Java笔记（六）多线程

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线程

/** *实现线程的第一种方法 *继承线程  *重写run方法 */public class ThreadDemo extends Thread{    //重写run方法    @Override    public void run() {        for(int i = 0;i < 5;i++){            try {                //休眠2秒                Thread.sleep(2000);            } catch (InterruptedException e) {                e.printStackTrace();            }            System.out.println(i);        }    }    public static void main(String[] args) {        //运行线程只需要两步        //1：new一个线程        ThreadDemo t = new ThreadDemo();        //2：运行线程        t.start();    }}

实现接口Runnable

/** * 实现接口Runnable * implements Runnable */public class ThreadDemo4 implements Runnable{    //重写run方法    @Override    public void run() {        for(int i = 0;i < 5;i++){            try {                Thread.sleep(2000);            } catch (InterruptedException e) {                e.printStackTrace();            }            System.out.println(i);        }    }    public static void main(String[] args) {        ThreadDemo4 demo4 = new ThreadDemo4();        new Thread(demo4).start();    }}

匿名内部类创建多线程

public class ThreadDemo3 {    public static void anonymity(){        //匿名内部类        Thread t = new Thread(new Runnable(){            @Override            public void run() {                for (int i = 0; i < 5; i++) {                    try {                        Thread.sleep(2000);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }        System.out.println(Thread.currentThread().getName()+","+i);        //              System.out.println(i);                }            }        });        t.start();    }

外部类创建多线程

    //外部类    static class InnerDemo3 implements Runnable{        @Override        public void run() {            for(int i = 0;i < 5;i++){                try {                    Thread.sleep(1000);                } catch (InterruptedException e) {                    e.printStackTrace();                }                System.out.println(i);            }        }    }    public static void exterior(){        InnerDemo3 id = new InnerDemo3();        Thread t = new Thread(id);        t.start();    }

匿名内部类和外部类的主方法

    public static void main(String[] args) {        anonymity();        exterior();    }}

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