如何从 JFrame 的中心元素显示不同的页面（已设置为 BorderLayout）

import java.awt.BorderLayout;
import java.awt.Component;  
import javax.swing.JFrame;
import javax.swing.border.Border;

public class GuiController extends JFrame {

    private CentreFrameController centreFrameController;
    private CustomerPage customerPage;
    private LoginPage loginPage;
    public GuiController(){
        centreFrameController=new CentreFrameController(this);      
        setLayout(new BorderLayout());      

        add(centreFrameController,BorderLayout.CENTER);     

        setTitle("Courier System-Login Page");
        setVisible(true);
        setSize(550,650);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }   
}

CentreFrameController

import java.awt.BorderLayout;
import java.awt.Graphics; 
import javax.swing.JPanel;

public class CentreFrameController extends JPanel {

    private GuiController guiController;
    private CustomerPage customerPage;
    private LoginPage loginPage;
    public CentreFrameController(GuiController guiController){
        this.guiController=guiController;
        loginPage=new LoginPage(this);
        setLayout(new BorderLayout());

        add(loginPage,BorderLayout.CENTER);
        loginPage.addLoginPageListener(new LoginPageListener(){
            public void getLoginPageReply(int reply) {
                switch(reply){
                case 0:System.out.println("Customer login sucess");
                setCustomerHomePage();
                break;
                case 1:System.out.println("Admin login success");
                }
            }
        });
    }
    public void setCustomerHomePage(){
        customerPage=new CustomerPage(this,loginPage);
        add(customerPage,BorderLayout.CENTER);///This is the part which is not working
    }
}

这部分代码的目的是：

1. 我想做GuiController框架在所有页面上都有一些适用于我的应用程序的通用样式（无论任何活动）
2. The GuiController框架给出了中心元素样式BorderLayout to the CentreFrameController panel
3. Now the CentreFrameController应该在收到消息后切换页面LoginListener。但在这里，当它听到LoginListener，它没有添加CustomerPage到它的布局（请注意，这里，CustomerPage类被扩展JPanel我还没有上传它，因为它并不是真正必要的）。

这里有一个mcve演示如何使用CardLayout正如安德鲁·汤普森所建议的：

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class GuiController extends JFrame {

    private boolean isRedShowing;

    public GuiController(){

        setTitle("CardLayout Demo");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        CentreFrameController centreFrameController = new CentreFrameController();
        centreFrameController.showRedPane();
        isRedShowing = true;
        setLayout(new BorderLayout());
        add(centreFrameController,BorderLayout.CENTER);
        JButton toggle = new JButton("Toggle");
        toggle.addActionListener(e ->{
            if(! isRedShowing) {
                centreFrameController.showRedPane();
            } else {
                centreFrameController.showYelloPane();
            }
            isRedShowing = ! isRedShowing;
        });
        add(toggle,BorderLayout.PAGE_END);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        new GuiController();
    }
}

class CentreFrameController extends JPanel {

    public final String YELLOW_PAGE = "yellow page";
    public final String RED_PAGE = "red page";
    private final CardLayout cLayout;

    public CentreFrameController(){

        cLayout = new CardLayout();
        setLayout(cLayout);
        setPreferredSize(new Dimension(200, 150));
        add(YELLOW_PAGE, new YellowPane());
        add(RED_PAGE, new RedPane());
    }

    //two convenience methods that encapsulate CardLayout#show(Container, String)
    void showRedPane() {
        cLayout.show(this, RED_PAGE);
    }

    void showYelloPane() {
        cLayout.show(this, YELLOW_PAGE);
    }
}

class RedPane extends JPanel{

    RedPane(){
        setBackground(Color.RED);
    }
}

class YellowPane extends JPanel{

    YellowPane(){
        setBackground(Color.YELLOW);
    }
}

您可以使用以下命令控制显示哪张卡CarrdLayout show.