JAVA 两种方法实现多线程（继承Thread和实现Runnable接口）

package h14;

public class Demo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Thread cat = new Cat();
        cat.start();
        Runnable dog = new Dog();
        Thread t = new Thread(dog);
        t.start();
    }

}

class Cat extends Thread{

    @Override
    public void run() {
        // TODO Auto-generated method stub
        super.run();
        int i = 0;
        while(true){
            try {
                i++;
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println(i);
        }
    }
    
}

class Dog implements Runnable{

    @Override
    public void run() {
        // TODO Auto-generated method stub
        System.out.print("hello");
        
    }
    
}