dialogdemo.java

这是孙卫琴在"Java与面向对象编程"一书的源代码。

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

class MyDialog extends JDialog {
  private JLabel label=new JLabel("请输入姓名：");
  private JTextField textField=new JTextField(10);
  private JButton button = new JButton("OK");

  public MyDialog(JFrame parent) {
    super(parent, "提示", true);
    Container contentPane = getContentPane();
    contentPane.setLayout(new FlowLayout());
    contentPane.add(label);
    contentPane.add(textField);

    button.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        dispose(); // 关闭对话框
      }
    });
    contentPane.add(button);
    pack();
  }

  public String getText(){return textField.getText();}
}
public class DialogDemo extends JFrame {
  private JButton button = new JButton("提交");
  private MyDialog dialog = new MyDialog(this);
  private TextField textField = new TextField(10);

  public DialogDemo (String title) {
    super(title);
    textField.setEditable(false);
    button.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        dialog.setVisible(true);  //显示对话框
        textField.setText(dialog.getText());
      }
    });
    
    Container contentPane = getContentPane();
    contentPane.setLayout(new FlowLayout());
    contentPane.add(button);
    contentPane.add(textField);
    setSize(500,300);
    setVisible( true );
    setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   }

   public static void main( String args[] ){
      new DialogDemo("DialogDemo");
   }
}


/****************************************************
 * 作者：孙卫琴                                     *
 * 来源：<<Java面向对象编程>>                       *
 * 技术支持网址：www.javathinker.org                *
 ***************************************************/