How to add an event to an icon?

Question

I wanted to make it possible to open a screen, perform any action and so by clicking on an icon.

I wanted to put different formats, so I don’t use one JButton. Because when passing the image to him, he remained "rectangular". Furthermore, in case there is any component that can take the form of an image or even make with Jbutton, it is also valid.

Example click on a small circle:

package pacote01;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class NovoClass extends JFrame
{    
    private JPanel painel = new JPanel();

    public NovoClass()
    {
        setSize(200, 150);
        ImageIcon image = new ImageIcon(getClass().getResource("/imagens/icone.png"));   
        JLabel imagelabel = new JLabel(image); 

        painel.add(imagelabel);
        add(painel);   
        setVisible(true);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);      
    }

    public static void main(String[] args) {
        NovoClass novo = new NovoClass();
    }
}

Answer 1

To add a listener in a jLabel you can use the addMouseListener, passing as a parameter an implementation of MouseListener called MouseAdapter, making it over-written only in the method mouseClicked.

Below is the section responsible for this:

imagelabel.addMouseListener(new MouseAdapter() {
    public void mouseClicked(MouseEvent e) {
        System.out.println("clicou no icone");
    }
});

Below is the complete code

public class NovoClass extends JFrame {
    private JPanel painel = new JPanel();

    public NovoClass() {
        setSize(200, 150);
        ImageIcon image = new ImageIcon(getClass().getResource("/imagens/icone.png"));
        JLabel imagelabel = new JLabel(image);
        //Adiciona o mouse listener
        imagelabel.addMouseListener(getMouseListener());

        painel.add(imagelabel);
        add(painel);
        setVisible(true);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

    //Cria o mouse listener
    public MouseListener getMouseListener() {
        //Utiliza a implementação do mouseAdapter
        return new MouseAdapter() {
            //Faz a sobre-escrita apenas no click
            public void mouseClicked(MouseEvent e) {
                System.out.println("clicou no icone");
            }
        };
    }

    public static void main(String[] args) {
        NovoClass novo = new NovoClass();
    }
}