我是一種新的Java,並且我在每臺運行我的程序的計算機上遇到這個小問題。 我的代碼是額外的按鈕不斷出現
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class FrameTest2 {
public static void main(String[] args){
String s = "Catch Torchic";
MainMenu m = new MainMenu(s);
}
}
class MainMenu extends JFrame {
JButton autoa, manualb, createc, exitd;
public MainMenu(String s){
super(s);
setBackground(new Color(247,247,111));
setSize(640,600);
setVisible(true);
setResizable(false);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
Container contentPane = getContentPane();
setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
CustomPanel panel = new CustomPanel();
panel.setAlignmentX(Component.CENTER_ALIGNMENT);
panel.setMinimumSize(new Dimension(600,365));
panel.setPreferredSize(new Dimension(600,365));
panel.setMaximumSize(new Dimension(600,365));
panel.setBackground(new Color(247,247,111));
contentPane.add(panel);
JPanel btnPanel = new JPanel();
btnPanel.setLayout(new BoxLayout(btnPanel, BoxLayout.Y_AXIS));
btnPanel.setBackground(new Color(247,247,111));
autoa = new JButton("AutoPlay");
autoa.setAlignmentX(Component.CENTER_ALIGNMENT);
btnPanel.add(autoa);
manualb = new JButton("Manual Play");
manualb.setAlignmentX(Component.CENTER_ALIGNMENT);
btnPanel.add(manualb);
createc = new JButton("Create Maze");
createc.setAlignmentX(Component.CENTER_ALIGNMENT);
btnPanel.add(createc);
exitd = new JButton("Exit");
exitd.setAlignmentX(Component.CENTER_ALIGNMENT);
btnPanel.add(exitd);
btnPanel.setAlignmentX(Component.CENTER_ALIGNMENT);
contentPane.add(btnPanel);
setContentPane(contentPane);
ButtonHandler handler = new ButtonHandler(this);
autoa.addActionListener(handler);
manualb.addActionListener(handler);
createc.addActionListener(handler);
exitd.addActionListener(handler);
}
}
class ButtonHandler implements ActionListener{
MainMenu mm;
public ButtonHandler(MainMenu mm){
this.mm = mm;
}
public void actionPerformed(ActionEvent e){
if(e.getSource() == mm.autoa)
System.out.println("Clicked on Auto");
else if(e.getSource() == mm.manualb)
System.out.println("Clicked on Manual");
else if(e.getSource() == mm.createc)
System.out.println("Clicked on Create");
else
System.exit(0);
}
}
class CustomPanel extends JPanel{
public void paintComponent (Graphics painter){
Image pic = Toolkit.getDefaultToolkit().getImage("logo.png");
if(pic != null) painter.drawImage(pic, 105, 30, this);
}
}
那裏總是在左上角的額外按鈕,我的問題是,我該如何去除呢?該按鈕以隨機間隔顯示,有時不顯示。
1)*「This code results into ..」* Compilation errors。爲了更快地獲得更好的幫助,請發佈[SSCCE](http://sscce.org/)。 2)請爲代碼塊使用一致的邏輯縮進。 – 2012-04-07 00:20:50
我試過你的代碼沒有改變,它的工作很好,就像你可以在這張圖中看到的一樣:http://hpics.li/acc7d7d。 – 2012-04-07 00:21:29
我編輯了代碼並放置了所有的類。 我沒有使用Eclipse,netbeans之類的東西。我只用了Notepad ++。 – 2012-04-07 00:59:00