Difference Between Throw and Throws.

[Mahi Ranga]

Hi,

what is the difference between throw and throws? and when can i use throw and when can i use throws.
Please tell me.
Advanced thanks for your Answer.

Regards,
MahiRanga.

[James Hodgkiss]

Hiya MahiRanga,

private void checkString(String s) throws Exception {
    if (s == null) {
        throw new Exception("String was null!");
    }
    else {
        System.out.println("String OK: " + s);
    }
}

Hope that helps!

Cheers,
James

[Stephan van Hulst]

You use throws in a method signature to indicate that a method is capable of throwing a particular exception. Any code calling this method will have to deal with the possibility that that particular exception can occur.

The throw keyword is used to actually throw an exception. It can be used wherever you can place a statement.

[eta]

In James' above example, any code that calls checkString() will have to deal with the fact that it *can* throw an exception, and checkString() actually throws an exception if the argument is null.

[fred rosenberger]

"throw" is a command. "Mahi, throw the ball". I am telling you to do something.

"throws" is used to describe something. "Mahi throws a curveball, a fastball, and a slider". I'm telling someone what you can do (or will potentially do in the future).

In java, 'throws' is used to tell the compiler what kind of exceptions a method might pass back up to the caller.

"throw" is used to tell the JVM "hey, you need to send this up to the caller NOW".

[Campbell Ritchie]

To the Batmobile . . . er . . . Java™ Tutorials!

[Vas Miriyala]

Nice explanation guys,thanks for all your answers.

[Campbell Ritchie]

You're welcome