如何在Java中堆叠叠加jPanel？

如何在Java中堆叠/叠加jPanel？

CardLayout

类具有可以满足您的要求的有用的API。使用类似的方法

next(), first(),last()

可能会有所帮助。我准备了一个简单的演示，该演示在父面板和/或框架中更改面板。看一看：

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class PanelChanger implements ActionListener{    JPanel panels;    public void init(Container pane)    {        JButton switcher = new JButton("Switch Active Panel!");        switcher.addActionListener(this);        JPanel login = new JPanel();        login.setBackground(Color.CYAN);        login.add(new JLabel("Welcome to login panel."));        JPanel another = new JPanel();        another.setBackground(Color.GREEN);        another.add(new JLabel("Yeah, this is another panel."));        panels = new JPanel(new CardLayout());        panels.add(login);        panels.add(another);        pane.add(switcher, BorderLayout.PAGE_START);        pane.add(panels, BorderLayout.CENTER);    }    public void actionPerformed(ActionEvent evt)    {        CardLayout layout = (CardLayout)(panels.getLayout());        layout.next(panels);    }    public static void main(String[] args)    {         Jframe frame = new Jframe("CardLayoutDemo");         PanelChanger changer = new PanelChanger();         changer.init(frame.getContentPane());         frame.pack();         frame.setVisible(true);    }}