我设计了一个欢迎屏幕界面,其中一个JFrame包含两个JPanels(右侧为JPanel1,左侧为JPanel2).左侧的按钮用于切换JPanel1中的面板.我想按一个按钮,用另一个JPanel替换JPanel1内容,但我不知道如何.请帮忙.

解决方法:

这是一个非常简单的示例,它应近似于您的描述.在左侧,我们有一个拥抱按钮可以切换右侧面板的内容.在右边,您有一个带有给定边框和标签的面板.当您按下按钮时,右侧的内容将与另一个面板交换.

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class TestCardLayout2 {

    protected void initUI() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel leftPanel = new JPanel(new BorderLayout());
        JLabel label = new JLabel("Left panel");
        leftPanel.add(label, BorderLayout.NORTH);
        JButton button = new JButton("Toggle right panel");
        leftPanel.add(button);
        frame.add(leftPanel, BorderLayout.WEST);

        final CardLayout cardLayout = new CardLayout();
        final JPanel rightPanel = new JPanel(cardLayout);
        rightPanel.setPreferredSize(new Dimension(200, 500));

        JPanel rightPanel1 = new JPanel(new FlowLayout(FlowLayout.LEFT));
        rightPanel1.setBorder(BorderFactory.createLineBorder(Color.RED));
        JPanel rightPanel2 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        rightPanel2.setBorder(BorderFactory.createLineBorder(Color.BLUE));
        JLabel label1 = new JLabel("Right panel 1 with a red border");
        JLabel label2 = new JLabel("Right panel 2 with a blue borer");
        rightPanel1.add(label1);
        rightPanel2.add(label2);

        rightPanel.add(rightPanel1, "panel1");
        rightPanel.add(rightPanel2, "panel2");
        frame.add(rightPanel, BorderLayout.EAST);

        button.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                cardLayout.next(rightPanel);
            }
        });
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new TestCardLayout2().initUI();
            }
        });
    }

}