Limit the number of characters in Text Components

I'm trying to limit the number of characters in text components. So I use the follow KeyListener:
private class KeyHandler extends KeyAdapter{
String oldText;
private KeyHandler(){ }
public void keyTyped(KeyEvent ev){
String newText = textField.getText();
System.out.println("Old text: " + this.oldText); //debug
System.out.println("New text: " + newText); //debug
if(newText.length() < limit){
this.oldText = newText + ev.getKeyChar();
}else{
textField.setText(this.oldText);
if(textField.getCaretPosition() + 1 > limit)
textField.setCaretPosition(limit - 1);
But the problem is that after that, the last key is typed in the component and the last key always appear.
�Does anyone know the way for consume the key presses?
Thank you

(Belongs in the Swing forum.)
The callback method keyTyped comes after keyPressed and keyReleased.
The event.consume() should consume the event.
Consider cut/copy/paste.
Maybe a addPropertyChangeListener would be better?

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Limit the number of characters in Text Components

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