java - 如何将参数传递给 ScheduledThreadPoolExecutor？

Question

我如何将参数传递给 ScheduledThreadPoolExecutor？

我有以下代码。您会注意到，我声明了一个变量“num”，并将其作为参数传递给 exampleFunction()。 exampleFunction 包含一个 ScheduledThreadPoolExecutor。我希望能够在 public void run() 中使用变量“num”。有什么办法可以做到这一点吗？

     class Test {
     ...
     int num;
     exampleFunction(num);
     ...

     public void exampleFunction(num) {
         ScheduledThreadPoolExecutor exec = new ScheduledThreadPoolExecutor(1);
         exec.schedule(new Runnable() {
             public void run() {
                 ...do something here...
                 ...something with 'num' here...
                 ...i get an error when i try to use 'num' here
             }
         }, 10, TimeUnit.SECONDS);
     }

}

Answer 1

您是否尝试将 exampleFunction(num) 更改为 exampleFunction(final int num)？由于 run 方法位于内部类中，因此所有外部绑定(bind)都需要是最终的。

public void exampleFunction(final int num) { // final int here
     ScheduledThreadPoolExecutor exec = new ScheduledThreadPoolExecutor(1);
     exec.schedule(new Runnable() {
         public void run() {
             ...do something here...
             ...something with 'num' here...
             ...i get an error when i try to use 'num' here
         }
     }, 10, TimeUnit.SECONDS);
 }