如何在Swing中創建模態對話框？

下麵的示例展示了如何在基於swing的應用程式中創建模態對話框。

使用以下API -

• JDialog() - 創建標準對話框。
• JDialog.getContentPane() - 獲取對話框的內容面板。
• Dialog.ModalityType.DOCUMENT_MODAL - 將對話框顯示為模式對話框。

示例

package com.zaixian.swingdemo;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dialog;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class SwingTester {
   public static void main(String[] args) {
      createWindow();
   }

   private static void createWindow() {
      JFrame frame = new JFrame("Swing創建模態對話框");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      createUI(frame);
      frame.setSize(560, 200);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
   }

   private static void createUI(final JFrame frame){
      JPanel panel = new JPanel();
      LayoutManager layout = new FlowLayout();
      panel.setLayout(layout);

      JButton button = new JButton("點擊這裏開始~");
      final JDialog modelDialog = createDialog(frame);
      button.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
            modelDialog.setVisible(true);
         }
      });

      panel.add(button);
      frame.getContentPane().add(panel, BorderLayout.CENTER);
   }

   private static JDialog createDialog(final JFrame frame){
      final JDialog modelDialog = new JDialog(frame, "Swing創建模態對話框",
         Dialog.ModalityType.DOCUMENT_MODAL);
      modelDialog.setBounds(132, 132, 300, 200);
      Container dialogContainer = modelDialog.getContentPane();
      dialogContainer.setLayout(new BorderLayout());
      dialogContainer.add(new JLabel("歡迎您學習Java/Swing!")
      , BorderLayout.CENTER);
      JPanel panel1 = new JPanel();
      panel1.setLayout(new FlowLayout());
      JButton okButton = new JButton("確定");
      okButton.addActionListener(new ActionListener() {
         @Override
         public void actionPerformed(ActionEvent e) {
            modelDialog.setVisible(false);
         }
      });

      panel1.add(okButton);
      dialogContainer.add(panel1, BorderLayout.SOUTH);

      return modelDialog;
   }
}

執行上面示例代碼，得到以下結果：