1.继承Thread

2.实现Runnable接口

   

public class MyRunnable implements Runnable {    @Override    public void run() {        // TODO Auto-generated method stub      System.out.println("running..");    }}

public class Run {    public static void main(String[] args) {        Runnable runnable =new MyRunnable();        Thread thread = new Thread(runnable);        thread.start();    }}

 

  如果同时继承Thread类实现Runnable接口,实际执行的Thread的run方法

public class ThreadTest {    public static void main(String[] args) {        for (int i = 0; i < 100; i++) {            System.out.println(Thread.currentThread().getName() + " " + i);            if (i == 30) {                Runnable myRunnable = new MyRunnable();                Thread thread = new MyThread(myRunnable);                thread.start();            }        }    }}class MyRunnable implements Runnable {    private int i = 0;    @Override    public void run() {        System.out.println("in MyRunnable run");        for (i = 0; i < 100; i++) {            System.out.println(Thread.currentThread().getName() + " " + i);        }    }}class MyThread extends Thread {    private int i = 0;    public MyThread(Runnable runnable){        super(runnable);    }    @Override    public void run() {        System.out.println("in MyThread run");        for (i = 0; i < 100; i++) {            System.out.println(Thread.currentThread().getName() + " " + i);        }    }}