How to assert if KeyPressEvent was any keyboard character?

Question

I want to assert a com.google.gwt.event.dom.client.KeyPressEvent . It should match any characters or digits, and signs like ,.-+~ etc. Especially I want to exclude all "navigation" keys like arrows, insert, delete, pos1, end, F1-12 etc.

Why does the following not work?

KeyPressEvent keyEvent;
if (Character.isLetterOrDigit((int) keyEvent.getUnicodeCharCode()) {}

Result:

The method isLetterOrDigit(char) in the type Character is not applicable for the arguments (int)

Answer 1

Character.isLetterOrDigit(int) is only supported in Java 1.5 or newer. You may be using an older version.

Try casting to a char instead to match the method signature:

Character.isLetterOrDigit((char)keyEvent.getUnicodeCharCode())