java - 启动线程时出现非法线程状态异常

Question

我试图创建 4 个线程并给它们分配任务。但是我不断收到 IllegalThreadStateException。我在这里隐藏了问题，但似乎没有人帮助我。下面是关键代码片段:

Sorter worker1 = new Sorter(theView,1);
Sorter worker2 = new Sorter(theView,2);
Sorter worker3 = new Sorter(theView,3);
Sorter worker4 = new Sorter(theView,4);

for(int nextTask=0 ; nextTask<List_of_FileContentsLists.size() ; nextTask++){
    if(worker1.busy == false){
        worker1.acquireTask(List_of_FileContentsLists.get(nextTask),fileList[nextTask]);
        worker1.start();
    }
    else if(worker2.busy == false){
        worker2.acquireTask(List_of_FileContentsLists.get(nextTask),fileList[nextTask]);
        worker2.start();
    }
    else if(worker3.busy == false){
        worker3.acquireTask(List_of_FileContentsLists.get(nextTask),fileList[nextTask]);
        worker3.start();
    }
    else if(worker4.busy == false){
        worker4.acquireTask(List_of_FileContentsLists.get(nextTask),fileList[nextTask]);
        worker4.start();
    }
    else{
        nextTask--;
    }
}

提前致谢!

Answer 1

对于您启动一次的每个 worker，您不能像在循环中那样重复启动它。我希望 WorkerN 代表不同的线程。

当您尝试将线程的状态更改为不允许的状态时，会出现 IllegalThreadState。如需更多引用，请查看 javadoc:

https://docs.oracle.com/javase/7/docs/api/java/lang/IllegalThreadStateException.html