java - 如何更改 JFrame 上的面板？

Question

因此，我尝试在 3 秒后将 JFrame 的面板从 IntroPanel 更改为主菜单面板。但当我尝试这样做时，它似乎并没有删除面板并添加另一个面板。我不太确定如何解决这个问题，所以我会采取任何建议来解决这个问题。谢谢!

package gamecs245;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/**
*
* @author ozhang
*/
public class View extends JFrame {

IntroPanel introP = new IntroPanel();
MainMenuPanel mainP = new MainMenuPanel();
CreditsPanel creditP = new CreditsPanel();
private Timer timer;
private int counter = 3;
private final int delay = 1000;

public View(){

startUp();
add(introP);

    ActionListener action = new ActionListener()
    {   
        @Override
        public void actionPerformed(ActionEvent event)
        {
            if(counter == 0)
            {
                timer.stop();
                System.out.println("Panel added");
                remove(mainP);
                add(mainP);

            }
            else
            {
                System.out.println(counter);
                counter--;
            }
        }
    };

    timer = new Timer(delay, action);
    timer.setInitialDelay(0);
    timer.start();



}

private void startUp(){
    setVisible(true);
    setFrameDimensions();
    setCloseOperation();
    setFrameTitle();
    setLocationRelativeTo(null);

}

private void removeIntro(){
    remove(introP);
}

private void setFrameDimensions(){
    setSize(600,400);
}

private void setCloseOperation(){
    setDefaultCloseOperation(EXIT_ON_CLOSE);
}

private void actionPerformed(){

}

private void setFrameTitle(){
    setTitle("CS245 Project");
}

}

Answer 1

你能试试这个吗？

View.remove(<panel to hide>);
View.add(<panel to show>);