Printing Exception Message in java

Question

Is there a way to print an exception message in Java without the exception?

When I try the following piece of code:

try {
    // statements
} catch (javax.script.ScriptException ex) {
    System.out.println(ex.getMessage());
}

The output is:

Invalid JavaScript code: sun.org.mozilla.javascript.internal.EvaluatorException:
missing } after property list (<Unknown source>) in <Unknown source>; 
at line number 1

Is there a way to print the message without the exception information, source and line number information. In other words, the message I would like to print in the output is:

missing } after property list

You can parse exception message string to get only those pieces you want — om-nom-nom
– om-nom-nom, Commented Mar 30, 2013 at 19:46
How about just using println with the message you want to output without the getMessage method? — Kakalokia
– Kakalokia, Commented Mar 30, 2013 at 19:50
You use getCause() to get the inner-most exception and getMessage() on that, but I wouldn't guarantee that the line number won't be there. It's a rather unusual usecase, can you tell what you want to do? If you just want to output a user-friendly message for a front-end, you're just gonna have to customize it, if it's meant for devs anyway -- the whole thing is much friendlier. — TC1
– TC1, Commented Mar 30, 2013 at 19:50

djangofan · Accepted Answer · 2015-09-17 23:12:18Z

25

The output looks correct to me:

Invalid JavaScript code: sun.org.mozilla.javascript.internal.EvaluatorException: missing } after property list (<Unknown source>) in <Unknown source>; at line number 1

I think Invalid Javascript code: .. is the start of the exception message.

Normally the stacktrace isn't returned with the message:

try {
    throw new RuntimeException("hu?\ntrace-line1\ntrace-line2");
} catch (Exception e) {
    System.out.println(e.getMessage()); // prints "hu?"
}

So maybe the code you are calling catches an exception and rethrows a ScriptException. In this case maybe e.getCause().getMessage() can help you.

edited Sep 17, 2015 at 23:12

djangofan

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answered Mar 30, 2013 at 19:58

micha

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Comments

Neeraj Gahlawat · Accepted Answer · 2021-10-08 11:14:59Z

3

In Java, there are three methods to print an exception information.

1. java.lang.Throwable.printStackTrace() method

e.printStackTrace();

2.toString() method :

catch (Exception e)
        {
            System.out.println(e.toString());
        }

3. java.lang.Throwable.getMessage() method

catch (Exception e)
        {
            System.out.println(e.getMessage());
              
        }

answered Oct 8, 2021 at 11:14

Neeraj Gahlawat

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Comments

user2127251 · Accepted Answer · 2013-03-30 19:52:10Z

-12

try {
} catch (javax.script.ScriptException ex) {
// System.out.println(ex.getMessage());
}

answered Mar 30, 2013 at 19:52

user2127251

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