7. Write an application in Java that creates and starts three threads. a. Each thread is instantiated from the same class. b. It executes a loop with 10 iterations. i. Each iteration displays the string "HELLO" ii. Sleeps for 300 milliseconds. c. The application waits for all the threads to complete & displays the message "Good Bye...".
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A: The answer is given below step.
7. Write an application in Java that creates and starts three threads.
a. Each thread is instantiated from the same class.
b. It executes a loop with 10 iterations.
i. Each iteration displays the string "HELLO"
ii. Sleeps for 300 milliseconds.
c. The application waits for all the threads to complete & displays the message "Good Bye...".
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- This is a part of my code where it converts a binary to a decimal. The constructor should take a String parameter, and convert that to an int array. The ConvertBinToDec should then take the int array and convert it to decimal. The other picture is part of the main, where user inputs the string. The code is not working and giving an error of Exception in thread "main" java.long.NullPointerException. Please tell me how can I solve this. The user should input a binary such as "111" and the decimal value that should be printed is 7. public Binary(String binS) {String[] t = binS.split("");for (int i = 0; i < t.length; i++) {bin[i] = Integer.parseInt(t[i]);}}public int getDec() {convertBinToDec(bin);return dec;}// convert the bin array to decimal valueprivate int convertBinToDec(int[] bin) {int num = 1;for(int i = bin.length - 1; i >= 0; i-- ) {if (bin[i] == 1) {dec += num;}num = num * 2;}return 0;} Main: System.out.print("Enter binary:");String line = keyboardInput.next();Binary b2 =…4. naloga:1. Write a program in the Java programming language where two threads access thecommon object of the Print class.2. Class Print contains only one variable type String, whose value is assigned by theconstructor.3. Both threads access the object of the class Print and print in reverse order the valueof the variable type String, letter by letter, where each letter is printed with a hyphen(–).Example for FAMNIT: T–T–I–I–N–N–M–M–A–A–F–FWhenever I create an input text file and run the application I get this error message. Exception in thread "main" java.lang.NumberFormatException: empty String at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1842) at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110) at java.base/java.lang.Double.parseDouble(Double.java:651) at javaapplication3.RegularPolygonMain.main(RegularPolygonMain.java:30) How do I fix this? Code: File 1: package javaapplication3;public class RegularPolygon {private int numSides; private double side;private double x;private double y; RegularPolygon() { this.numSides = 3; this.side = 1; this.x = this.y = 0;} RegularPolygon(int sides, double sideLength) { this.numSides = sides; this.side = sideLength; this.x = this.y = 0;} RegularPolygon(int sides, double eachSideLen, double x1, double y1) { this.numSides = sides; this.side = eachSideLen; this.x = x1; this.y = y1;}public…
- Every time I run, there's an error in the source code: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds for length 2 at CustomDie.getFace(CustomDie.java:35) at Test4.main(Test4.java:21)stdout is not correct In some test cases: exception in thread "main" java.util.NoSuchElementException please fix this code and add a counter. The desired output is given in the picture. Also please add spaces where it belongs import java.io.File;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Scanner; class Name {public Name(String last, String first) {this.last = last;this.first = first;} public Name(String first) {this("", first);} public String getFirst() {return first;} public String getLast() {return last;} public String getFormal() {return first + " " + last;} public String getOfficial() {return last + " " + first;} public String getInitials() {return first.charAt(0) + "_" + last.charAt(0) + "_";} public boolean equals(Name other) {return first.equals(other.first) && last.equals(other.last);} public String toString() {return first + " " + last;} public static Name read(Scanner scanner) {if (!scanner.hasNext())return null;String last =…The code below gives the error : Exception in thread "main" java.lang.IllegalArgumentException: bound must be positive at java.base/java.util.Random.nextInt at the line code (arr[i]=rand.nextInt(high-low+1)+low). How to fix this?? public static int[] generateIntArray(int size, int low, int high){ Random rand = new Random(); int[] arr=new int[size]; for(int i=0;i<size;i++){ arr[i]=rand.nextInt(high-low+1)+low; } return arr; } }
