Question

Part I Implement a thread by extending the Thread class. Your thread must do the following: (25 pts.) • Print its name and ID at the start. • Print the numbers from 1 to 100 that can be divided by 5. • Wait 1 second before printing a number. Part II Implement a thread by implementing the Runnable interface. Your thread must do the following: (25 pts.) • Print its name and ID at the start. • Print the numbers from 1 to 100 that can be divided by 3. • Wait 2 seconds before printing a number. Part III Create a new class and do the following: (25 pts.) • Run these two threads together at the same time. • Terminate first thread in 10 seconds after it starts. • Terminate second thread in 15 seconds after it starts. Part IV Create a new class and do the following: (25 pts.) • Start the second thread after the first one finishes.

Please use java Language

Answer 1

package test.codechef;

import java.util.*;
import java.io.*;

class abc {

    public static void main(String[] args) throws Exception {

        ThreadOne th1 = new ThreadOne();
        Thread th2 = new Thread(new ThreadTwo());

        //CODE TO RUN THE TWO THREADS TOGETHER.        
        th1.start();
        th2.start();
        
        //wait 10 seconds
        Thread.sleep(10000);
        System.out.println("\n10 seconds donee...........");
        System.out.println("Stopping first thread.");
        
        //stop 1st thread
        th1.stopthread();
        
        //wait 5 seconds more...
        Thread.sleep(5000);
        
        System.out.println("Stopping second thread.");
        th2.stop();
        
        
        //CODE TO RUN 2ND THREAD AFTER FIRST ONE FINISHES.
//        System.out.println("Starting 1st thread...");
//        th1.start();
//        th1.join();
//        System.out.println("Staring 2nd thread...");
//        th2.start();
//        th2.join();      
//        
    }
}

class ThreadOne extends Thread {


    public void stopthread() {
        this.stop();
    }

    public void run() {
        try {
            //
            System.out.println("Thread Name: " + Thread.currentThread().getName());
            System.out.println("Thread ID: " + Thread.currentThread().getId());

            System.out.println("Numbers divisible by 5:");
            for (int i = 1; i <= 100; i++) {
                if (i % 5 == 0) {
                    Thread.sleep(1000);
                    System.out.print(i + " ");
                }
            }
            System.out.println("");

        } catch (Exception e) {
            System.out.println("Exception is caught.");
        }
    }
}

class ThreadTwo implements Runnable {
    
    public void stopthread() {
        Thread.currentThread().stop();
        System.out.println("Stopped.");
    }

    public void run() {
        try {
            //
            System.out.println("Thread Name: " + Thread.currentThread().getName());
            System.out.println("Thread ID: " + Thread.currentThread().getId());

            System.out.println("Numbers divisible by 3:");
            for (int i = 1; i <= 100; i++) {
                if (i % 3 == 0) {
                    Thread.sleep(2000);
                    System.out.print(i + " ");
                }
            }
            System.out.println("");
        } catch (Exception e) {
            System.out.println("Exception caught.");
        }
    }
}

OUTPUT:

1. When both threads are started simultaneously:

Thread Name: Thread-1
Thread Name: Thread-0
Thread ID: 11
Thread ID: 10
Numbers divisible by 3:
Numbers divisible by 5:
5 3 10 15 20 6 25 30 9 35 12 40 45 
10 seconds donee...........
Stopping first thread.
15 18 21 Stopping second thread.

2. When 2nd thread starts after first:

Starting 1st thread...
Thread Name: Thread-0
Thread ID: 10
Numbers divisible by 5:
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 
Staring 2nd thread...
Thread Name: Thread-1
Thread ID: 11
Numbers divisible by 3:
3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99 
BUILD SUCCESSFUL (total time: 1 minute 26 seconds)

Hope this helps. Best wishes!!!