//By implementing the Runnable class Hai2 implements Runnable { public void run() // runnable method { for(int i=1;i<=5;i++) { System.out.println("Hai"); try { Thread.sleep(1000); //in milliseconds } catch(Exception e) { System.out.println("error"); } } } } class Hello2 implements Runnable { public void run() { for(int i=1;i<=5;i++) { System.out.println("Hello"); try { Thread.sleep(1000); } catch(Exception e) { System.out.println("error"); } } } } public class MultiThreadingEx2 { public static void main(String[] args) { Hai1 obj1 = new Hai1(); Hello1 obj2 = new Hello1(); Thread t1 = new Thread(obj1); Thread t2 = new Thread(obj2); t1.start(); try { Thread.sleep(10); } catch(Exception e) { System.out.println("error"); } t2.start(); } }