- I. Output of public class Test implements Runnable { public void run() { System.out.println( "running!" ); } public void start( int i ) { } public static void main( String[] args ) { Test t = new Test(); Thread th = new Thread( t ); t.start( 1 ); } } II. Output of public static void main(String[] args) { int[] arr = { 0, 1, 2, 3, 4 }; System.out.println( arr[arr[arr.length-1]] ); } III. System.out.println (“3 in binary Nos=” + “Integer.toBinaryString(3)”); IV. Will the following java code compile? if not why? if yes write the output. abstract class A { abstract void callme(); // concrete methods are still allowed in abstract classes void callmetoo() { System.out.println("This is a concrete method."); } } class B extends A { void callmetoo() { System.out.println("B's implementation of callme."); } } class AbstractDemo { public static void main(String args[]) { B b = new B(); b.callmetoo(); } } } V.…I'm getting the error (below) when trying to run the program. My debugging skills aren't too great, so thanks in advance for the help. ERROR: "Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds for length 2 at TestStudent.main(TestStudent.java:26)" CODE: import java.io.File;import java.io.FileNotFoundException;import java.util.Scanner; public class TestStudent { private static final String STUDENT_FILE = "ClassesData.dat";private static final String COURSE_FILE = "CoursesData.dat"; public static void main(String[] args){Scanner studentFileReader, courseFileReader;Student student = null;Course course = null; try{studentFileReader = new Scanner(new File(STUDENT_FILE));while(studentFileReader.hasNextLine()){String line = studentFileReader.nextLine().trim();String[] data = line.split(",");String name = data[0];String major = data[1];String className = data[2];int credits = Integer.parseInt(data[3]);char grade = data[4].charAt(0); student = new…Suppose you have Java source files under the directorieschapter1, chapter2, . . . , chapter34. Write a program to remove the statement package chapteri; in the first line for each Java source file underthe directory chapteri. Suppose chapter1, chapter2,. . . , chapter34are under the root directory srcRootDirectory.The root directoryandchapteridirectory may contain other folders and files. Use the followingcommand to run the program:java Exercise12_20 srcRootDirectory
- 1. ArrayIndexOutOfBoundsException Given the following code: public class ExceptionTest{ public static void main( String[] args ){ String nums[] = {“one”, “two”, “three”}; for( int i=0; i<=3; i++ ){ System.out.println(nums[i]); } } } Compile and run the TestExceptions program. The output should look like this: one two three Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3 at ExceptionTest.main(1.java:4) Modify the TestExceptions program to handle the exception. The output of the program after catching the exception should look like this: one two three Exception caught: Array Index 3 is out of boundsRead the following main class. Try to guess what will be its output. class Test { public static void main(String s[]) throws Exception { TextThread x = new TextThread ("I am thread x"); TextThread y= new TextThread ("I am thread y"); x.start(); y.start();System.out.println("I am Main thread"); } }in java Integer cradleQuantity and string friendName are read from input. A FileOutputStream named fileStream is declared and the file named cradle.txt is opened. Then, a PrintWriter named cradleWriter is declared and associated with the file. Write the following to the opened file: "Remember:" "* * * *" cradleQuantity, followed by " cradles for " and friendName Another "* * * *" End each output with a newline. Finally, close the file. Ex: If the input is 12 Dax, then cradle.txt contains: Remember: * * * * 12 cradles for Dax * * * * Note: Data written to a file may be lost if the file is not closed. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 public class FileOutput { publicstaticvoidmain(String[] args) throwsIOException { Scannerscnr=newScanner(System.in); FileOutputStreamfileStream=null; PrintWritercradleWriter=null; intcradleQuantity; StringfriendName; cradleQuantity=scnr.nextInt(); friendName=scnr.next();…