写的时候有点懵 不看之前的还真记不住

通过实现Runnable接口的方式创建线程类Cat和Dog

Cat类实现Runnable接口

//1、实现Runnable接口 implements Runnable
package com.lding.runnable;

public class Cat implements Runnable{
   //重写 Runnable中的run方法
    @Override
    public void run() {
        for(int i=1;i<=3;i++)
        System.out.println(Thread.currentThread().getName()+"A cat");
    }
}

Dog类实现Runnable接口

//实现Runnable接口 implements Runnable
package com.lding.runnable;

public class Dog implements Runnable{

    @Override
    public void run() {
        for(int i=1;i<=3;i++)
        System.out.println(Thread.currentThread().getName()+"A dog");
    }
}

Test类

测试类中分别创建Cat和Dog类的对象，启动两个线程
创建两个实现了Runnable接口的类的对象
1、Cat cat1=new Cat();
2、Dog dog1=new Dog();
3、定义Thread 对象 来启动线程

​package com.lding.runnable;

public class AnimalTest {
    public static void main(String[] args) {
        Cat cat1=new Cat();
        Dog dog1=new Dog();
        Thread mt1=new Thread(cat1);
        Thread mt2=new Thread(dog1);
        mt1.start();
        mt2.start();
        for(int i=1;i<=3;i++){
            System.out.println("main thread");
        }
    }
}