Java笔记15：多线程

Java实现多线程有两种方式：一是继承Thread类；二是实现Runable接口。

一、Thread实现

publicclass ThreadDemo2 {

    publicstaticvoid main(String[] args) {

        new TestThread2().start();

        inti = 0;

        while(i++ < 100) {

            System.out.println("main thread is running");

        }

    }

}



class TestThread2 extends Thread {

    publicvoid run() {

        intj = 0;

        while(j++ < 100) {

            System.out.println(Thread.currentThread().getName() + " is running!");

        }

    }

}

运行结果：

 

二、Runnable实现

publicclass ThreadDemo3 {

    publicstaticvoid main(String[] args) {

        TestThread3 t3 = new TestThread3();

        Thread t = new Thread(t3);

        t.start();

        inti = 0;

        while(i++ < 100) {

            System.out.println("main thread is running");

        }

    }

}



class TestThread3 implements Runnable {

    publicvoid run() {

        intj = 0;

        while(j++ < 100) {

            System.out.println(Thread.currentThread().getName() + " is running!");

        }

    }

}

运行结果：