Java 多线程 创建 Thread Runnable

一、Thread

1、继承Thread

2、重写run方法(线体替)

3、实例化创建的线程类

4、运行 对象.start()

5、其他方法

a、获取/设置线程名

// 获取线程名
Thread.currentThread().getName()

设置

对象.setName(String类型)

b、线程休眠

Thread.sleep(Long类型)

c、设置/获取优先级(基本上没效果)

thread2.setPriority(10);

c、设置守护线程

// 守护线程
thread2.setDaemon(true);

6、案例

package com.wt.thread;

public class Demon01Thread extends Thread {
    @Override
    public void run() {
        for (int i = 0; i < 10; i++) {
            System.out.println(Thread.currentThread().getName()+"：执行线程..."+i);
            try {
                Thread.sleep(1L);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
    }
}

 

package com.wt.thread;

public class Demon01 {
    public static void main(String[] args) {
        Demon01Thread thread1 = new Demon01Thread();
        // 设置线程名
        thread1.setName("西门");
        // 设置优先级
        thread1.setPriority(1);
        thread1.start();
        Demon01Thread thread2 = new Demon01Thread();
        thread2.setName("东方");
        thread2.setPriority(10);
        // 守护线程
        thread2.setDaemon(true);
        thread2.start();

        for (int i = 0; i < 100; i++) {
            System.out.println(Thread.currentThread().getName()+"：执行主线程"+i);
        }
    }
}

二、Runnable

1、定义类实现 Runnable

2、重写run方法(逻辑)

3、实例化  定义类

4、Thread thread = new Thread(实例化定义的类)

5、开启线程 thread.start()

package com.wt.thread;

public class Demon02Run implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println(Thread.currentThread().getName()+"执行线程"+i);
        }
    }
}

package com.wt.thread;

public class Demon02Thread extends Thread {
    @Override
    public void run() {
        for (int i = 0; i < 10; i++) {
            System.out.println(Thread.currentThread().getName()+"执行线程"+i);
        }
    }
}

package com.wt.thread;

public class Demon02 {
    public static void main(String[] args) {
        Demon01Thread thread = new Demon01Thread();
        // 设置线程名
        thread.setName("A");
        // 设置守护线程
        thread.setDaemon(true);
        // 开启线程
        thread.start();
        Demon02Run demon02Run = new Demon02Run();
        Thread thread1 = new Thread(demon02Run);
        thread1.setName("B");
        thread1.start();
    }
}

三、匿名内部类

package com.wt.thread;

public class Demon03 {
    public static void main(String[] args) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < 10; i++) {
                    System.out.println(Thread.currentThread().getName()+"执行线程"+i);
                }
            }
        }, "test").start();

        for (int i = 0; i < 20; i++) {
            System.out.println(Thread.currentThread().getName()+"执行"+i);
        }
    }
}