java24.线程------实现

1.java中，线程的实现有2种：

1、继承Thread类

1.Thread类是在java.lang包中定义的，继承Thread类必须重写run()方法
2.定义格式：
class className extends Thread{
run(){ };
}
3.示例：
实现线程的并发执行：
MyThread类：

package com.jikexueyuan.thread;public class MyThread extends Thread {    private String name;    public MyThread(String name) {        this.name = name;    }    public void run() {        for (int i = 0; i < 100; i++) {            System.out.println(name + ":" + i);        }        super.run();    }}

调用MyThread类

public class ThreadDemo01 {    public static void main(String[] args) {        MyThread t1 = new MyThread("A");        MyThread t2 = new MyThread("B");        // t1.run();        // t2.run();        // 线程的启动是通过start();        t1.start();        t2.start();    }}

运行结果：

两线程AB是并发执行的！

2、实现Runnable接口

1.都需要复写run();
2.示例：
实现runnable：

public class MyRunnable implements Runnable {    private String name;    public MyRunnable(String name) {        this.name = name;    }    public void run() {        for (int i = 0; i < 100; i++) {            System.out.println(name + ":" + i);        }    }}

调用：

public class ThreadDemo01 {    public static void main(String[] args) {        MyRunnable r1 = new MyRunnable("A");        MyRunnable r2 = new MyRunnable("B");        // runnable接口不可能存在启动方法，需要通过thread来启动        Thread t1 = new Thread(r1);        Thread t2 = new Thread(r2);        t1.start();        t2.start();    }}

运行结果：

并发执行