thex.java

public class thex {
    public static void main(String[] args) {
        Thread th = new Thread() {
            @Override
            public void run() {
                for (int i = 0; i < 100; i++) {
                    try {
                        Thread.sleep(200); 
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(i);
                }
            }
        };
        Thread th2 = new Thread() {
            @Override
            public void run() {
                for (int i = 0; i < 100; i++) {
                    System.out.println(i * -1);
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };
        th.start();
        th2.start();
    }
}