public class TwoThreads {
/*	public static class Thread1 extends Thread {
		public void run() {
			System.out.println("A");
			System.out.println("B");
		}
	}

	public static class Thread2 extends Thread {
		public void run() {
			System.out.println("1");
			System.out.println("2");
		}
	} */

	public static class ThreadAB implements Runnable{

		Thread t;
		String s1;
		String s2;

		public ThreadAB(String string1, String string2) {
			// TODO Auto-generated constructor stub
			s1=string1;
			s2=string2;
		}

		@Override
	    public void run(){

	        System.out.println(s1);
	        System.out.println(s2);

	        }

	    public void start()
	    {
	    	run();
	    }
	}

	public static void main(String[] args) {

		new ThreadAB("A","B").start();
		new ThreadAB("1","2").start();
	}
}