of t…

, Chapter: 6 -Problem: 29 >> Twin primes are a pair of prime numbers that differ by 2. For example, 3 and 5 are twin primes, 5 and 7 are twin primes, and 11 and 13 are twin primes. Write a program to find all twin primes less than 1,000. Display the output as follows: (3, 5) (5, 7)
Answer Preview: Java program for Twin prime program Define …

, Chapter: 12 -Problem: 20 >> Suppose you have Java source files under the directories chapter1, chapter2, . . . , chapter34. Write a program to remove the statement package chapteri; in the first line for each Java source file under the directory chapteri. Suppose chapter1, chapter2, . . . , chapter34 are under the root directory srcRootDirectory. The root directory and chapteri directory may contain other folders and files.
Answer Preview: Program plan Import the required packages into the program Declare the required variables Get the file input path from the user as the command line ar…

, Chapter: 7 -Problem: 1 >> Write a program that reads student scores, gets the best score, and then assigns grades based on the following scheme:Grade is A if score is ? best - 10Grade is B if score is ? best - 20;Grade is C if score is ? best - 30;Grade is D if score is ? best - 40;Grade is F otherwise.The program prompts the user to enter the total number of students, then prompts the user to enter all of the scores, and
Answer Preview: Program plan Prompt the user to enter the number of students Create an array of type int to store th…

, Chapter: 5 -Problem: 44 >> A short value is stored in 16 bits. Write a program that prompts the user to enter a short integer and displays the 16 bits for the integer. Here are sample runs: Transcribed Image Text: Enter an integer: 5 JEnter The bits are 0000000000000101 Enter an integer: -5 J Enter The bits are 111111111111
Answer Preview: Output Enter an integer 5 The 16 bits are 000000000101 Computer archi…

, Chapter: 13 -Problem: 19 >> Write a program that prompts the user to enter a decimal number and displays the number in a fraction. Listing Transcribed Image Text: JEnter Enter a decimal number: 3.25 The fraction number is 13/4 JEnter Enter a decimal number: -0.45452 The fraction number is -11363/25000
Answer Preview: Program Plan 1 Create a class Rational 2 Declare and Initialize the private members numerator and de…

, Chapter: 3 -Problem: 15 >> Revise Listing 3.8, Lottery.java, to generate a lottery of a threedigit number. The program prompts the user to enter a three-digit number and determines whether the user wins according to the following rules: Listing 3.8 1. If the user input matches the lottery number in the exact order, the award is $10,000. 2. If all digits in the user input match all digits in the lottery number, the award i
Answer Preview: Output Enter your lottery pick 630 Match one digit you win 1000 To generate a lottery of 3 digit num…

, Chapter: 5 -Problem: 29 >> Write a program that prompts the user to enter the year and first day of the year and displays the calendar table for the year on the console. For example, if the user entered the year 2013, and 2 for Tuesday, January 1, 2013, your program should display the calendar for each month in the year, as follows: Transcribed Im
Answer Preview: Program plan Create a class called CalenderDemo Read an integer day of the year Read on inte…

, Chapter: 20 -Problem: 13 >> The 24-point game is to pick any 4 cards from 52 cards, as shown in Figure 20.19. The Jokers are excluded. Each card represents a number. An Ace, King, Queen, and Jack represent 1, 13, 12, and 11, respectively. You can click the Shuffle button to get four new cards. Enter an expression that uses the four numbers from the four selected cards. Each number must be used once and only once. You can use
Answer Preview: Program Plan Create a class CardGame24Point which extends Application class Create functions setCardsAtRandomHBox hboxPane isOperatorchar ch isArithmeticOperatorchar ch separateExpString s isCorrectSt…

, Chapter: 6 -Problem: 8 >> Write a class that contains the following two methods: /** Convert from Celsius to Fahrenheit */ public static double celsiusToFahrenheit(double celsius) /** Convert from Fahrenheit to Celsius */ public static double fahrenheitToCelsius(double fahrenheit) The formula for the conversion is:fahrenheit = (9.0 / 5) * celsius + 32celsius = (5.0 / 9) * (fahrenheit ? 32) Write a test program that invokes
Answer Preview: Program plan Step 1 Create a test class called Tem…

