Catching a custom exception

Question

I am having an issue with my code. I have simplified it here:

public class SuperDuper {
    public static void main(String[] args) {        
        try{
            method();
        } catch(CustomException e) {
            System.out.println("Caught!");
        }
    }

    public static void method() throws Exception {
        throw new CustomException();
    }
}

where my custom exception is just:

public class CustomException extends Exception {
    public CustomException() {
        super();
    }

    public CustomException(String text) {
        super(text);
    }
}

However it is returning the following error during compile time:

SuperDuper.java:6: error: unreported exception Exception; must be caught or declared to be thrown
method();
      ^

What is it that I did wrong? If I change the catch to Exception it works, otherwise it does not.

EDIT: I see this got reported as being a duplicate but the duplicates suggested by the site were not dealing with this issue.

`method()` declares that it can throw `Exception`, so where are you handling that while calling it? Handling `CustomException` won't work. Compiler only knows about `Exception` being thrown by method. — Rohit Jain, Mar 19 '15 at 20:39

score 2 · Accepted Answer · answered Mar 19 '15 at 20:39

2

You declare that method() throws Exception, but you are catching CustomException. Change your method signature to throws CustomException. Otherwise you'd need to catch Exception, not CustomException.

answered Mar 19 '15 at 20:39

JNYRanger

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Downvoted because...? – JNYRanger Mar 19 '15 at 20:41
I didn't downvote, but it for sure was worth at the end of the day, as I upvoted it, just to smooth it out :) – Mordechai Mar 19 '15 at 20:43

score 2 · Answer 2 · answered Mar 19 '15 at 20:40

2

method() is declared as throwing Exception, so you need to catch Exception. You probably instead meant method() to look like

    public static void method() throws CustomException {
        throw new CustomException();
    }

answered Mar 19 '15 at 20:40

dcsohl

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Catching a custom exception

2 Answers2