public static void main(String[] args) {
ThreadGroup group = new ThreadGroup("demo");
for (int i = 0; i < 3; i++) {
new Thread(
group,
new Runnable() {
public void run() {
System.out.print("");
}
})
.start();
}
group.list();
int count = group.activeCount(); // 获得线程组中活动的线程
System.out.println(count);
Thread threads[] = new Thread[group.activeCount()];
group.enumerate(threads); // 将当前线程组中活动的线程复制到一个线程数组中去。
for (Thread thread : threads) {
System.out.println(thread.getName());
}
ThreadGroup parent = group.getParent();
parent.list();
ThreadGroup parent2 = parent.getParent();
parent2.list();
}
