Java - 2 Imagenes en un Label

import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.event.MouseAdapter;

import javax.swing.*;

public class LabelHoverTest extends JFrame {

    Icon pic1;

    Icon pic2;

    JLabel label;

    public LabelHoverTest(String title) {

        super(title);

        pic1 = UIManager.getIcon("OptionPane.informationIcon");

        pic2 = UIManager.getIcon("OptionPane.questionIcon");

        createAndShowUI();

    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            @Override

            public void run() {

                new LabelHoverTest("Label Hover Test").setVisible(true);

            }

        });

    }

    private void createAndShowUI() {

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setResizable(false);

        addComponentsToPane(getContentPane());

        setSize(300, 300);

        setLocationRelativeTo(null);

        setVisible(true);

    }

    private void addComponentsToPane(Container contentPane) {

        label = new JLabel(pic1);

        contentPane.add(label, BorderLayout.CENTER);

        label.addMouseListener(new MouseAdapter() {

            @Override

            public void mouseEntered(java.awt.event.MouseEvent evt) {

                label.setIcon(pic2);

            }

            @Override

            public void mouseExited(java.awt.event.MouseEvent evt) {

                label.setIcon(pic1);

            }

        });

    }

}