java多线程

public class TestMitiThread {
    public static void main(String[] rags) {
        System.out.println(Thread.currentThread().getName() + " 线程运行开始!");
        new MitiSay("A").start();
        new MitiSay("B").start();
        System.out.println(Thread.currentThread().getName() + " 线程运行结束!");
    }
}
 
class MitiSay extends Thread {
    public MitiSay(String threadName) {
        super(threadName);
    }
 
    public void run() {
        System.out.println(getName() + " 线程运行开始!");
        for (int i = 0; i < 10; i++) {
            System.out.println(i + " " + getName());
            try {
                sleep((int) Math.random() * 10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println(getName() + " 线程运行结束!");
    }
}

运行结果：
 
main 线程运行开始!
main 线程运行结束!
A 线程运行开始!
0 A
1 A
B 线程运行开始!
2 A
0 B
3 A
4 A
1 B
5 A
6 A
7 A
8 A
9 A
A 线程运行结束!
2 B
3 B
4 B
5 B
6 B
7 B
8 B
9 B
B 线程运行结束!
 

public class TestMitiThread1 implements Runnable {
 
    public static void main(String[] args) {
        System.out.println(Thread.currentThread().getName() + " 线程运行开始!");
        TestMitiThread1 test = new TestMitiThread1();
        Thread thread1 = new Thread(test);
        Thread thread2 = new Thread(test);
        thread1.start();
        thread2.start();
        System.out.println(Thread.currentThread().getName() + " 线程运行结束!");
    }
 
    public void run() {
        System.out.println(Thread.currentThread().getName() + " 线程运行开始!");
        for (int i = 0; i < 10; i++) {
            System.out.println(i + " " + Thread.currentThread().getName());
            try {
                Thread.sleep((int) Math.random() * 10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println(Thread.currentThread().getName() + " 线程运行结束!");
    }
}
 

运行结果：
 
main 线程运行开始!
Thread-0 线程运行开始!
main 线程运行结束!
0 Thread-0
Thread-1 线程运行开始!
0 Thread-1
1 Thread-1
1 Thread-0
2 Thread-0
2 Thread-1
3 Thread-0
3 Thread-1
4 Thread-0
4 Thread-1
5 Thread-0
6 Thread-0
5 Thread-1
7 Thread-0
8 Thread-0
6 Thread-1
9 Thread-0
7 Thread-1
Thread-0 线程运行结束!
8 Thread-1
9 Thread-1
Thread-1 线程运行结束!