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

public class JOptionPaneTest7 extends JFrame implements ActionListener{

  JLabel ansLabel;

  public static void main(String[] args){
    JOptionPaneTest7 frame = new JOptionPaneTest7();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("タイトル");
    frame.setVisible(true);
  }

  JOptionPaneTest7(){
    JButton infoButton = new JButton("Question");
    infoButton.addActionListener(this);

    JPanel p = new JPanel();
    p.add(infoButton);

    ansLabel = new JLabel("未選択です");
    JPanel ansPanel = new JPanel();
    ansPanel.add(ansLabel);

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

  public void actionPerformed(ActionEvent e){
    int option = JOptionPane.showConfirmDialog(this, "実行しますか？",
      "最終確認", JOptionPane.YES_NO_OPTION, 
      JOptionPane.WARNING_MESSAGE);

    if (option == JOptionPane.YES_OPTION){
      ansLabel.setText("実行しました");
    }else if (option == JOptionPane.NO_OPTION){
      ansLabel.setText("実行は中止しました");
    }
  }
}