怎样实现，Swing控件叠放？？？

hongming1129 2008-04-08 02:07:14

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！！！

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hongming1129 2008-04-09

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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！

marcien 2008-04-08

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呵呵，大家见了100分，就像苍蝇见了血，一窝蜂地涌了进来。:)

小宏 2008-04-08

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

小宏 2008-04-08

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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

Inhibitory 2008-04-08

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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();

            }

        });

    }



}

hongming1129 2008-04-08

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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。

小宏 2008-04-08

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我不知道你是不是这个意思

小宏 2008-04-08

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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();

}
}

hongming1129 2008-04-08