import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JTextArea;
import javax.swing.text.JTextComponent;
import javax.swing.text.Keymap;
public class Main {
public static void main(String[] argv) throws Exception {
JTextArea component = new JTextArea();
Action defAction = findDefaultAction(component);
component.getKeymap().setDefaultAction(new MyDefaultAction(defAction));
}
public static Action findDefaultAction(JTextComponent c) {
Keymap kmap = c.getKeymap();
if (kmap.getDefaultAction() != null) {
return kmap.getDefaultAction();
}
kmap = kmap.getResolveParent();
while (kmap != null) {
if (kmap.getDefaultAction() != null) {
return kmap.getDefaultAction();
}
kmap = kmap.getResolveParent();
}
return null;
}
}
class MyDefaultAction extends AbstractAction {
Action defAction;
public MyDefaultAction(Action a) {
super("My Default Action");
defAction = a;
}
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand() != null) {
String command = e.getActionCommand();
if (command != null) {
command = command.toUpperCase();
}
e = new ActionEvent(e.getSource(), e.getID(), command, e.getModifiers());
}
if (defAction != null) {
defAction.actionPerformed(e);
}
}
}
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