import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.*;

public class JOptionPaneTest3 extends JFrame implements ActionListener{

  public static void main(String[] args){
    JOptionPaneTest3 frame = new JOptionPaneTest3();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("ƒ^ƒCƒgƒ‹");
    frame.setVisible(true);
  }

  JOptionPaneTest3(){
    JButton errButton = new JButton("Error");
    errButton.addActionListener(this);
    errButton.setActionCommand("Error");

    JButton infoButton = new JButton("Info");
    infoButton.addActionListener(this);
    infoButton.setActionCommand("Info");

    JButton warnButton = new JButton("Warn");
    warnButton.addActionListener(this);
    warnButton.setActionCommand("Warn");

    JButton quesButton = new JButton("Ques");
    quesButton.addActionListener(this);
    quesButton.setActionCommand("Ques");

    JButton plainButton = new JButton("Plain");
    plainButton.addActionListener(this);
    plainButton.setActionCommand("Plain");

    JPanel p = new JPanel();
    p.add(errButton);
    p.add(infoButton);
    p.add(warnButton);
    p.add(quesButton);
    p.add(plainButton);

    getContentPane().add(p, BorderLayout.CENTER);
  }

  public void actionPerformed(ActionEvent e){
    String cmd = e.getActionCommand();

    if (cmd.equals("Error")){
      JOptionPane.showMessageDialog(this, "ERROR_MESSAGE", "Error",
        JOptionPane.ERROR_MESSAGE);
    }else if (cmd.equals("Info")){
      JOptionPane.showMessageDialog(this, "INFORMATION_MESSAGE", "Info",
        JOptionPane.INFORMATION_MESSAGE);
    }else if (cmd.equals("Warn")){
      JOptionPane.showMessageDialog(this, "WARNING_MESSAGE", "Warn",
        JOptionPane.WARNING_MESSAGE);
    }else if (cmd.equals("Ques")){
      JOptionPane.showMessageDialog(this, "QUESTION_MESSAGE", "Ques",
        JOptionPane.QUESTION_MESSAGE);
    }else if (cmd.equals("Plain")){
      JOptionPane.showMessageDialog(this, "PLAIN_MESSAGE", "Plain",
        JOptionPane.PLAIN_MESSAGE);
    }
  }
}