import javax.swing.*; import java.awt.Color; import java.awt.BorderLayout; import java.awt.event.*; public class JOptionPaneTest2 extends JFrame implements ActionListener{ public static void main(String[] args){ JOptionPaneTest2 frame = new JOptionPaneTest2(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setBounds(10, 10, 300, 200); frame.setTitle("ƒ^ƒCƒgƒ‹"); frame.setVisible(true); } JOptionPaneTest2(){ JButton button = new JButton("dialog"); button.addActionListener(this); JPanel p = new JPanel(); p.add(button); getContentPane().add(p, BorderLayout.CENTER); } public void actionPerformed(ActionEvent e){ JLabel label = new JLabel("Message"); label.setForeground(Color.RED); JOptionPane.showMessageDialog(this, label); } }