4) Read the following second main class. Guess its output. class Test { public static void main(String s[]) throws Exception { TextThread x= new TextThread ("Hello"); TextThread y = new TextThread ("Java"); x.start(); x.join(); y.start(); System.out.println("I am Main thread");

4) Read the following second main class. Guess its output. class Test { public static void main(String s[]) throws Exception { TextThread x= new TextThread ("Hello"); TextThread y = new TextThread ("Java"); x.start(); x.join(); y.start(); System.out.println("I am Main thread");

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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Question

4) Read the following second main class. Guess its output.
class Test {
public static void main(String s[]) throws Exception {
TextThread x = new TextThread ("Hello");
TextThread y = new TextThread ("Java");
x.start();
x.join();
y.start();
System.out.println("I am Main thread");
5) Write it and execute it to check your previous answer.

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Exercise 1: 1) Read the following code and try to guess what will be its output. import java.util.*;class Car { private int speed;public void setSpeed(int s){ this.speed=s; } public int getSpeed(){ return speed; } } class ChangeSpeedCar extends Thread{Car car; int step;public ChangeSpeedCar(Car obj,String s,int a){ super(s);this.step=a;this.car=obj; }public void run(){ for(int i=0;i<10000;i++) { int c=car.getSpeed(); c+=step;car.setSpeed(c);} }}public class test {public static void main(String[]args){ Car obj =new Car();obj.setSpeed(0);ChangeSpeedCar Th1 = new ChangeSpeedCar(obj , "MyThread1",1); ChangeSpeedCar Th2 = new ChangeSpeedCar(obj , "MyThread2",-1); Th1.start(); Th2.start();try{Thread.sleep(1000);}catch(Exception e){System.out.print("Error");}System.out.println("The speed of the car is "+obj.getSpeed());}}Output:2) Write the code and execute it many times. Is the output similar to your previous answer? What’s the issue? How can you modify the code to obtain the expected…
JAVA programming language
1 import java.util.Scanner; 2 3 public class LabProgram { m & in 6780 4 5 7 } public static void main(String[] args) { /* Type your code here. */ }
Java
Given string inputStr on one line and integers idx1 and idx2 on a second line, output "Match found" if the character at index idx1 of inputStr is equal to the character at index idx2. Otherwise, output "Match not found". End with a newline. Ex: If the input is: eerie 4 1 then the output is: Match found Note: Assume the length of string inputStr is greater than or equal to both idx1 and idx2.
import java.util.Scanner;import java.util.InputMismatchException; public class LabProgram { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); /* Type your code here. */ }}
Solution question number 2
StringFun.java import java.util.Scanner; // Needed for the Scanner class 2 3 /** Add a class comment and @tags 4 5 */ 6 7 public class StringFun { /** * @param args not used 8 9 10 11 12 public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Please enter your first name: "); 13 14 15 16 17 18 System.out.print("Please enter your last name: "); 19 20 21 //Output the welcome message with name 22 23 24 //Output the length of the name 25 26 27 //Output the username 28 29 30 //Output the initials 31 32 33 //Find and output the first name with switched characters 34 //All Done! } } 35 36 37
The language is Java. The method to use is provided!
Java programming using do-while loop