java – 如何取消SwingWorker的执行？

目前我有两个SwingWorker线程在后台工作.如果发生异常,该方法将停止工作,但该线程仍然运行.

如果发生异常,我如何停止执行并杀死doInBackground()的线程？

this.cancel(true)不要销毁/关闭线程.我怎样才能做到这一点？

@Override
protected Boolean doInBackground() throws Exception {
        try {
            while (true) {
                //some code here                   
                return true;
            }
        } catch (Exception e) {       
            this.cancel(true); //<-- this not cancel the thread               
            return false;
        }
    }

我在Netbeans的调试中看到了这些线程.

'AWT-EventQueue-0' em execução
'AWT-Windows' em execução
'SwingWorker-pool-1-thread-1' em execução
'SwingWorker-pool-1-thread-2' em execução

//*em execução = in execution

解决方法

默认情况下,SwingWorker重用工作线程,因此,即使doInBackground()已返回,仍然可以看到执行方法的线程,这是完全正常的.

您可以通过查看NetBeans报告的线程名称来识别此事实：SwingWorker-pool-1-thread-1,其中该池由SwingWorker管理.

如果需要更多控制,还可以将SwingWorker实例传递给Executor.

只需查看SwingWorker和Executor javadoc以获取更多信息.

此外,SwingWorker.cancel()不应该从doInBackground()调用,而是从另一个线程调用,通常是EDT,例如：当用户单击进度对话框中的“取消”按钮时.