我决定尝试将我的 JWindow 与我的主菜单的 JPanel 分开，但现在 JPanel 没有显示。当/如果我尝试调用我的 JWindow 类 (mainWindow) 将面板添加到其中时，我必须单击按钮两次，因为它第一次只是创建一个空的 JWindow。我只是想让它切换面板。关于如何为我的按钮获得所需效果的任何想法？任何帮助是极大的赞赏。
这是我的主菜单面板类：
import java.awt.BorderLayout;
import java.awt.Window;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JWindow;
import javax.swing.JLabel;
public class Database{
JComponent DatabasePanel() throws IOException {
// GridBagLayout/Constraint
GridBagConstraints gridbagcons= new GridBagConstraints();
gridbagcons.insets = new Insets(15,15,15,15);
//final String name = window.getName();
final JComponent window = new JLabel(new ImageIcon(ImageIO.read(new File("res/FinalBG.png"))));
window .setLayout(new GridBagLayout());
BufferedImage buttonIcon = ImageIO.read(new File("res/PlayGame.png"));
JButton button = new JButton ("", new ImageIcon(buttonIcon));
//Play Game button Action Listener
button.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
try{
panel.setVisible(false);
Database = new Database ();
JComponent Database = Databasepanel.Database ();
Database.setVisible(true);
} catch(IOException e1){
e1.printStackTrace();
}
}
});
BufferedImage buttonIcon2 = ImageIO.read(new File("res/Scoreboard.png"));
JButton buttonTwo = new JButton ("", new ImageIcon(buttonIcon2));
BufferedImage buttonIcon3 = ImageIO.read(new File("res/Instructions.png"));
JButton buttonThree = new JButton ("",new ImageIcon(buttonIcon3));
// Instructions button ActionListener
buttonThree.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
}
});
BufferedImage buttonIcon1b = ImageIO.read(new File("res/PlayGameHigh.png"));
button.setRolloverIcon(new ImageIcon(buttonIcon1b));
BufferedImage buttonIcon2b = ImageIO.read(new File("res/ScoreboardHigh.png"));
buttonTwo.setRolloverIcon(new ImageIcon(buttonIcon2b));
BufferedImage buttonIcon3b = ImageIO.read(new File("res/InstructionsHigh.png"));
buttonThree.setRolloverIcon(new ImageIcon(buttonIcon3b));
// Setting up GridBagConstraints for each JButton
gridbagcons.weightx=1;
gridbagcons.weighty=0;
gridbagcons.gridx=0;
gridbagcons.gridy=0;
gridbagcons.anchor = GridBagConstraints.CENTER;
panel.add(button, gridbagcons); //PLAY GAME
gridbagcons.weightx=1;
gridbagcons.weighty=0;
gridbagcons.anchor = GridBagConstraints.CENTER;
gridbagcons.gridx=0;
gridbagcons.gridy=1;
panel.add(buttonTwo,gridbagcons); //SCOREBOARD
gridbagcons.weightx=1;
gridbagcons.weighty=0;
gridbagcons.anchor = GridBagConstraints.CENTER;
gridbagcons.gridx=0;
gridbagcons.gridy=2;
panel.add(buttonThree,gridbagcons); //INSTRUCTIONS
// JButton icon details
button.setBorder(BorderFactory.createEmptyBorder());
button.setContentAreaFilled(false);
buttonTwo.setBorder(BorderFactory.createEmptyBorder());
buttonTwo.setContentAreaFilled(false);
buttonThree.setBorder(BorderFactory.createEmptyBorder());
buttonThree.setContentAreaFilled(false);
return panel;
}
}
JWindow 类：
import java.awt.BorderLayout;
import java.awt.Window;
import java.io.IOException;
import javax.swing.JComponent;
import javax.swing.JWindow;
import javax.swing.JPanel;
public class mainWindow {
public static void main(String[] args) throws IOException {
windowmain gui = new windowmain ();
gui.window();
}
public JWindow Window() throws IOException {
MainWindow passme = new MainMenu();
JComponent panel2 = passme.mainPanel();
JWindow window = new JWindow("Lohn Jocke and the Quest for Qualia"); //Had to set window to final for the action listener
window.add(panel2);
window.getContentPane().add(BorderLayout.CENTER, panel2 );
window.setSize(860,500);
window.setLocationRelativeTo(null);
window.setDefaultCloseOperation(JWindow.EXIT_ON_CLOSE);
window.setResizable(false);
window.setVisible(true);
return window;
}
}
此类包含我想在第一堂课中切换出来的面板：
import java.awt.BorderLayout;
import java.awt.Window;
import java.io.IOException;
import javax.swing.JComponent;
import javax.swing.JWindow;
import javax.swing.JPanel;
public class thewindow {
public static void main(String[] args) throws IOException {
thewindow gui = new thewindow ();
gui.Window();
}
public JWindow Window() throws IOException {
MainMenu passme = new MainMenu();
JComponent window = return.mainPanel();
JWindow window = new JWindow("Lohn Jocke and the Quest for Qualia"); //Had to set window to final for the action listener
window.add(panel2);
window.getContentPane().add(BorderLayout.CENTER, panel2 );
window.setSize(860,500);
window.setLocationRelativeTo(null);
window.setDefaultCloseOperation(JWindow.EXIT_ON_CLOSE);
window.setResizable(false);
window.setVisible(true);
return window;
}
}
再次感谢您的帮助。