Java线程Thread的基础1

一、单词的注释

mynchronized：对现在执行的程序进行上锁排序进行   Dameon：守护线程

1.public class SyncDemo4 {
    public static void main(String[] args) {
        Boo boo = new Boo();
        Thread t1 = new Thread(){
            public void run(){
                boo.mathodA();
            }
        };
        Thread t2 = new Thread(){
            public void run(){
                boo.mathodB();
            }
        };
        t1.start();
        t2.start();
    }
}
class Boo {
    public synchronized void mathodA() {
        Thread t = Thread.currentThread();
        System.out.println(t.getName() + "方法A开始执行");
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("执行完毕");
    }
//此时两个方法都被mynchronized修饰，这样会并列进行
    public  void mathodB() {
        synchronized (Boo.class){
            Thread t = Thread.currentThread();
            System.out.println(t.getName() + "方法B开始执行");
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("执行完毕");}

    }
}

2.

public class DaemonThreadDemo {
    public static void main(String[] args) {
        Thread rose = new Thread("rose"){
            public void run(){
                for(int i = 0;i<5;i++) {
                    System.out.println(getName()+"：let,me,go");
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                System.out.println("啊啊啊啊，噗通！");

            }
        };
        Thread jack = new Thread("jack"){
            public void run(){
                while (true){
                    System.out.println(getName()+"：you jump，i，jump");
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };
        rose.start();
        //守护线程必须设立在线程启动之前，setDaemon为守护线程
        jack.setDaemon(true);
        jack.start();
    }
}