《Java多线程编程核心技术（第2版）》 —1.2.4　执行start()的顺序不代表执行run()的顺序

1.2.4　执行start()的顺序不代表执行run()的顺序

注意，执行start()方法的顺序不代表线程启动的顺序。创建测试用的项目名称为z，MyThread.java类代码如下：

package extthread;

public class MyThread extends Thread {

    private int i;

    public MyThread(int i) {

        super();

        this.i = i;

    }

    @Override

    public void run() {

        System.out.println(i);

    }

}

运行类Test.java代码如下：

package test;

import extthread.MyThread;

public class Test {

    public static void main(String[] args) {

        MyThread t11 = new MyThread(1);

        MyThread t12 = new MyThread(2);

        MyThread t13 = new MyThread(3);

        MyThread t14 = new MyThread(4);

        MyThread t15 = new MyThread(5);

        MyThread t16 = new MyThread(6);

        MyThread t17 = new MyThread(7);

        MyThread t18 = new MyThread(8);

        MyThread t19 = new MyThread(9);

        MyThread t110 = new MyThread(10);

        MyThread t111 = new MyThread(11);

        MyThread t112 = new MyThread(12);

        MyThread t113 = new MyThread(13);

        t11.start();

        t12.start();

        t13.start();

        t14.start();

        t15.start();

        t16.start();

        t17.start();

        t18.start();

        t19.start();

        t110.start();

        t111.start();

        t112.start();

        t113.start();

    }

}

程序运行结果如图1-14所示。

使用代码：

        MyThread thread = new MyThread();

        thread.start();

启动一个线程后，JVM直接调用MyThread.java类中的run()方法。