java - JFrame 屏幕更换问题

Question

我遇到的问题是，当我尝试用第二个屏幕替换主屏幕时，它会删除旧屏幕，但卡在新屏幕中。如果我最大化屏幕，我可以看到新的面板。我遇到的另一个问题是如何在网格布局中占用空间而不使用我必须做的所有填充 jpanels。代码如下:

package home.personalprojects.jordan.ArrayGame;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class GuiMain extends JFrame
{

private JButton Inventory, Store, Up, Down, Left, Right, Move, GameInfo, Back = new JButton("Back");
private JLabel pstats, roominfo;
private JPanel Filler1,Filler2,Filler3,Filler4,Filler5,Filler6,Filler7,Filler8,Filler9,Filler10,Filler11;
private JPanel Controls, Main = new JPanel(), BackPanel;

PlayerTraits pt = new PlayerTraits();
Rooms rm = new Rooms();

public GuiMain(){
    super("Dungeon Crawler v 0.0.1 Created By: Jordan Savage");
    Main.setLayout(new GridLayout(4,3));

    //mainbuttons
    Inventory = new JButton("Inventory");
    Inventory.setToolTipText("Gives you access to all of your items and lets      you manage them");

    Store = new JButton("Store");
    Store.setToolTipText("The marketplace where you can buy and sell items such as swords and armor");

    Move = new JButton("Move");
    Move.setToolTipText("Choose where you want to move next");

    GameInfo = new JButton("Game Information and Settings");
    GameInfo.setToolTipText("All the info for the game including instructions, version info, and settings");

    //main labels
    pstats = new JLabel(pt.name + ": " + pt.gold + " Gold, " + pt.health + " Health, and Level is " + pt.lvl);
    roominfo = new JLabel("You are at: (" + pt.x + "," + pt.y + ") In room: " + rm.name);

    //fillers for grid layout
    Filler1 = new JPanel();Filler2 = new JPanel();Filler3 = new JPanel();Filler4 = new JPanel();Filler5 = new JPanel();Filler6 = new JPanel();Filler7 = new JPanel();Filler7 = new JPanel();Filler8 = new JPanel();Filler9 = new JPanel();Filler10 = new JPanel();Filler11 = new JPanel();  

    //action listeners
    Move.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            ControlScheme();
            BackToMain();
            getContentPane().removeAll();
            getContentPane().add(Controls, BorderLayout.CENTER);
            getContentPane().add(BackPanel, BorderLayout.SOUTH);
            getContentPane().doLayout();
            update(getGraphics());
        }
    });

    Back.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            getContentPane().removeAll();
            getContentPane().add(Main);
            getContentPane().doLayout();
            update(getGraphics());
        }
    });

    Main.add(Inventory);
    Main.add(Filler1);
    Main.add(Store);
    Main.add(Filler2);
    Main.add(pstats);
    Main.add(Filler3);
    Main.add(Filler4);
    Main.add(roominfo);
    Main.add(Filler5);
    Main.add(Move);
    Main.add(Filler6);
    Main.add(GameInfo);
    add(Main);
}

public void BackToMain(){
    BackPanel = new JPanel();
    BackPanel.setLayout(new FlowLayout());
    BackPanel.add(Back);
}


public void ControlScheme(){
    Up = new JButton("Up");
    Down = new JButton("Down");
    Left = new JButton("Left");
    Right = new JButton("Right");

    Controls = new JPanel();
    Controls.setLayout(new GridLayout(3,3));

    Controls.add(Filler7);
    Controls.add(Up);
    Controls.add(Filler8);
    Controls.add(Left);
    Controls.add(Filler9);
    Controls.add(Right);
    Controls.add(Filler10);
    Controls.add(Down);
    Controls.add(Filler11);

}

public static void main(String[] args)
{

    GuiMain gm = new GuiMain();
    gm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    gm.setSize(800, 600);
    gm.setVisible(true);
    gm.setLocationRelativeTo(null);

}

}

感谢任何帮助:)

Answer 1

简短的答案是调用 revalidate在框架上。

更好的答案是使用 CardLayout ，它的设计目的正是为了完成您想要做的事情...

关于你的第二个问题，不能用GridLayout来完成。 ，事实上，你可能会发现即使使用 GridBagLayout 也很难实现这使您可以控制虚拟网格内组件的放置。

您可以做的是使用空面板填充网格，将它们保留在某种矩阵查找中(即 getComponentAt(gridx, gridy) )，并使用它们来放置您的组件。

例如。如果你想在网格 2x3 放置一个面板，您只需查看该网格位置的面板并将组件放置在其上即可。

ps- 当我思考时，您可能还需要 repaint之后revalidate如果revalidate沿着不起作用...