$ubject Name: Advanced Object-Oriented Programming • Complete the below given program class Thread1 extends Threads { private String text; public Thread1(String n,String text) { super(n); this.text=text;} public void run(){ try{ for(int i=1;i<=3;i++){ Thread.sleep(2000); System.out.println(text); class Thread2 extends Thread { private String text; public Thread2(String n,String text) { super(n); this.text=text; } public void run(){ try{ for(int i=1;i<=2;i++){ Thread.sleep(400); System.out.println(text); )... {. .} ....... ..... {. .)} public class TestThreads { public static void main (String[] args) I }} The output must be as shown below Thread[Thread1,5,main] Thread[Thread2,5,main] Th2 Th2 Thl Th1 Th1

$ubject Name: Advanced Object-Oriented Programming • Complete the below given program class Thread1 extends Threads { private String text; public Thread1(String n,String text) { super(n); this.text=text;} public void run(){ try{ for(int i=1;i<=3;i++){ Thread.sleep(2000); System.out.println(text); class Thread2 extends Thread { private String text; public Thread2(String n,String text) { super(n); this.text=text; } public void run(){ try{ for(int i=1;i<=2;i++){ Thread.sleep(400); System.out.println(text); )... {. .} ....... ..... {. .)} public class TestThreads { public static void main (String[] args) I }} The output must be as shown below Thread[Thread1,5,main] Thread[Thread2,5,main] Th2 Th2 Thl Th1 Th1

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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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.…
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 =…
In JAVA please Write a generic AddressBook<E extends Person> class that manages a collection ofPerson objects. The AddressBook class is a generic class limited to person objects. Forexample, once you instantiate an AdressBook of Student objects, you cannot add anyother type of person objects into that instance of address book.The AddressBook should have methods to add, delete, or search for a Person objects inthe address book.• The add method should add a person object to the address book. Make sure thatthe add method does not add duplicate person objects to the address book.• The delete method should remove the specified person object from the addressbook.• The search method that searches the address book for a specified person andreturns the list of persons matching the specified criteria. The search can be doneeither by first name, last name, or person id.Write an AddressBookTester class to test your class.
Write a program in Java programming: Imagine you have a static ArrayList that contains a list of numbers(Integer). Your task is to create two threads. One thread is adding random new numbers(1~100) into the list every 1 second. The second thread is removing all the odd numbers, and printing the list on the screen every 1.5 seconds. Your program should never end and please make sure to handle any race condition to avoid the ConcurrentModificationException. Please check below for a sample output. [][][48][48][48, 2][48, 2, 8][48, 2, 8, 80, 90][48, 2, 8, 80, 90][48, 2, 8, 80, 90, 94][48, 2, 8, 80, 90, 94, 28][48, 2, 8, 80, 90, 94, 28, 80][48, 2, 8, 80, 90, 94, 28, 80, 40]
java quetion Write a generic AddressBook<E extends Person> class that manages a collection ofPerson objects. The AddressBook class is a generic class limited to person objects. Forexample, once you instantiate an AdressBook of Student objects, you cannot add anyother type of person objects into that instance of address book.The AddressBook should have methods to add, delete, or search for a Person objects inthe address book.• The add method should add a person object to the address book. Make sure thatthe add method does not add duplicate person objects to the address book.• The delete method should remove the specified person object from the addressbook.• The search method that searches the address book for a specified person andreturns the list of persons matching the specified criteria. The search can be doneeither by first name, last name, or person id.Write an AddressBookTester class to test your class.
Write a program that creates three threads in Python. The first thread will ask the user to enter a string, the second thread will also ask the user to enter another string and the third thread must find the shared letters between both strings and insert them into a list called shared_letters, then print the list. Please note that the strings are case sensitive, meaning that A doesn't equal to a etc. You must use either python global variables or a Queue.
Rewrite method inserthelp() to take advantage of the modified BSTNode in which a pointer can be either a regular pointer or a thread. Modify method printhelp() to work with threaded nodes. Add method printInorder() to do an inorder printing of your tree without the use of recursion. Add printReverse() to do a reverse order printing of your tree without resorting to recursion. You may add private helper methods as needed to make modifying or creating the methods above easier.
Define a class MyData that holds an instance variable x, a function to increment x by 5, and a getter to return the value of x. In a MyUtil class, define an aggregate relationship where MyUtil holds a MyData reference. MyUtil should extend Thread and provide an implementation for run that contains a for loop that iterates 100000 times calling the increment function of the myData reference. Define the main method in MyUtil that creates the instance of MyData. Define a data collection for storing MyUtil objects. In three separate for loops, (1) create and add five instances of MyUtil to the data collection previously defined. (2) Call the start function on each thread. (3) Ensure each thread completes before main completes. Print out the value of x from myData. In a brief comment, describe what is happening when you execute the program several times. Also in the comment, what keyword could be used where to prevent the issue seen?
Output of public class Test implements Runnable { public void run() { System.out.println( "running!" ); } public void start( inti ) { } public static void main( String[] args ) { Test t = new Test(); Thread th = new Thread( t ); t.start( 1 ); } }
For the following code I get an error: Exception in thread "main" java.lang.Error: Unresolved compilation problems: The type LinkedListIn is not generic; it cannot be parameterized with arguments <String> The type LinkedListIn is not generic; it cannot be parameterized with arguments <> at linkedList.LinkedListTester.main(LinkedListTester.java:5) How can I fix it? package linkedList; public class LinkedListTester { public static void main(String[] args) { LinkedListIn<String> list = new LinkedListIn<>(); list.display(); list.add("Station 1"); list.add("Station 2"); list.add("Station 3"); list.add("Station 4"); // Print the linked list System.out.println("All Stations: " + list); // Accessing the first item System.out.println("First stop: " + list.getFirst()); // Accessing the last item System.out.println("Last stop: " + list.getLast()); // Removing the first item System.out.println("Left this station: " + list.removeFirst()); //…
Implement a Multithreaded Sudoku Solution Validator using POSIX thread library in C Specifications This assignment consists of designing a multithreaded application that determines whether the solution to a Sudoku puzzle is valid. A Sudoku puzzle uses a 9×9 grid in which each column and row, as well as each of the nine 3×3 subgrids, must contain all of the digits 1 to 9. Following figure presents an example of a valid Sudoku puzzle solution. There are several different ways of multithreading this application. In this assignment, you need to implement the strategy to create multiple worker threads that check the following criteria: Nine threads to check that each of the 9 columns contains the digits 1 through 9 Nine threads to check that each of the 9 rows contains the digits 1 through 9 Nine threads to check that each of the 3×3 subgrids contains the digits 1 through 9 This would result in a total of 27 separate worker threads for validating a Sudoku puzzle solution.The parent…
Read 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"); } }