, Chapter: 10 -Problem: 25 >> The split method in the String class returns an array of strings consisting of the substrings split by the delimiters. However, the delimiters are not returned. Implement the following new method that returns an array of strings consisting of the substrings split by the matching delimiters, including the matching delimiters. public static String[] split(String s, String regex) For example, split("
Answer Preview: Program Plan Define a class SplitMethodDemo o Define a static method that takes two String arguments …

, Chapter: 2 -Problem: 9 >> Average acceleration is defined as the change of velocity divided by the time taken to make the change, as shown in the following formula: Write a program that prompts the user to enter the starting velocity v0 in meters/second, the ending velocity v1 in meters/second, and the time span t in seconds, and displays the average acceleration. Here is a sample run: Enter v0, v1, and t: 5.5 50.9 4.5The
Answer Preview: Output Enter v0 v1 and 55 509 45 The average acceleration is 10…

, Chapter: 7 -Problem: 35 >> Write a hangman game that randomly generates a word and prompts the user to guess one letter at a time, as shown in the sample run. Each letter in the word is displayed as an asterisk. When the user makes a correct guess, the actual letter is then displayed. When the user finishes a word, display the number of misses and ask the user whether to continue to play with another word. Declare an array
Answer Preview: Program Plan Import the required classes Create the class called Hangman o Start the main method of …

, Chapter: 21 -Problem: 6 >> Write a program that reads an unspecified number of integers and finds the one that has the most occurrences. The input ends when the input is 0. For example, if you entered 2 3 40 3 5 4 –3 3 3 2 0, the number 3 occurred most often. If not one but several numbers have the most occurrences, all of them should be reported. For example, since 9 and 3 appear twice in the list 9 30 3 9 3 2 4, both occu
Answer Preview: Output Enter the integers 3 5 4 3 3 3 2 0 The most occurrence number 3 This number overall 3 …

, Chapter: 5 -Problem: 32 >> Revise Listing 3.8, Lottery.java, to generate a lottery of a twodigit number. The two digits in the number are distinct.? Listing 3.8 Transcribed Image Text: 1 import java.util.Scanner; 2 3 public class Lottery { public static void main(String[] args) { 4 // Generate a lottery number 5 int lottery
Answer Preview: Output 80 81 82 83 84 85 86 87 88 89 Program that finds lottery Compile Javac Lotteryj…

, Chapter: 14 -Problem: 12 >> Write a program that uses a bar chart to display the percentages of the overall grade represented by projects, quizzes, midterm exams, and the final exam, as shown in Figure 14.46b. Suppose that projects take 20 percent and are displayed in red, quizzes take 10 percent and are displayed in blue, midterm exams take 30 percent and are displayed in green, and the final exam takes 40 percent and is di
Answer Preview: Program Plan Define the class name Barchart with xaxis as category axis and yax…

, Chapter: 3 -Problem: 20 >> Programming Exercise 2.17 gives a formula to compute the wind-chill temperature. The formula is valid for temperatures in the range between ?58?F and 41?F and wind speed greater than or equal to 2. Write a program that prompts the user to enter a temperature and a wind speed. The program displays the wind-chill temperature if the input is valid; otherwise, it displays a message indicating whether
Answer Preview: Program Plan The objective of the program is to generate the wind chill index using the inputs tempe…

, Chapter: 7 -Problem: 22 >> The classic Eight Queens puzzle is to place eight queens on a chessboard such that no two queens can attack each other (i.e., no two queens are on the same row, same column, or same diagonal). There are many possible solutions. Write a program that displays one such solution. A sample output is shown below: Transcribed Ima
Answer Preview: Program Plan Declare the class Queen8 In main method call the method enumeratel with the argument 8 …

, Chapter: 16 -Problem: 21 >> Write a program that allows the user to enter time in seconds in the text field and press the Enter key to count down the seconds, as shown in Figure 16.45d. The remaining seconds are redisplayed every one second. When the seconds are expired, the program starts to play music continuously. Transcribed Image Text:
Answer Preview: Program Plan The program takes the value from the user as an integer and then initiates the timer th…

, Chapter: 6 -Problem: 9 >> Write a class that contains the following two methods:/** Convert from feet to meters */public static double?footToMeter(double?foot)/** Convert from meters to feet */public static double?meterToFoot(double?meter) The formula for the conversion is:meter = 0.305 * footfoot = 3.279 * meterWrite a test program that invokes these methods to display the following tables:
Answer Preview: Program plan Step 1 Create test class called LengthConversions Step 2 Declare varia…

