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Engineering

Computer Science

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EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter7: Characters, Strings, And The Stringbuilder

Section: Chapter Questions

Problem 12RQ

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package ch08.apps;import ch08.maps.*; public class HMapDriver { public static void main(String[] args) { boolean result; HMap<String, String> test; test = new HMap<String, String>(10,0.75); /*String s = null;test.put(s,"value");test.put("s",null);System.out.println("Expect 'null':\t" + test.get("s"));System.out.println("Expect 'true':\t" + test.contains("s"));test = new ArrayListMap<String, String>();*/ System.out.println("Expect 'true':\t" + test.isEmpty()); System.out.println("Expect '0':\t" + test.size()); System.out.println("Expect 'null':\t" + test.put("1", "One")); System.out.println("Expect 'false':\t" + test.isEmpty()); System.out.println("Expect '1':\t" + test.size()); System.out.println("Expect 'One':\t" + test.put("1", "One")); System.out.println("Expect 'false':\t" + test.isEmpty()); System.out.println("Expect '1':\t" + test.size()); test.put("2", "Two"); test.put("3", "Three");…
sortLecNotes sortsearchassigncodeex1.java sort, search for a specific student package sortsearchassigncodeex1; import java.util.Scanner; import java.io.*; // // public class Sortsearchassigncodeex1 { // public static void fillArray(Scanner inputFile, int[] arrIn){ int indx = 0; //Complete code { arrIn[indx] = inputFile.nextInt(); indx++; } } //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- public static void displayArray(int[] arrIn){ for(int indx=0; indx<arrIn.length;indx++) System.out.printf("student %2d sID: %5d\n",(indx+1),arrIn[indx]); } //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- public static int searchArray(int[] arrIn, int sValue){ int retValue = -1; // if the value is not found method will return -1 for(int indx=0; //Complete code ;indx++) if(arrIn[indx] == sValue) retValue = indx; return retValue; }…
java: Run length coding is a method to represent a string in a more compact manner. Each character that occurs more than 2 times in a row is represented by the character and a number following it. Two examples are: "abba" → "abba""abcccbbbba" → "abc3b4a"Write a function that calculates how many characters the encoded string is shorter than the original.
Make the code output sentence starts with a capitalization, and ends with a period. public class Word implements IWord{ private String word; public Word(String word){ this.word = word; } @Override public String getWord(){ return word; }} public class CompoundWord implements IWord { private IWord word1; private IWord word2; public CompoundWord(IWord w1, IWord w2){ word1 = w1; word2 = w2; } @Override public String getWord(){ return word1.getWord() + word2.getWord(); } } import java.util.ArrayList;public class Sentence { private ArrayList<IWord> words; public Sentence(){ words = new ArrayList<IWord>(); } public Sentence add(IWord word){ words.add(word); return this; } public String getSentence(){ String result = ""; for(IWord word:words) result += word.getWord()+" "; return…
sortsearchassigncodeex1.java sort, search for a specific student package sortsearchassigncodeex1; import java.util.Scanner; import java.io.*; // // public class Sortsearchassigncodeex1 { // public static void fillArray(Scanner inputFile, int[] arrIn){ int indx = 0; //Complete code { arrIn[indx] = inputFile.nextInt(); indx++; } } //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- public static void displayArray(int[] arrIn){ for(int indx=0; indx<arrIn.length;indx++) System.out.printf("student %2d sID: %5d\n",(indx+1),arrIn[indx]); } //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- public static int searchArray(int[] arrIn, int sValue){ int retValue = -1; // if the value is not found method will return -1 for(int indx=0; //Complete code ;indx++) if(arrIn[indx] == sValue) retValue = indx; return retValue; }…
javascript only: Write a function `popularLetters(string)` that takes a string as an argument and returns an array of all of the characters that appear five or more times in the string. Examples: console.log(popularLetters('apple')); // [] console.log(popularLetters('bananas in pajamas')); // [ 'a' ] console.log(popularLetters('Yes, we have no bananas, we have no bananas today!')); // [ 'e', ' ', 'a', 'n' ]
