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

public class JOptionPaneTest11 extends JFrame implements ActionListener{

  JLabel ansLabel;

  public static void main(String[] args){
    JOptionPaneTest11 frame = new JOptionPaneTest11();

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

  JOptionPaneTest11(){
    JButton infoButton = new JButton("Question");
    infoButton.addActionListener(this);

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

    ansLabel = new JLabel("未入力です");
    JPanel ansPanel = new JPanel();
    ansPanel.add(ansLabel);

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

  public void actionPerformed(ActionEvent e){
    String value = JOptionPane.showInputDialog(this, "お名前は？", 
      "名前の入力", JOptionPane.INFORMATION_MESSAGE);

    if (value == null){
      ansLabel.setText("取消されました");
    }else{
      ansLabel.setText(value);
    }
  }
}