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Copy pathTestThreadGroup.java
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49 lines (43 loc) · 1.81 KB
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package ThreadGroup;
/*
线程组，把多个线程组合到一起
它可以对一批线程进行分类管理，java允许程序直接对线程进行控制
* */
public class TestThreadGroup {
public static void main(String[] args) {
// method1();
method2();
}
public static void method1() {
MyRunnable m1 = new MyRunnable();
Thread t1 = new Thread(m1);
Thread t2 = new Thread(m1);
//返回该线程所属的线程组
ThreadGroup threadGroup1 = t1.getThreadGroup();
ThreadGroup threadGroup2 = t2.getThreadGroup();
//getName，返回该线程名称
System.out.println(threadGroup1.getName());
System.out.println(threadGroup2.getName());
//线程默认情况下属于main线程组
//默认情况下，所有的线程都属于同一个线程组
//如何修改线程所在的线程组
}
public static void method2() {
ThreadGroup tg = new ThreadGroup("这是一个新的线程组");
MyRunnable m1 = new MyRunnable();
Thread t1 = new Thread(tg,m1,"线程一");
Thread t2 = new Thread(tg,m1,"线程二");
//返回该线程所属的线程组
ThreadGroup threadGroup1 = t1.getThreadGroup();
ThreadGroup threadGroup2 = t2.getThreadGroup();
//getName，返回该线程名称
System.out.println(threadGroup1.getName());
System.out.println(threadGroup2.getName());
//线程默认情况下属于main线程组
//默认情况下，所有的线程都属于同一个线程组
//如何修改线程所在的线程组
// 创建一个线程组
// 创建其他线程的时候，把其他线程组指定为我们新建的线程组
tg.setDaemon(true);//通过组名称设置后台线程，表示该组线程都是后台线程
}
}