, Chapter: 8 -Problem: 35 >> Given a square matrix with the elements 0 or 1, write a program to find a maximum square submatrix whose elements are all 1s. Your program should prompt the user to enter the number of rows in the matrix. The program then displays the location of the first element in the maximum square submatrix and the number of the rows in the submatrix. Here is a sample run: Your program should implement and us
Answer Preview: Largest Block Program plan Define a method getLargestBlock that will take the matrix ax input and gi…

, Chapter: 8 -Problem: 22 >> Write a program that generates a 6-by-6 two-dimensional matrix filled with 0s and 1s, displays the matrix, and checks if every row and every column have an even number of 1s.
Answer Preview: Program plan Create a method isEvenOnes so that finds whether given row or column have the even …

, Chapter: 16 -Problem: 27 >> Listing 16.4, ComboBoxDemo.java, gives a program that lets the user view a country?s flag image and description by selecting the country from a combo box. The description is a string coded in the program. Rewrite the program to read the text description from a file. Suppose that the descriptions are stored in the files description0.txt, . . . , and description8.txt under the text directory for the
Answer Preview: Program plan Import the required packages into the program Define a class DispCountryFlag to display flags and their corresponding description by usin…

, Chapter: 4 -Problem: 15 >> The international standard letter/number mapping found on the telephone is shown below: Write a program that prompts the user to enter a letter and displays its corresponding number. Transcribed Image Text: 2 abc 3 def 5 ik 6 mmo 4 ghi 7pars 9wxya 8 tuv Enter a letter: A JEnter The corresponding
Answer Preview: Program Plan Create a class called PhoneKeypad Initialize the main method with variable s as string c as char n as integer Create a Scanner class to r…

, Chapter: 11 -Problem: 10 >> In Listing 11.10, MyStack is implemented using composition. Define a new stack class that extends ArrayList.Draw the UML diagram for the classes and then implement MyStack. Write a test program that prompts the user to enter five strings and displays them in reverse order. Listing Transcribed Image Text:
Answer Preview: Program that prompts the user to enter five strings and display them in reverse order UML diagram …

, Chapter: 5 -Problem: 50 >> Write a program that prompts the user to enter a string and displays the number of the uppercase letters in the string. Transcribed Image Text: Enter a string: Welcome to Java The number of uppercase letters is 2 -Enter
Answer Preview: Program Plan 1 Create a class StringUpperCaseCount 2 Declare and Initialize the variables int no0fUp…

, Chapter: 30 -Problem: 8 >> Rewrite Listing 30.6, ThreadCooperation.java, using the object?s wait() and notifyAll() methods. Listing Transcribed Image Text: 1 import java.util.concurrent.*; 2 import java.util.concurrent.locks.*; 3 4 public class ThreadCooperation { private static Account account - new Account(O; public stati
Answer Preview: Program plan Create a new inner class named Account to model the account with two methods depositint and withdrawint The class named DepositTask to ad…

, Chapter: 6 -Problem: 27 >> An emirp (prime spelled backward) is a nonpalindromic prime number whose reversal is also a prime. For example, 17 is a prime and 71 is a prime, so 17 and 71 are emirps. Write a program that displays the first 100 emirps. Display 10 numbers per line, separated by exactly one space, as follows: 13 17 31 37 71 73 79 97 107 113 149 157 167 179 199 311 337 347 359 389
Answer Preview: Program to print first 100 palindromic prime numbers ie prime numbers whose reversal is also a prime …

, Chapter: 13 -Problem: 16 >> Write a program similar to Listing 7.9, Calculator.java. Instead of using integers, use rationals, as shown in Figure 13.10a. You will need to use the split method in the String class, introduced in Section 10.10.3, Replacing and Splitting Strings, to retrieve the numerator string and denominator string, and convert strings into integers using the Integer.parseInt method.java Exercice1" style="" c
Answer Preview: Program Plan Create a class called Exercise1518java De…

, Chapter: 2 -Problem: 18 >> Write a program that displays the following table. Cast floatingpoint numbers into integers. Transcribed Image Text: pow (a, b) 2 2 3 4 81 1024 15625
Answer Preview: Program plan Using Math pow statement to compute the pow f…

