通过代码示例了解submit与execute的区别

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
 
public class ThreadExceptionTest {
  public static void main(String[] args) {
    ExecutorService executor = Executors.newCachedThreadPool();
    
    Future<Boolean> future = executor.submit(new CallableTask());
    try {
      future.get();
    } catch (InterruptedException e) {
      e.printStackTrace();
    } catch (ExecutionException e) {
      e.printStackTrace();
    }
    
    executor.shutdown();//必须不能忘，否则会一致卡在那里
  }
}
 
class CallableTask implements Callable<Boolean>{
  public Boolean call() throws Exception {
//    InputStream in = new FileInputStream(new File("xx.pdf"));
    int num = 3/0;
    return false;
  }
  
}

java.util.concurrent.ExecutionException: java.lang.ArithmeticException: / by zero
  at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
  at java.util.concurrent.FutureTask.get(FutureTask.java:83)
  at my.ThreadExceptionTest.main(ThreadExceptionTest.java:21)
Caused by: java.lang.ArithmeticException: / by zero
  at my.CallableTask.call(ThreadExceptionTest.java:57)
  at my.CallableTask.call(ThreadExceptionTest.java:1)
  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
  at java.util.concurrent.FutureTask.run(FutureTask.java:138)
  at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
  at java.lang.Thread.run(Thread.java:619)