创建线程

• 继承Thread类
• 实现Runnable接口

（1）继承Thread类

package Thread;public class MyThread extends Thread{@Overridepublic void run(){super.run();System.out.println("MyThread");}
}public static void main (String[] args){MyThread myThread = new MyThread();myThread.start();//耗时大System.out.println("运行结束！");}------------------
运行结束！
MyThread
-------------------

线程的执行先后跟代码执行顺序无关

 public static void main (String[] args){MyThread myThread = new MyThread();myThread.start();//耗时大Thread.sleep(200);System.out.println("运行结束！");}
------------------
MyThread
运行结束！
-------------------

（2）实现Runnable接口

创建的线程类已经有一个父类了，就不能在继承Thread类，因为java不支持多继承
就只能实现Runnable接口

package
public class MyRunnable implements Runnable{@Overridepublic void run(){System.out.println("运行中");}
}public static void main (String[] args){Runnable runnable = new MyRunnable();Thread thread = new Thread(runnable); thread.start();//耗时大System.out.println("运行结束！");}
------------------
运行结束！
运行中
-------------------