, Chapter: 7 -Problem: 15 >> Write a method that returns a new array by eliminating the duplicate values in the array using the following method header:public static int[] eliminateDuplicates(int[] list)Write a test program that reads in ten integers, invokes the method, and displays the result. Here is the sample run of the program: Transcribed Image
Answer Preview: Program Plan Prompt and read the ten numbers from the user To implement a method eliminateDuplicates to eliminate …

, Chapter: 22 -Problem: 11 >> Section 22.10.2 introduced Graham?s algorithm for finding a convex hull for a set of points. Assume that the Java?s coordinate system is used for the points. Implement the algorithm using the following method: Write a test program that prompts the user to enter the set size and the points and displays the points that form a convex hull. Here is a sample run:
Answer Preview: Program Plan Create class convexHullGraham In convexHullGraham create methods getConvexHull which returns pointStack placeFirstPoint which places the …

, Chapter: 5 -Problem: 6 >> Write a program that displays the following two tables side by side: Transcribed Image Text: Kilometers | Kilometers 1.609 3.218 Miles 1. Miles 12.430 15.538 | 25 14.481 37.290 40.398 9. 10 60 | 65 16.090
Answer Preview: Program plan Calculate the miles to kilometers Calculate kilometers to miles Di…

, Chapter: 12 -Problem: 8 >> Exercise 12.6 implements the hex2Dec method to throw a NumberFormatException if the string is not a hex string. Define a custom exception called HexFormatException. Implement the hex2Dec method to throw a HexFormatException if the string is not a hex string. Listing implements the hex2Dec(String hexString) method, which converts a hex string into a decimal number. Implement the hex2Dec method to
Answer Preview: Output 210 Exception in thread main HexFormatException Illegal hex chara…

, Chapter: 8 -Problem: 17 >> Banks lend money to each other. In tough economic times, if a bank goes bankrupt, it may not be able to pay back the loan. A bank?s total assets are its current balance plus its loans to other banks. The diagram in?Figure 8.8 shows five banks. The banks? current balances are 25, 125, 175, 75, and 181 million dollars, respectively. The directed edge from node 1 to node 2 indicates that bank 1 lends
Answer Preview: Program plan Import the required packages into the program Define the main function Create an object …

, Chapter: 17 -Problem: 20 >> Write a GUI application that lets the user enter a file name in the text field and press the Enter key to display its binary representation in a text area. The user can also modify the binary code and save it back to the file, as shown in Figure 17.23a. Transcribed Image Text: Enter a file: cbookW
Answer Preview: Output 7 V A program to demonstrate a binary editor Compile javac BinaryEditorjava Run …

, Chapter: 5 -Problem: 4 >> Write a program that displays the following table (note that 1 mile is 1.609 kilometers):Miles                               Kilometers 1 .......................................      1.609 2 .......................................      3.218 ... 9 .......................................    14.481 10 .....................................    16.090
Answer Preview: Conversion From Miles To Kilometers Compile javac Mil…

, Chapter: 10 -Problem: 18 >> Write a program that finds five prime numbers larger than Long.MAX_VALUE.
Answer Preview: Program plan Step 1 Take the number which is grater the LongMAXVALUE Step 2 Check the number is prim…

, Chapter: 1 -Problem: 11 >> The U.S. Census Bureau projects population based on the following assumptions:? One birth every 7 seconds? One death every 13 seconds? One new immigrant every 45 secondsWrite a program to display the population for each of the next five years. Assume the current population is 312,032,486 and one year has 365 days. Hint: In Java, if two integers perform division, the result is an integer. The fract
Answer Preview: Program Create a class called Population Initialized current population as a variable name population In year 365 days are present One day means 24 ho…

, Chapter: 7 -Problem: 28 >> Write a program that prompts the user to enter 10 integers and displays all combinations of picking two numbers from the 10.
Answer Preview: Java program for combinations of two numbers Header file section import class …

, Chapter: 30 -Problem: 9 >> The iterator is failfast. Write a program to demonstrate it by creating two threads that concurrently access and modify a set. The first thread creates a hash set filled with numbers, and adds a new number to the set every second. The second thread obtains an iterator for the set and traverses the set back and forth through the iterator every second. You will receive a ConcurrentModificationExcept
Answer Preview: Output Thread 1 Thread 2 Thread 3 Concurrent Modification Exception Java program for Concurren…

