怎样实现，Swing控件叠放？？？

要实现控件叠放，应该怎么作呢？
比如一个JLabel放在另一个JLabel上面，或者一个JPanel放在另一个JPanel上面。然后控制他们显示，要显示哪就个显示哪个。
高分求教！！！

解决方案 »

  1.   

    楼主是用Jbuilder拖的组件吧?
    应该可以自己写代码,两个组件都设置组件的x,y坐标
    你要显示哪个就把它设为可见,另一个则相反
    是这个意思吗?
      

  2.   

    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;public class CardLayoutDemo implements ActionListener{
         
         JPanel p1,p2,p3,p4;
         int i = 1;
         JFrame f;
         
        public CardLayoutDemo() {
        
         f = new JFrame();
            Container contentPane = f.getContentPane();
            contentPane.setLayout(new GridLayout(2,1));
            
            p1 = new JPanel();
            Button b = new Button("Change Card");
            b.addActionListener(this);
            p1.add(b);
            contentPane.add(p1);
            
            p2 = new JPanel();
            p2.setLayout(new FlowLayout());
            p2.add(new JButton("first"));
            p2.add(new JButton("second"));
            p2.add(new JButton("third"));
            p3 = new JPanel();
            p3.setLayout(new GridLayout(3,1));
            p3.add(new JButton("fourth"));
            p3.add(new JButton("fifth"));
            p3.add(new JButton("This is the last button"));
            p4 = new JPanel();
            p4.setLayout(new CardLayout());
            p4.add("one",p2);
            p4.add("two",p3);
            ((CardLayout)p4.getLayout()).show(p4,"one");
            
            contentPane.add(p4);
            
        f.setTitle("CardLayout");
        f.pack();
            f.setVisible(true);
            
            f.addWindowListener(new WindowAdapter() {
                public void windowClosing(WindowEvent e) {
                        System.exit(0);
                }
            });
        }
        
        public void actionPerformed(ActionEvent event)
        {
            switch(i)
            {
                case 1:
                    ((CardLayout)p4.getLayout()).show(p4,"two");
                    break;
                case 2:
                    ((CardLayout)p4.getLayout()).show(p4,"one");
                    break;
            }
            i++;
            if (i==3)
                i=1;
                
            f.validate();
        }
             
        public static void main(String args[]) {
        
            new CardLayoutDemo();
            
        }
    }
      

  3.   

    happyandsad，我的意思不是cardlayout，cardlayout实现的叠放不是我要的效果。我要的是这样的，比如，显示一张图片，然后在图片上显示一个lable或者button之类的东西，但可以看到图片。
    还是要谢谢你，happyandsad。
      

  4.   

    也许这个程序对你有点帮助, 正好以前做过实验:
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;public class MultiPanel extends JPanel {
        private static final long serialVersionUID = 1L;
        private JButton           changeButton1;
        private JButton           changeButton2;
        private JButton           changeButton3;
        private JPanel            panel1;
        private JPanel            panel2;
        private JPanel            panel3;
        private JPanel            currentPanel;    public MultiPanel() {
            this.setLayout(new BorderLayout());        changeButton1 = new JButton("<html><font color=red>Red Panel</font></html>");
            changeButton2 = new JButton("<html><font color=green>Green Panel</font></html>");
            changeButton3 = new JButton("<html><font color=blue>Blue Panel</font></html>");
            panel1 = new JPanel();
            panel2 = new JPanel();
            panel3 = new JPanel();        panel1.setBackground(Color.RED);
            panel2.setBackground(Color.GREEN);
            panel3.setBackground(Color.BLUE);
            currentPanel = panel1;        Box box = Box.createHorizontalBox();
            box.add(changeButton1);
            box.add(changeButton2);
            box.add(changeButton3);
            this.add(box, BorderLayout.SOUTH);        this.add(currentPanel, BorderLayout.CENTER);        addButtonActionListener();
        }    private void addButtonActionListener() {
            changeButton1.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    currentPanel.setVisible(false);
                    currentPanel = panel1;
                    currentPanel.setVisible(true);
                    add(currentPanel, BorderLayout.CENTER);
                    validate();
                }
            });        changeButton2.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    currentPanel.setVisible(false);
                    currentPanel = panel2;
                    currentPanel.setVisible(true);
                    add(currentPanel, BorderLayout.CENTER);
                    validate();
                }
            });        changeButton3.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    currentPanel.setVisible(false);
                    currentPanel = panel3;
                    currentPanel.setVisible(true);
                    add(currentPanel, BorderLayout.CENTER);
                    validate();
                }
            });
        }    private static void createAndShowGUI() {
            JFrame frame = new JFrame("Multi Panel");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setSize(500, 600);        MultiPanel panel = new MultiPanel();
            frame.getContentPane().add(panel, BorderLayout.CENTER);        frame.setVisible(true);
        }    /**
         * @param args
         */
        public static void main(String[] args) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    MultiPanel.createAndShowGUI();
                }
            });
        }}
      

  5.   

    可以通过LayeredPane这个容器来实现你的效果.他是一个相当于层的容器.控件之间可以相互叠加的.不影响他们的显示效果.
    不知道这次合不合你意.如果要例子的话我可以给你一个
      

  6.   

    http://blog.csdn.net/mq612/archive/2006/10/18/1339872.aspx
      

  7.   

    happyandsad的第二个想法，跟我一致，但我试了几次，没弄出要的效果来。
    经过多次尝试，搞定啦。谢谢各位。三分！