// This program is synchronized class Callme { synchronized void (String msg) { System.out.print("[" + msg); Exercise2: Find and correct the errors from the following program and then compile it. After compilation run the program and write the output in the box bellow. try { } Code: Thread.sleep(); } catch (InterruptedException e) { System.out.println("Interrupted"); } System.out.print("]"); } class Caller implements Runnable { String msg; Callme target; Thread t; public Caller (Callme targ, String s) { target= targ; } msgs; t = new Thread(this); t.start(); public void run () { target.call(msg); } } class Synch { public static void main (String args[]) { Callme target = new Callme(); Caller obl Caller ob2 Caller ob3 try { obl..join(); ob2..join(); ob3..join(); }catch (InterruptedException e) { System.out.println("Interrupted"); } new Caller (target, "Hello"); new Caller (target, "Synchronized"); new Caller (target, "World"); }

What is wrong with this code it creates a file Exercise17_1 but no input into the file? package randomintegers; import java.io.*;import java.util.*; public class RandomIntegers { public static void main(String[] args)throws Exception{ PrintWriter out = new PrintWriter(new FileOutputStream("Exercise17_1.txt",(true)); { for(int j=0;j<100; j++) out.print((int)(Math.random()*100000)+""); } }}

FilelO 01: Write a Message Write a FileI001 class with a method named writeMessage() to takes message as a String and a filename (as a String) (in that order). Have the method, write the message to the filename. Your code will either need to 1) catch all checked exceptions or 2) use the throws keyword. public class FileI001{ public void writeMessage( String message, String filename ){

Select all true statements import java.io.File; import java.util.Scanner; public class DirectorySize { public static void main(String[] args) { // Prompt the user to enter a directory or a file System.out.print("Enter a directory or a file: "); Scanner input = new Scanner(System.in); String directory = input.nextLine(); // Display the size System.out.println(getSize(new File(directory)) + " bytes"); } public static long getSize(File file) { long size = 0; // Store the total size of all files if (file.isDirectory()) { File[] files = file.listFiles(); for (int i = 0; files != null && i < files.length; i++) { size += getSize(files[i]); // Recursive call } } else { // Base case size += file.length(); } return size; } } a. The length() method returns the size of a file. b. The listFiles() method returns an array of File objects and excludes each directory....

public static void connectToInputFile() {Scanner inputStream = null;String inputFileName = getFileName("Enter name of input file: ");try{inputStream = new Scanner(new File("SortedA.txt"));}catch(FileNotFoundException e){System.out.println("File " + inputFileName + " not found. ");}catch(IOException e){System.out.println("Error opening input file: " + inputFileName);}}private static String getFileName(String prompt){String fileName = null;System.out.println(prompt);Scanner keyboard = new Scanner (System.in);fileName = keyboard.next();return fileName;}public static void connectToOutputFile(){String outputFileName = getFileName("Enter name of output file: ");try{outputStream = new ObjectOutputStream(new FileOutputStream("SortedArray.csv"));}catch(IOException e){System.out.println("Error opening output file" + outputFileName);System.out.println(e.getMessage());}}public static void closeFiles(){try{inputStream.close();outputStream.close();}catch(IOException e){System.out.println("Error...

Use stacks to implement a postfix-to-infix translator. Until the user closes the programme, it should continually read a postfix expression and output the identical infix expression. If the postfix expression entered is incorrect, throw an exception.

Java Program ASAP Modify this program so it passes the test cases in Hypergrade. Also change the public class to FileSorting import java.io.*;import java.util.Scanner;public class ConvertText { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(System.in); System.out.println("Please enter the file name or type QUIT to exit:"); while (true) { String input = sc.next(); if (input.equalsIgnoreCase("QUIT")) { break; // Exit the program } else { String filePath = new File("").getAbsolutePath() + "/" + input; File file = new File(filePath); if (file.exists() && !file.isDirectory()) { try (BufferedReader br = new BufferedReader(new FileReader(file))) { String st; StringBuilder formattedText = new StringBuilder(); while ((st = br.readLine()) != null)...

/*TASK 5. Implement part 1 of the report. You need to read data from input.txt file, store it into array of items (called items) and write it in a formatted form to the output file. Code, debug and present it in the best possible format. Hint: It might be helpful to format the String coming from toString( ) method using String.format( ) method, which works similar to System.out.prinf. Hint2: You might have to close and delete existing output .doc or .txt file from its folder * public class YourUserName_hw7 { static Item [ ] items = new Item [200];//an array of Items static EdibleItem [ ] edibleItems;//an array of Edible Items static int countEdibleitems = 0;//count edible items static String pageHeader; //save the header //main( ) method runs the program public static void main(String[ ] args) throws FileNotFoundException { double sum = 0, average = 0; //Optional - create a new input file //CreateInput.createInputFile( );...

Lab Activities: Exercise 1: 1) Write a thread class TabPrinter that prints the elements of an array of integers (in one line) every 2 seconds 5 times. Use the way of extending the class thread. Write the main method which creates and starts three threads Printer which will print different arrays of integers. After that it prints "Main won't wait. Main exits". 2) Modify the above thread program so that you implement the interface Runnable. Make the main thread waiting till all other threads finish execution.

Create the Singly Linked List after having executed the following methods. Each item must have a headand tailreference. Whenever a method is not expected or invalid, write Exception. Only the process not the code •addHead("Dancing") •addHead("Backup") •addHead("Backup") •addTail("Backup") •addTail("Backup") •removeHead()

Computer Science For the basic ADT Queue operations, list all cases when a QueueException will be thrown. Each item listed should be no more than 10 words and ONLY in the form "exception name : cause of exception". Remember to use correct terminology or the answer will not be accepted

#SumCalculator Class: Create a class named SumCalculator that extends the Thread class. This class calculates the sum of numbers within a provided range. Declare three instance variables: start, end, and sum in the SumCalculator class . start and end are the lower and upper bounds of the range, respectively, while sum stores the sum of the numbers within the range. Create a constructor that takes in two parameters: start and end, and initializes the corresponding instance variables. The sum variable should be initialized to 0. Define the run method to calculate the sum of the numbers within the range. Inside of the run method use a for-loop to iterate over the numbers within the range and add each number to the sum variable. Define the accessor method getSum that returns the value of the sum variable. #Main Class: Create a class named Main that contains the main method, the entry point of the program. Create two objects of the SumCalculator class , with the first...