, Chapter: 5 -Problem: 34 >> Programming Exercise 3.17 gives a program that plays the scissor-rock-paper game. Revise the program to let the user continuously play until either the user or the computer wins more than two times than its opponent. Transcribed Image Text: Are the following two statements equivalent? if (income <=
Answer Preview: Program plan Computer program randomly generates a number 012 r…

, Chapter: 12 -Problem: 22 >> Revise Programming Exercise 12.16 to replace a string in a file with a new string for all files in the specified directory using the command:java Exercise12_22 dir oldString newString Listing Transcribed Image Text: import java.io.*; 2 import java.util.*; 4 public class ReplaceText { public stati
Answer Preview: Program plan Import the required packages into the program Create a class Exercise1422 to replace th…

, Chapter: 2 -Problem: 19 >> Write a program that prompts the user to enter three points (x1, y1), (x2, y2), (x3, y3) of a triangle and displays its area. The formula for computing the area of a triangle is Here is a sample run: Enter three points for a triangle: 1.5 -3.4 4.6 5 9.5 -3.4 The area of the triangle is 33.6 Transcribed Image Text:
Answer Preview: Output Enter three points for a triangle 15 34 46 5 59 34 The area of the triangle is 33600000000016 …

, Chapter: 7 -Problem: 32 >> Write the following method that partitions the list using the first element, called a pivot.public static int?partition(int[] list)After the partition, the elements in the list are rearranged so that all the elements before the pivot are less than or equal to the pivot and the elements after the pivot are greater than the pivot. The method returns the index where the pivot is located in the new li
Answer Preview: Program plan Create partition method so that accepts a list of integers and then rearranges the list …

, Chapter: 16 -Problem: 24 >> Add a slider to enable the user to set the current time for the video and a label to display the current time and the total time for the video. As shown in Figure 16.47a, the total time is 5 minutes and 3 seconds and the current time is 3 minutes and 58 seconds. As the video plays, the slider value and current time are continuously updated.
Answer Preview: Program Plan The program creates a interface that plays the video with the revised version of the Li…

, Chapter: 3 -Problem: 34 >> Programming Exercise 3.32 shows how to test whether a point is on an unbounded line. Revise Programming Exercise 3.32 to test whether a point is on a line segment. Write a program that prompts the user to enter the three points for p0, p1, and p2 and displays whether p2 is on the line segment from p0 to p1. Here are some sample runs: Data from 3.32 Given a directed line from point p0(x0, y0) to p
Answer Preview: Program plan Define the class PointLineSegment Define the mainmethod Prompt the user to enter the th…

, Chapter: 13 -Problem: 18 >> Write a program that computes the following summation series using the Rational class: You will discover that the output is incorrect because of integer overflow (too large). To fix this problem, see Programming Exercise 13.15. Listing Transcribed Image Text: 2 3 98 99 3 4 99 100 1 public class Re
Answer Preview: Output 12233499100 938226 java program to compute the summation series using the …

, Chapter: 3 -Problem: 8 >> Write a program that prompts the user to enter three integers and display the integers in non-decreasing order.
Answer Preview: Program Plan Create a class called Sorting Declare three variables num1 num2 and num3 Declare and in…

, Chapter: 7 -Problem: 12 >> The reverse method in Section 7.7 reverses an array by copying it to a new array. Rewrite the method that reverses the array passed in the argument and returns this array. Write a test program that prompts the user to enter ten numbers, invokes the method to reverse the numbers, and displays the numbers.
Answer Preview: Output List elements after reverse 8 7 6 5 4 3 2 1 program reverses the elements …

, Chapter: 16 -Problem: 19 >> Write a program that displays three fans in a group, with control buttons to start and stop all of them, as shown in Figure 16.44. Transcribed Image Text: Resume Reverse Pause Pause Resume Reverse Pause Resume Reverse Start All Stop All
Answer Preview: Program Plan The program displays three fans in a group with the access to start stop all of them at …

, Chapter: 5 -Problem: 14 >> Another solution for Listing 5.9 to find the greatest common divisor of two integers n1 and n2 is as follows: First find d to be the minimum of n1 and n2, then check whether d, d-1, d-2, . . . , 2, or 1 is a divisor for both n1 and n2 in this order. The first such common divisor is the greatest common divisor for n1 and n2. Write a program that prompts the user to enter two positive integers and d
Answer Preview: Output Enter first integer 125 Enter second integer 2525 The greatest common divisor for 12…

