我在我的代碼中遇到CardLayout Manager
問題。我無法弄清楚爲什麼我得到這個例外。我在CardLayout.show()
方法中傳遞一個字符串,但仍然出現此錯誤。請幫忙。這是我的主要課程。java.lang.IllegalArgumentException:無法添加到佈局:約束必須是字符串
@SuppressWarnings("serial")
public class Main extends JFrame implements ActionListener {
final static String mainMenuPanel = "Main Menu";
final static String creditsPanel = "Credits";
final static String introPanel = "Introduction";
private CardLayout cardLayout = new CardLayout();
private JPanel cards = new JPanel(cardLayout);
public Main(){
//Create and set up the window.
super();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLayout(new CardLayout());
//this.pack();
this.setVisible(true);
this.setSize(new Dimension(800,600));
this.setLocationRelativeTo(null);
this.setTitle("Wise Frog Productions.");
cards.add(new IntroGamePanel(),introPanel);
cards.add(new MainMenu(),mainMenuPanel);
this.add(cards);
swapView(mainMenuPanel);
}
public void swapView(String s){
cardLayout.show(cards,s);
}
public void actionPerformed(ActionEvent event){
}
public static void main(String[] args){
javax.swing.SwingUtilities.invokeLater(new Runnable(){
public void run(){
new Main();
}
});
}
這是我從外面交換卡片的課程。
public class IntroGamePanel extends JPanel implements MouseInputListener{
private Main main;
ImageIcon beginButtonIcon1 = new ImageIcon(IntroGamePanel.class.getResource("begin_0.gif"));
ImageIcon beginButtonIcon2 = new ImageIcon(IntroGamePanel.class.getResource("begin_1.gif"));
JButton beginButton = new JButton("", beginButtonIcon1);
public IntroGamePanel(){
super();
this.setOpaque(true);
this.add(beginButton);
this.setPreferredSize(new Dimension(800,600));
beginButton.setPreferredSize(new Dimension(200,36));
beginButton.setLocation(240,40);
beginButton.addMouseMotionListener(this);
beginButton.addMouseListener(this);
beginButton.setEnabled(true);
}
@Override
//This will take us to the main menu screen.
public void mouseClicked(MouseEvent e) {
if(main != null){
main.swapView(Main.mainMenuPanel);
}
}
@Override
public void mouseEntered(MouseEvent e) {
beginButton.setIcon(beginButtonIcon2);
}
@Override
public void mouseExited(MouseEvent e) {
beginButton.setIcon(beginButtonIcon1);
}
@Override
public void mousePressed(MouseEvent e) {
//not needed
}
@Override
public void mouseReleased(MouseEvent e) {
//not needed
}
@Override
public void mouseDragged(MouseEvent e) {
//not needed
}
@Override
public void mouseMoved(MouseEvent e) {
//not needed
}
public void getMain(Main main){
this.main = main;
}
}
我需要一些實際上很緊急的幫助。 :(
請發佈你的stacktrace以及 –
請在你的問題包括堆棧跟蹤和te請問我們你的程序中的哪些行對應於堆棧跟蹤中的行號。 –