java: swing 写一个简单的Multi Document Interface (MDI)

 

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/**  * encoding: utf-8  * 版权所有 2025 涂聚文有限公司  * 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎  * 描述：  * # Author    : geovindu,Geovin Du 涂聚文.  * # IDE       : IntelliJ IDEA 2023.1 Java 17  * # Datetime  : 2025 - 2025/2/8 - 22:36  * # User      : geovindu  * # Product   : IntelliJ IDEA  * # Project   : javaWeather  * # File      : MDIApplication.java  类  * # explain   : 学习  **/   package UI; import javax.swing.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;   /**  *主窗口：  */ public class MDIApplication extends JFrame {       /**      * 用于承载子窗口的桌面面板      */     private JDesktopPane desktopPane; //       /**      * 设置窗口      */     public MDIApplication() {           // 设置窗口标题         setTitle("Multi Document Interface (MDI) 示例");         setSize(800, 600); // 设置窗口大小         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 关闭窗口时退出程序         setLocationRelativeTo(null); // 窗口居中           // 创建桌面面板         desktopPane = new JDesktopPane();         setContentPane(desktopPane);           // 创建菜单栏         createMenuBar();           // 显示窗口         setVisible(true);     }       /**      * 创建菜单栏      */     private void createMenuBar() {         JMenuBar menuBar = new JMenuBar();           // 文件菜单         JMenu fileMenu = new JMenu("文件");         JMenuItem newWindowItem = new JMenuItem("新建子窗口");         JMenuItem exitItem = new JMenuItem("退出");           // 新建子窗口菜单项的事件监听器         newWindowItem.addActionListener(new ActionListener() {             @Override             public void actionPerformed(ActionEvent e) {                 createInternalFrame();             }         });           // 退出菜单项的事件监听器         exitItem.addActionListener(new ActionListener() {             @Override             public void actionPerformed(ActionEvent e) {                 System.exit(0);             }         });           fileMenu.add(newWindowItem);         fileMenu.addSeparator(); // 添加分隔线         fileMenu.add(exitItem);           // 窗口菜单         JMenu windowMenu = new JMenu("窗口");         JMenuItem cascadeItem = new JMenuItem("层叠");         JMenuItem tileItem = new JMenuItem("平铺");           // 层叠子窗口菜单项的事件监听器         cascadeItem.addActionListener(new ActionListener() {             @Override             public void actionPerformed(ActionEvent e) {                 cascadeInternalFrames();             }         });           // 平铺子窗口菜单项的事件监听器         tileItem.addActionListener(new ActionListener() {             @Override             public void actionPerformed(ActionEvent e) {                 tileInternalFrames();             }         });           windowMenu.add(cascadeItem);         windowMenu.add(tileItem);           // 将菜单添加到菜单栏         menuBar.add(fileMenu);         menuBar.add(windowMenu);           // 设置菜单栏         setJMenuBar(menuBar);     }       /**      * 创建子窗口      */     private void createInternalFrame() {         JInternalFrame internalFrame = new JInternalFrame("子窗口 " + (desktopPane.getAllFrames().length + 1),                 true, true, true, true);         internalFrame.setSize(300, 200);         internalFrame.setLocation(desktopPane.getAllFrames().length * 20, desktopPane.getAllFrames().length * 20);         internalFrame.setVisible(true);           // 将子窗口添加到桌面面板         desktopPane.add(internalFrame);     }       /**      * 层叠子窗口      */     private void cascadeInternalFrames() {         JInternalFrame[] frames = desktopPane.getAllFrames();         int x = 0;         int y = 0;         for (JInternalFrame frame : frames) {             frame.setLocation(x, y);             x += 20;             y += 20;         }     }       /**      * 平铺子窗口      */     private void tileInternalFrames() {         JInternalFrame[] frames = desktopPane.getAllFrames();         if (frames.length == 0) return;           int rows = (int) Math.sqrt(frames.length);         int cols = (int) Math.ceil((double) frames.length / rows);         int width = desktopPane.getWidth() / cols;         int height = desktopPane.getHeight() / rows;           int x = 0;         int y = 0;         for (JInternalFrame frame : frames) {             frame.setSize(width, height);             frame.setLocation(x, y);             x += width;             if (x >= desktopPane.getWidth()) {                 x = 0;                 y += height;             }         }     }   }

　　

调用：

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import UI.MDIApplication;; import java.awt.*; import javax.swing.*;     public class Main {     public static void main(String[] args) {             // 在事件调度线程中创建和显示 GUI         SwingUtilities.invokeLater(new Runnable() {             @Override             public void run() {                 //new TextSaverGUI();                 new MDIApplication();             }         }); } }