很绿色关于Java类组件的东西等,所以请原谅我,如果由我提供的信息是不够的!
Considet下面的代码。 添加菜单和菜单显示框,没有问题。 我想,当gameOn()被调用去掉菜单,而开始游戏。 下面的代码不仅使框架表面“空白”,没有任何的GamePanel增加。
关于如何解决此问题的任何想法/建议? 该MenuPanel拥有的MouseListener。
public class GameFrame extends JFrame {
private MenuPanel mp; //extends JPanel
private GamePanel gp; //extends JPanel
public GameFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(new Dimension(GameFrame.XSIZE, GameFrame.YSIZE));
setLocationRelativeTo(null);
setVisible(true);
mp = new MenuPanel(this);
add(mp);
}
public void gameOn() {
remove(mp);
GamePanel gp = new GamePanel(5);
add(gp);
}
}
而不是试图添加删除组件,使用CardLayout
CardLayout cardLayout = new CardLayout();
JPanel mainPanel = new JPanel(cardLayout);
MenuPanel menu = new MenuPanel();
GamePanel game = new GamePanel();
mainPanel.add(menu, "menu");
mainPanel.add(game, "game");
...
public void gameOn() {
cardLayout.show(mainPanel, "game");
}
当gameOn()
被调用时, menu
会被推到后面,和game
的前面。
这样,您就不必不断添加和删除
这里是你可以运行一个实例
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Dimension;
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;
import javax.swing.SwingUtilities;
public class GameFrame extends JFrame implements ActionListener{
CardLayout cardLayout;
JPanel mainPanel;
MenuPanel menu;
GamePanel game;
public GameFrame() {
cardLayout = new CardLayout();
mainPanel = new JPanel(cardLayout);
menu = new MenuPanel();
game = new GamePanel();
mainPanel.add(menu, "menu");
mainPanel.add(game, "game");
JButton goGame = new JButton("Go TO Game");
goGame.addActionListener(this);
add(mainPanel);
add(goGame, BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setLocationByPlatform(true);
setVisible(true);
}
@Override
public void actionPerformed(ActionEvent e) {
gameOn();
}
public void gameOn() {
cardLayout.show(mainPanel, "game");
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
GameFrame gameFrame = new GameFrame();
}
});
}
}
class MenuPanel extends JPanel {
public MenuPanel() {
setBackground(Color.GREEN);
add(new JLabel("Menu"));
}
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
}
}
class GamePanel extends JPanel {
public GamePanel() {
setBackground(Color.BLUE);
add(new JLabel("Game"));
}
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
}
}
添加的GamePanel后,不要validate();
public void gameOn() {
remove(mp);
gp = new GamePanel(5);
add(gp);
validate();
}
你需要repaint()
删除一个面板并添加另一个之后, setVisible(true)
应该已将您的componen TS的帧后进行,我建议做这样的EDT线程,以避免沉重的UI变化干扰。