在Java中无需执行程序即可调用

Question

import java.util.concurrent.Callable;
import java.io.IOException;

public class HelloWorld{

 public static void main(String []args){
    Callable<Void> callable = new Callable<Void>()
    {
        public Void call() throws IOException
        {
            return null;
        }

    };
    try
    {
        callable.call();
    }
    catch(IOException e)
    {}
 }
}

Here I get error "unreported exception Exception". I don't want to use generic exception Exception. What to do?

Answer 1

The Callable interface explicitly declares that the call() method may throw any Exception. If you use the interface, you must catch the exception.

If you aren't using executors, you might be able to define your own interface:

public interface IOTask
{
    public void call() throws IOException;
}

And instead of making a callable, make an IOTask instead.