Java多线程的几种实现方式

1、继承Thread类

public class MultiThread {
    public static void main(String[] args) {
        System.out.println(Thread.currentThread().getName() + "线程开始运行...");
        MultiSayThread t1 = new MultiSayThread("A");
        MultiSayThread t2 = new MultiSayThread("B");
        t1.start();
        t2.start();
        System.out.println(Thread.currentThread().getName() + "线程結束运行...");
    }
}

class MultiSayThread extends Thread {
    public MultiSayThread(String threadName) {
        super(threadName);
    }

    public void run() {
        System.out.println(getName() + "线程运行开始...");

        for (int i = 0; i < 10; i++) {
            try {
                System.out.println(i + " " + getName());
                sleep((int) Math.random() * 10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        System.out.println(getName() + "线程运行结束...");
    }
}

 程序运行结果：

main线程开始运行...
main线程結束运行...
A线程运行开始...
B线程运行开始...
0 A
0 B
1 B
1 A
2 B
2 A
3 B
3 A
4 B
4 A
5 B
5 A
6 B
6 A
7 B
7 A
8 B
8 A
9 B
9 A
B线程运行结束...
A线程运行结束...

 

2、实现Runnable

package com.huawei.testthread;

public class MultiRunnable {
    public static void main(String[] args) {
        System.out.println(Thread.currentThread().getName() + "线程开始运行...");
        MultiSaidThread r1 = new MultiSaidThread();
        MultiSaidThread r2 = new MultiSaidThread();
        Thread t1 = new Thread(r1, "A");
        Thread t2 = new Thread(r2, "B");
        t1.start();
        t2.start();
        System.out.println(Thread.currentThread().getName() + "线程结束运行...");
    }
}

class MultiSaidThread implements Runnable {
    public void run() {
        System.out.println(Thread.currentThread().getName() + "线程开始运行...");

        for (int i = 0; i < 10; i++) {
            try {
                System.out.println(i + " " + Thread.currentThread().getName());
                Thread.sleep((int) Math.random() * 10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        System.out.println(Thread.currentThread().getName() + "线程结束运行...");
    }
}

程序运行结果：

main线程开始运行...
main线程结束运行...
A线程开始运行...
0 A
1 A
2 A
3 A
4 A
5 A
6 A
7 A
8 A
9 A
A线程结束运行...
B线程开始运行...
0 B
1 B
2 B
3 B
4 B
5 B
6 B
7 B
8 B
9 B
B线程结束运行...