Java之Runnable启动线程的使用方式

public class Demo {

    public static void main(String[] args) {
//        MyThread m1 = new MyThread("张三");
//        MyThread m2 = new MyThread("李四");
//
//        m1.start();
//        m2.start();

        MyRunnable1 m = new MyRunnable1();
        Thread t1 = new Thread(m,"张三");
        Thread t2 = new Thread(m,"李四");

        t1.start();
        t2.start();


    }
    public static void main1(String[] args) {
        //MyRunnable myRunnable = new MyRunnable("张三");//这种给线程命名的方式不可行
        MyRunnable myRunnable = new MyRunnable();

//        Thread t1 = new Thread(myRunnable);//将Runnable类对象传入Thread类对象的构造方法中
//        Thread t2 = new Thread(myRunnable);

        Thread t1 = new Thread(myRunnable,"张三");//通过Thread方法来设置自己线程的名字
        Thread t2 = new Thread(myRunnable,"李四");

        t1.start();
        t2.start();

    }
}

public class MyThread extends Thread {
    public MyThread(){

    }

    public MyThread(String name){
        super(name);
    }

    //int num = 50;//减少的时候是张三和李四分别减少50
    public static int num = 50;//减少的时候是张三和李四共同减少50一个数字

    @Override
    public void run() {
        while(num > 0 ){
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"：正在减---->"+(num--));
        }
    }
}

public class MyRunnable implements Runnable {
    public MyRunnable() {

    }

    public MyRunnable(String name){//我们自己写的 有参数的构造器 但是无法给我们的线程重新命名
        //Thread.currentThread().setName(name);
        //System.out.println(Thread.currentThread().getName());//这句代码是主线程执行的所以无法给子线程改名字
    }

    @Override
    public void run() {
        for (int i = 0; i < 50; i++) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"正在数--->"+i);
        }
    }
}

public class MyRunnable1 implements Runnable {

    public int num = 50;//不需要加static

    @Override
    public void run() {
        while(num > 0){
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"--->正在减"+(num--));
        }
    }
}