JDK 中用 Thread.State 枚举表示了线程的几种状态
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线程状态转换图
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使用程序查看线程状态
创建 T 线程，然后输出此时的状态，再启动线程，利用循环，查看线程状态，只要线程没终止，就会不停的输出状态
public class ThreadState_ {
public static void main(String[] args) throws InterruptedException {
T t = new T();
System.out.println(t.getName() + " 状态 " + t.getState());
t.start();
while (Thread.State.TERMINATED != t.getState()) {
System.out.println(t.getName() + " 状态 " + t.getState());
Thread.sleep(500);
}
System.out.println(t.getName() + " 状态 " + t.getState());
}
}
class T extends Thread {
@Override
public void run() {
while (true) {
for (int i = 0; i < 5; i++) {
System.out.println("hi " + i);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
break;
}
}
}
