Thread.interrupt 上的 IllegalThreadStateException

Question

我有一个java程序，编译需要很长时间。

出于测试目的，如果编译时间较长，我想终止程序并重新启动它。

这是我的代码的简化版本：

public class Main {

    public static void main(String[] args) {
        Thread foo = new Thread(new Foo());
        while (true) {
            foo.start();
            while (true) {
                if (needRestart()) {
                    foo.interrupt();
                    break;
                }
            }
        }
    }

}

foo.java 看起来有点像这样：

public class Foo implements Runnable {
    // some code
    public void run () {
        try {
            while (!Thread.currentThread().isInterrupted()) {
                // some code
            }
        } catch(InterruptedException ex) {
            Thread.currentThread().interrupt();
        }       
    }
}

问题是程序崩溃并抛出 IllegalThreadStateException

如果你需要完整的代码，这里是：full code

Answer 1

不要在 while(true) 循环中启动 foo 线程。 Thread 在其生命周期中只能启动一次。

将foo.start();移到while(true)

上方

参考有关 Thread class start() 方法的 oracle 文档页面

public void start()

Causes this thread to begin execution; the Java Virtual Machine calls the run method of this thread.

The result is that two threads are running concurrently: the current thread (which returns from the call to the start method) and the other thread (which executes its run method).

It is never legal to start a thread more than once. In particular, a thread may not be restarted once it has completed execution.

Answer 2

IllegalThreadStateException 当您尝试更改线程的状态或当您尝试在同一线程处于运行状态时再次调用 start 方法时发生。但是在你的情况下，如果你想中断你的线程，让它进入 sleep() 并且当你希望你在该线程自动退出睡眠之前中断调用 notify()。

Thread.interrupt 上的 IllegalThreadStateException

IllegalThreadStateException on Thread.interrupt

java

multithreading

interrupt

thread-state

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