, Chapter: 10 -Problem: 19 >> A prime number is called a Mersenne prime if it can be written in the form 2p - 1 for some positive integer p. Write a program that finds all Mersenne primes with p ? 100 and displays the output as shown below. Transcribed Image Text: 2?? — 1 2 3 3 31 5
Answer Preview: Program plan Initialise the value of p with 2 Compute the value of 2 p 1 Call function the compu…

, Chapter: 3 -Problem: 18 >> A shipping company uses the following function to calculate the cost (in dollars) of shipping based on the weight of the package (in pounds). Write a program that prompts the user to enter the weight of the package and display the shipping cost. If the weight is greater than 50, display a message ?the package cannot be shipped.?
Answer Preview: Program Plan Create a class called CostOfShipping Initialize the main method with variables weight a…

, Chapter: 10 -Problem: 3 >> Design a class named MyInteger. The class contains: ? An int data field named value that stores the int value represented by this object. ? A constructor that creates a MyInteger object for the specified int value. ? A getter method that returns the int value. ? The methods isEven(), isOdd(), and isPrime() that return true if the value in this object is even, odd, or prime, respectively. ? The sta
Answer Preview: Program to draw an UML Diagram and implement the methods is Odd is Even is Prime etc to print the va…

, Chapter: 29 -Problem: 6 >> The weighted nine tails problem in the text uses a 3 * 3 matrix. Assume that you have 16 coins placed in a 4 * 4 matrix. Create a new model class named WeightedTailModel16. Create an instance of the model and save the object into a file named WeightedTailModel16.dat.
Answer Preview: Program Plan Create a WeightedTailModell6 class and declare main method AbstractGraph class Graph cl…

, Chapter: 6 -Problem: 19 >> Create a class named MyTriangle that contains the following two methods:/** Return true if the sum of any two sides is* greater than the third side. */public static boolean?isValid(double?side1,?double?side2,?double?side3)/** Return the area of the triangle. */public static double?area(double?side1,?double?side2,?double?side3)Write a test program that reads three sides for a triangle and computes
Answer Preview: Output Enter 3 sides of a triangle 1 0 0 Invalid Input Program inputs 3 …

, Chapter: 10 -Problem: 1 >> Design a class named Time. The class contains:??The data fields?hour,?minute, and?second?that represent a time.? A no-arg constructor that creates a Time object for the current time. (The values of the data fields will represent the current time.)? A constructor that constructs a Time object with a specified elapsed time since midnight, January 1, 1970, in milliseconds. (The values of the data fie
Answer Preview: Program Plan Define a Time class o Declare the class variables hours minutes and seconds as integers …

, Chapter: 2 -Problem: 10 >> Write a program that calculates the energy needed to heat water from an initial temperature to a final temperature. Your program should prompt the user to enter the amount of water in kilograms and the initial and final temperatures of the water. The formula to compute the energy is Q = M * (finalTemperature – initialTemperature) * 4184 where M is the weight of water in kilograms, temperatures are
Answer Preview: Calculating Energy Program plan Step 1 Create the scanner for reading the input values from th…

, Chapter: 8 -Problem: 1 >> Write a method that returns the sum of all the elements in a specified column in a matrix using the following header:public static double?sumColumn(double[][] m,?int?columnIndex)Write a test program that reads a 3-by-4 matrix and displays the sum of each column. Here is a sample run: Transcribed Image Text:
Answer Preview: Program plan Create sumColumn method so that accepts a matrix of type double and an index of a …

, Chapter: 30 -Problem: 11 >> Write a program that demonstrates deadlock.
Answer Preview: Output Thread 1 Holding lock 1 Thread 2 Holding lock 2 Thread 1 Waiting for lock 2 Thread 2 Waiting …

, Chapter: 5 -Problem: 3 >> Write a program that displays the following table (note that 1 kilogram is 2.2 pounds):Kilograms                          Pounds 1 .......................................       2.2 3 ......................................        6.6 ... 197 ..................................    433.4 199 ..................................    437.8
Answer Preview: Program Plan Import the header package for input and output data in the Java program Import the Deci…

, Chapter: 12 -Problem: 15 >> Write a program to create a file named Exercise12_15.txt if it does not exist. Write 100 integers created randomly into the file using text I/O. Integers are separated by spaces in the file. Read the data back from the file and display the data in increasing order.
Answer Preview: A program to store random numbers in a file and display them on the screen Compil…

