Quite weird. mouseDoubleClickEvent doesn't work

Hi all. I'm using Qt4 Jambi 4.5.x and new to it . I want to override mouseDoubleClickEvent in QTextEdit widget but failed. I cannot see the log. I had searched many samples and I think my code should be OK. I don't know why my code cannot work.

Would someone kindly enough to have a look at it? Thanks in advance.

Code:

package org.langpartner.nword.view;
 
import com.trolltech.qt.gui.QApplication;
import com.trolltech.qt.gui.QMainWindow;
import com.trolltech.qt.gui.QMouseEvent;
import com.trolltech.qt.gui.QTextEdit;
 
public class TextEditTest extends   QMainWindow {
 
    private QTextEdit textEdit;        
 
    public TextEditTest() {
    	textEdit = new QTextEdit(this);
    }
 
	@Override
	protected void mouseDoubleClickEvent(QMouseEvent arg__1) {
    	System.out.println("Entered contextMenuEvent...");
	}
 
    static public void main(String args[]) {
        QApplication.initialize(args);
        TextEditTest mw = new TextEditTest();
        mw.show();
        QApplication.exec();
    }
 
}