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");

}

}