1 package h14; 2  3 public class Demo { 4  5     /** 6      * @param args 7      */ 8     public static void main(String[] args) { 9         // TODO Auto-generated method stub10         Thread cat = new Cat();11         cat.start();12         Runnable dog = new Dog();13         Thread t = new Thread(dog);14         t.start();15     }16 17 }18 19 class Cat extends Thread{20 21     @Override22     public void run() {23         // TODO Auto-generated method stub24         super.run();25         int i = 0;26         while(true){27             try {28                 i++;29                 Thread.sleep(1000);30             } catch (InterruptedException e) {31                 // TODO Auto-generated catch block32                 e.printStackTrace();33             }34             System.out.println(i);35         }36     }37     38 }39 40 class Dog implements Runnable{41 42     @Override43     public void run() {44         // TODO Auto-generated method stub45         System.out.print("hello");46         47     }48     49 }