Java并发编程的艺术（一）

题目1

创建3个线程，让3个线程分别按着顺序打印AAAA，BBBB，CCCC（第一个线程打印AAAA，第二个线程打印BBBB，第一个线程始终在第二个线程之前打印）

代码（该代码为打印3个线程分别打印一次）

public class JoinTest {
    
    public static void main(String[] args) {
        Thread prev = Thread.currentThread();
        String[] array = {"AAAA","BBBBB","CCCC"};
        for(int i = 0;i<3;i++){
            Thread thread = new Thread(new MyThread(prev,array[i]),"Thread"+i);
            thread.start();
            prev = thread;
        }

    }
}

class MyThread implements Runnable{
    private Thread thread;
    private String print;
    public MyThread(Thread thread,String print){
        this.thread = thread;
        this.print = print;
    }
    
    @Override
    public void run() {
        try {
            thread.join();
            for(int i = 0;i<3;i++){
                System.out.println(print);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(Thread.currentThread().getName());
    }
    
}

运行结果

AAAA
AAAA
AAAA
Thread0

BBBB
BBBB
BBBB
Thread1

CCCC
CCCC
CCCC
Thread2

题目1 扩展

只创建3个线程，循环打印 题目1 的字符串，并且按照上题中的线程顺序打印