, Chapter: 5 -Problem: 43 >> Write a program that displays all possible combinations for picking two numbers from integers 1 to 7. Also display the total number of all combinations. Transcribed Image Text: 1 2 1 3 The total number of all combinations is 21
Answer Preview: Program plan The objective is t…

, Chapter: 16 -Problem: 25 >> Write a program that simulates four cars racing, as shown in Figure 16.47b. You can set the speed for each car, with maximum 100. Transcribed Image Text: 2 Car 3: 10 Car 4: Car 1: Car 2: 5 (b)
Answer Preview: Program Plan The program creates a interface that displays the racing of four cars where the speeds …

, Chapter: 5 -Problem: 47 >> ISBN-13 is a new standard for indentifying books. It uses 13 digits d1d2d3d4d5d6d7d8d9d10d11d12d13. The last digit d13 is a checksum, which is calculated from the other digits using the following formula: If the checksum is 10, replace it with 0. Your program should read the input as a string. Here are sample runs: Trans
Answer Preview: Program Plan 1 Create a class CheckISBN13 2 Declare and Initialize the variables int checksurn017 ch…

, Chapter: 11 -Problem: 15 >> A polygon is convex if it contains any line segments that connects two points of the polygon. Write a program that prompts the user to enter the number of points in a convex polygon, then enter the points clockwise, and display the area of the polygon. Here is a sample run of the program: Transcribed Image Text:
Answer Preview: Program Plan First define a Package polygon Define a Point class within the package This class store…

, Chapter: 8 -Problem: 27 >> Implement the following method to sort the columns in a twodimensional array. A new array is returned and the original array is intact.public static double[][] sortColumns(double[][] m)Write a test program that prompts the user to enter a 3 ? 3 matrix of double values and displays a new column-sorted matrix. Here is a sample run:
Answer Preview: Program Plan Create sortColumns method so that accepts a twodimensional array of type double as an a…

, Chapter: 33 -Problem: 5 >> Write a JSF program that generates addition quizzes randomly, as shown in Figure 33.29a. After the user answers all questions, it displays the result, as shown in Figure 33.29b. Transcribed Image Text: Exercise33_05 - Mozilla Firefox Fle Edit View History Bookmarks Tools Help OExercse33_05 e local
Answer Preview: Program Plan Create an xhtml file Exercise33 05 which has the title Exercise33 05 inside Program This program generate addition quiz and after user answers and submit solutions it displays the result …

, Chapter: 17 -Problem: 12 >> Write a utility program that combines the files together into a new file using the following command: java Exercise17_12 SourceFile1 . . . SourceFilen TargetFile The command combines SourceFile1, . . . , and SourceFilen into TargetFile.
Answer Preview: Output Usage java Exercise 1912 SourceFile1 SoureFilen Target…

, Chapter: 12 -Problem: 32 >> Write a program that uses the files described in Programming Exercise 12.31 and displays a ranking summary table for the first five girl?s and boy?s names as follows:The popularity ranking of baby names from years 2001 to 2010 is downloaded fromwww.ssa.gov/oact/babynamesand stored in files namedbabynameranking2001.txt,babynameranking2002.txt, . . . ,babynameranking2010.txt. Each file contains one
Answer Preview: Program Plan Import required packages ArrayList and Scanner Create a class RankingSummary Create three Array Lists for boysgirls and lines Call the me…

, Chapter: 2 -Problem: 2 >> Write a program that reads in the radius and length of a cylinder and computes the area and volume using the following formulas:area = radius * radius * ?volume = area * lengthHere is a sample run:
Answer Preview: Program Plan Import the Scanner header package for Scanner class to scan the inputs Create the class …

, Chapter: 15 -Problem: 33 >> Write a program that animates the bean machine introduced in Programming Exercise 7.21. The animation terminates after ten balls are dropped, as shown in Figure 15.36b and c. The bean machine, also known as a quincunx or the Galton box, is a device for statistics experiments named after English scientist Sir Francis Galton. It consists of an upright board with evenly spaced nails (or pegs) in a tr
Answer Preview: Output Program follows to the bean machine animation term…

, Chapter: 5 -Problem: 18 >> Use nested loops that display the following patterns in four separate programs:

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