示例代码

public class Lesson091 {public static void main(String[] args) {//下面创建3个线程：thread1、thread2、thread3Thread thread1 = new Thread(() -> {for (int i = 0; i < 50; i++) {System.out.println(Thread.currentThread() + " " + i);}}, "thread1");Thread thread2 = new Thread(() -> {for (int i = 0; i < 50; i++) {System.out.println(Thread.currentThread() + " " + i);}}, "thread2");Thread thread3 = new Thread(() -> {for (int i = 0; i < 50; i++) {System.out.println(Thread.currentThread() + " " + i);}}, "thread3");thread1.start();thread2.start();thread3.start();}
}

idea 设置如下


效果如下，点击切换，就单独调试某个线程