JAVA Language: Transpose Rotate. Question: Modify Transpose.encode() so that it uses a rotation instead of a reversal. That is, a word like “hello” should be encoded as “ohell” with a rotation of one character. (Hint: use a loop to append the letters into a new string) import java.util.*; public class TestTranspose { public static void main(String[] args) { String plain = "this is the secret message"; // Here's the message Transpose transpose = new Transpose(); String secret = transpose.encrypt(plain); System.out.println("\n ********* Transpose Cipher Encryption *********"); System.out.println("PlainText: " + plain); // Display the results System.out.println("Encrypted: " + secret); System.out.println("Decrypted: " + transpose.decrypt(secret));// Decrypt } } abstract class Cipher { public String encrypt(String s) { StringBuffer result = new…
For any element in keysList with a value greater than 40, print the corresponding value in itemsList, followed by a semicolon (no spaces). Ex: If the input is: 32 105 101 35 10 20 30 40 the output is: 20;30; import java.util.Scanner; public class Compare { public static void main(String args[]) {final int SIZE_LIST = 4;int[] keysList = new int[SIZE_LIST];int[] itemsList = new int[SIZE_LIST];int i;Scanner input = new Scanner(System.in); keysList[0] = input.nextInt();keysList[1] = input.nextInt();keysList[2] = input.nextInt();keysList[3] = input.nextInt(); itemsList[0] = input.nextInt();itemsList[1] = input.nextInt();itemsList[2] = input.nextInt();itemsList[3] = input.nextInt(); /* Your code goes here */ System.out.println();} }
Write a for loop to print all elements in courseGrades, following each element with a space (including the last). Print forwards, then backwards. End each loop with a newline. Ex: If courseGrades = {7, 9, 11, 10}, print: 7 9 11 10 10 11 9 7 Hint: Use two for loops. Second loop starts with i = courseGrades.length - 1. import java.util.Scanner; public class CourseGradePrinter {public static void main (String [ ] args) {Scanner scnr = new Scanner(System.in);final int NUM_VALS = 4;int [ ] courseGrades = new int[NUM_VALS];int i; for (i = 0; i < courseGrades.length; ++i) {courseGrades[i] = scnr.nextInt();} /* Your solution goes here */ }}
Question-2: Write a Python program that takes a string as an input where multiple numbers are separated by hashes(#). Your first task is to create a list of numbers and print it. Your second task is to create a dictionary that will have the index of the list as key, and for the even indices, multiplication from start to that index as value, while for the odd indices, summation from start to that index as value. Finally, print the dictionary. . ================================================ Sample Input 1: 1#2#3#4 Sample Output 1: [1, 2, 3, 4] {0: 1, 1: 3, 2: 6, 3: 10} Explanation 1: key 0 → value 1 key 1 → value 1+2 = 3 key 2 → value 1x2x3 = 6 key 3 → value 1+2+3+4 = 10 ================================================ Sample Input 2: 5#6#7 Sample Output 2: [5, 6, 7] {0: 5, 1: 11, 2: 210} Explanation 2: key 0 → value 5 key 1 → value 5+6 = 11 key 2 → value 5x6x7 = 210..
Question-2: Write a Python program that takes a string as an input where multiple numbers are separated by hashes(#). Your first task is to create a list of numbers and print it. Your second task is to create a dictionary that will have the index of the list as key, and for the even indices, multiplication from start to that index as value, while for the odd indices, summation from start to that index as value. Finally, print the dictionary. . ================================================ Sample Input 1: 1#2#3#4 Sample Output 1: [1, 2, 3, 4] {0: 1, 1: 3, 2: 6, 3: 10} Sample Input 2: 5#6#7 Sample Output 2: [5, 6, 7] {0: 5, 1: 11, 2: 210}
//import java.util.List; import javax.swing.*; import javax.swing.event.*; import java.awt.*; /** * JList basic tutorial and example * * @author wwww.codejava.net */ public class JListTask1_Student_Version extends JFrame { //define a Jlist Component // Define a String array that use to create the list private JPanel ContryPanel; // To hold components private JPanel selectedcontryPanel; // To hold components // define a TextFiles to show the result private JLabel label; // A message /** Constructor */ public JListTask1_Student_Version(){ setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setTitle("JList Task1"); setSize(200, 200); setLayout(new BorderLayout()); // Build the month and selectedMonth panels. // Add the panels to the content pane. // add(new JScrollPane(countryList)); setLocationRelativeTo(null); setVisible(true); } public void buildcontryPanel() { // Create a panel to hold the list. ContryPanel = new JPanel(); //create the list // Set the selection mode to single…