MultiThreading.java

package com.programs;


import java.util.Random;
import java.util.Scanner;

class Runnable1 implements Runnable {

    public void run() {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the number to find square:");
        int a = in.nextInt();
        int b = a*a;
        System.out.println("The sqaure is:"+b);
    }
}

class Runnable2 implements Runnable {
    public void run() {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the number to find cube:");
        int a = in.nextInt();
        int d = a*a*a;
        System.out.println("The cube is:"+d);
    }
}

class Runnable3 implements Runnable {
    public void run() {
        int n,i;
        Scanner in = new Scanner(System.in);
        Random rand = new Random();
        n = rand.nextInt(50);
        System.out.println("Enter the number of elements:");
        n = in.nextInt();
        int arr[] = new int[n];
        for(i=0;i<n;i++)
            arr[i] = rand.nextInt(50);
        System.out.println("The random elements are:");
        for(i=0;i<n;i++)
            System.out.println(arr[i]);
    }
}
public class MultiThreading {
    public static void main(String[] args) throws InterruptedException {
        Runnable r1 = new Runnable1();
        Thread t1 = new Thread(r1);
        t1.start();
        Thread.sleep(5000);

        Runnable r2 = new Runnable2();
        Thread t2 = new Thread(r2);
        t2.start();
        Thread.sleep(5000);

        Runnable r3 = new Runnable3();
        Thread t3 = new Thread(r3);
        t3.start();
    }
}