5

我在 NetBeans 中创建了一个 Java 应用程序（项目），其中我设计了一个JFrame带有菜单栏的和不同的JPanels. 我希望这些JPanels出现在JFrame不同菜单项的 on 操作中，因此每当单击菜单项时，JPanels应该在JFrame. 我已经分别设计了两者JFrame，JPanel但我无法将它们链接在一起。

请朋友们帮帮我。

4

7 回答 7

5

您可以为此使用卡片布局。卡片布局可以包含许多组件（在您的情况下为 JPanel），您可以在它们之间切换。在 netbeans 调色板中添加卡片布局很容易。

文件：

http://java.sun.com/j2se/1.4.2/docs/api/java/awt/CardLayout.html

于 2009-01-30T12:00:29.317 回答
3

从您的一条评论中可以看出，您希望在单击按钮时动态创建 JPanel。如果是这种情况，那么 CardLayout 并不理想。自己实现同样的效果相对容易。代码将如下所示：

public void actionPerformed(ActionEvent event) {
    Container contentPane = frame.getContentPane();
    contentPane.removeAll();
    contentPane.add(new YourPanel());
    contentPane.invalidate();
    contentPane.repaint();
}

假设更换面板是框架中的唯一组件。如果不是，则将带有 BorderLayout 的 JPanel 添加到 Matisse 的内容窗格中，然后将新面板添加到该内容窗格中，而不是内容窗格中。

于 2009-05-10T11:54:01.517 回答
1

Matisse GUI 构建器对“JTabbedPane”控件有很好的支持，如果那是您正在寻找的。您可以将 TabbedPane 容器拖到表单中，然后将其他容器拖到其上以创建新选项卡。

如果您正在寻找更高级的行为，例如当用户按下不同的按钮时隐藏/显示不同的容器，您将需要编写一些代码；GUI 构建器没有能力处理这个问题。

于 2009-02-08T00:28:08.410 回答
1

首先，您将其保存为.java文件。这是主要的 jframe 类。你先运行它。然后您会看到外部面板由构造函数添加到它。

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * MainFrame.java
 *
 * Created on Apr 20, 2010, 5:20:26 PM
 */

package game;

import javax.swing.SwingUtilities;

/**
 *
 * @author S.M. Mahmudul hasan
 */
public class MainFrame extends javax.swing.JFrame {

    /** Creates new form MainFrame */
    public MainFrame() {
        initComponents();
        addPanel();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        firstPanel = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        javax.swing.GroupLayout firstPanelLayout = new javax.swing.GroupLayout(firstPanel);
        firstPanel.setLayout(firstPanelLayout);
        firstPanelLayout.setHorizontalGroup(
            firstPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 457, Short.MAX_VALUE)
        );
        firstPanelLayout.setVerticalGroup(
            firstPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 398, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(firstPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(firstPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MainFrame().setVisible(true);
            }
        });
    }

    private void addPanel() {
        MainPanel m=new MainPanel();
        this.getContentPane().remove(0);
        firstPanel.removeAll();
        javax.swing.GroupLayout firstPanelLayout = new javax.swing.GroupLayout(firstPanel);
        firstPanel.setLayout(firstPanelLayout);
        firstPanelLayout.setHorizontalGroup(
            firstPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(firstPanelLayout.createSequentialGroup()
                .addGap(78, 78, 78)
                .addComponent(m, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(79, Short.MAX_VALUE))

        );
        firstPanelLayout.setVerticalGroup(
            firstPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(firstPanelLayout.createSequentialGroup()
                .addGap(25, 25, 25)

                .addComponent(m, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGap(23, 23, 23))
        );
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(firstPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(firstPanel, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        SwingUtilities.updateComponentTreeUI(this.getContentPane());
    }

    // Variables declaration - do not modify
    private javax.swing.JPanel firstPanel;
    // End of variables declaration

}

面板类：

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * MainPanel.java
 *
 * Created on Apr 20, 2010, 5:21:03 PM
 */

package game;

import java.awt.Graphics;

/**
 *
 * @author S.M. Mahmudul hasan
 */
public class MainPanel extends javax.swing.JPanel {

    /** Creates new form MainPanel */
    public MainPanel() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();

        setBorder(javax.swing.BorderFactory.createTitledBorder("paintable area"));

        jLabel1.setText("Paintable area");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(86, 86, 86)
                .addComponent(jLabel1)
                .addContainerGap(128, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(103, 103, 103)
                .addComponent(jLabel1)
                .addContainerGap(119, Short.MAX_VALUE))
        );
    }// </editor-fold>

  @Override public void paintComponent(Graphics g) {
         super.paintComponent(g);    // paints background
         g.drawString("shohan", 50, 100);
    }

    // Variables declaration - do not modify
    private javax.swing.JLabel jLabel1;
    // End of variables declaration

}
于 2010-04-20T11:52:43.940 回答
0

更改 JFrame 中的面板后，执行 frameObj.pack();

于 2009-04-30T06:37:40.803 回答
0

If you want the menus to react to clicks, you need to add Listeners to the menu items, Which in response will show the correct panel.

于 2009-02-07T23:18:33.483 回答
0

如果您真的想让您的 GUI 更具吸引力，请使用JDesktopPane并查看结果。

于 2012-06-23T10:33:46.357 回答