Q:

How to change a picture after pressing on it using MouseListener?

My Images are in  JLabels and they follow a MouseListener but I don't know what to add in the mousePressed(Event e) method to change the JLabel with another image ?? 

A:

JLabel has setIcon() method. You can use it to change the picture your label shows.
For example:
JLabel myLabel = new JLabel(imageOne);
myLabel.addMouseListener(new MouseAdaper() {
    public void mousePressed(MouseEvent e) {
        ImageIcon image2 = new ImageIcon("image2.png");
        myLabel.setIcon(image2);
    }
});

