When and why does an EventHandler require objects to be final?
Posted
by Michiel Borkent
on Stack Overflow
See other posts from Stack Overflow
or by Michiel Borkent
Published on 2010-05-11T08:37:51Z
Indexed on
2010/05/11
8:44 UTC
Read the original article
Hit count: 193
I have the following code from a GWT Project that is part of the onModuleLoad() method (similar to Java's main method, if you don't know GWT):
final TextBox t1 = new TextBox();
final Label lt1 = new Label();
t1.addKeyUpHandler(new KeyUpHandler() {
@Override
public void onKeyUp(KeyUpEvent event) {
// TODO Auto-generated method stub
if (!(t1.getText().matches("\\w{2}-\\w{2}-\\w{2}")))
lt1.setText("Invalid.");
else
lt1.setText("OK.");
}
});
Why do the two local variables have to be final here?
© Stack Overflow or respective owner
