Write a Java multithreaded program having 3 threads, 1st user input will be given at the command line. then 1st thread will calculate whether that user given number is palindrome or not.

import java.util.Scanner;

public class vinnu11 {

    public static void main(String args[]) {
        Scanner vinnu = new Scanner(System.in);
        int a;
        Thread t;
        System.out.print("Enter the number  : ");
        a = vinnu.nextInt();
        FirstThread firstThread = new FirstThread(a);               //Creating an object of the first thread
        SecondThread secondThread = new SecondThread(a);            //Creating an object of the Second thread
        firstThread.start();                                        //Starting the first thread  
        secondThread.start();                                       //Starting the second thread
        try {
            firstThread.join();
        } catch (InterruptedException ex) {
        }

        try {
            secondThread.join();
        } catch (InterruptedException ex) {
        }

        if (firstThread.isAlive()) {
            System.out.println("first thread is alive ");
        } else {
            System.out.println("first thread is not  alive ");
        }

        if (secondThread.isAlive()) {
            System.out.println("second thread is alive ");
        } else {
            System.out.println("second thread is not  alive ");
        }

        factorial(a);



    }

    static void factorial(int a) {
        int i, j, k;
        k = a;
        j = 1;
        while (a > 0) {
            j = j * a;
            a--;
        }
        System.out.println("THREAD MAIN : Factorial of " + k + " = " + j);

    }
}

class FirstThread extends Thread {

    private int a;

    public FirstThread(int a) {
        this.a = a;
    }

    public void run() {
        int i, j, y, x, k;
        k = a;
        y = 0;
        i = 0;
        while (a > 0) {
            i = a % 10;        /// modulos of a
            y = (y * 10) + i;    /// multiply 10 to y and adding i
            a = a / 10;         ///take example of 123
        }

        if (k == y) {
            System.out.println("THREAD 1 : " + k + " == " + y);
            System.out.println("THREAD 1 : " + "The given number is an palindrome number !!!");
        } else {

            System.out.println("THREAD 1 : " + "The given number is not a palindrome number !!");
        }

    }
}

class SecondThread extends Thread {

    int a;

    public SecondThread(int a) {
        this.a = a;
    }

    @Override
    public void run() {
        int i, j, n;
        point:
        for (i = 2; i < a; i++) {
            for (j = 2; j < i; j++) {
                n = i % j;
                if (n == 0) {
                    continue point;
                }

            }
            System.out.println("THREAD 2 : " + i + " is an prime number ");

        }
    }
}