本文介绍了wait（）和notify（）方法，总是IllegalMonitorStateException发生，告诉我当前线程不是所有者为什么？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
package pkg_1;
public class ExpOnWaitMethod extends Thread {
static Double x = new Double(20);
public static void main(String[] args) {
ExpOnWaitMethod T1 = new ExpOnWaitMethod();
ExpOnWaitMethod T2 = new ExpOnWaitMethod();
T1.start();
T2.start();
}
public void run() {
Mag mag = new Mag();
synchronized (x) {
try {
for (int i = 1; i < 10; i++) {
mag.nop(Thread.currentThread());
x = i * 2.0;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
class Mag {
char ccc = 'A';
public void nop(Thread thr) throws InterruptedException {
System.out.print(ccc + " ");
ccc++;
if (thr.getState().toString().equalsIgnoreCase("runnable"))
Thread.currentThread().wait();
//thr.notify();
}
}
推荐答案
需要在对象上保持锁定 wait （您只能在同步块中调用它）
You need to hold the lock on the object you want to wait on (you can only call it within a synchronized block).
此外，在线程上调用 wait 非常不寻常，可能不是你想要的。
Also, calling wait on a Thread is very unusual and probably not what you want.
我不知道你想做什么，但你可能会混淆 wait sleep ？
I am not sure what you are trying to do, but could you be confusing wait with sleep?
如果你想等待另一个线程完成， code> anotherThread.join（）。
If you want to wait for another thread to finish, that would be anotherThread.join().
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