StackOverflow運行時出錯

Question

我的代碼編譯但是當我運行它時，彈出一個奇怪的錯誤消息。

錯誤消息說

"java.lang.StackOverflowError:null(in sun.awt.Win32GraphicsConfig).

什麼它應該做的是打印出一個按鈕排列的4×10面板用按鈕列出所有存儲的信息爲止。按鈕現在不做任何事情，但沒關係，因爲我現在只關心實際的圖形。還有另一個類用於數組列表，如果需要的話我可以將它放在註釋中。

下面是代碼：

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.util.Scanner; 
import java.util.ArrayList; 
import java.util.*; 
import java.io.File; 
import java.io.PrintWriter; 
public class CulminatingProjectGUI extends JFrame implements ActionListener 
{ 
    private static JButton[][] jbtNumButtons = new JButton[10][4]; 
    private static JButton jbtList = new JButton("List"); 
    ArrayList<Culminating> seats = new ArrayList<Culminating>(); 
    public CulminatingProjectGUI() 
    { 
    //Construct JFame object as a container for other objects 
    JFrame frame = new JFrame("Fly By Buddies"); 
    //Set the dimensions of the window 
    frame.setSize(750, 720); 
    //Creates a pane for content 
    JPanel pane = new JPanel(); 
    pane.setLayout(new GridLayout(11, 4)); 


    jbtList.addActionListener(new CulminatingProjectGUI()); 
    for (int m = 1,n = 1; n < 11;) 
    { 

     jbtNumButtons[n][m].addActionListener(new CulminatingProjectGUI()); 
     if(n == 1) 
     { 
      jbtNumButtons[n][m].setText(m + "A"); 
     } 
     else if(n == 2) 
     { 
      jbtNumButtons[n][m].setText(m + "B"); 
     } 
     else if(n == 3) 
     { 
      jbtNumButtons[n][m].setText(m + "C"); 
     } 
     else if(n == 4) 
     { 
      jbtNumButtons[n][m].setText(m + "D"); 
     } 
     pane.add(jbtNumButtons[n][m]); 
     m++; 

     if(m > 4) 
     { 
      n++; 
      m = 0; 
     } 
    } 
    //add content pane to a frame 
    pane.add(jbtList); 
    frame.setContentPane(pane); 


    //Display the frame - window 
    frame.setVisible(true); 
    //Bring the window to front 
    frame.toFront(); 


    } 
    public static void main(String []args) 
    { 
     CulminatingProjectGUI frame = new CulminatingProjectGUI(); 
     //Create seat array. Still testing. 
    } 
    public void actionPerformed(ActionEvent e) 
    { 
     if (e.getActionCommand().equals("List")) 
     { 
      String listedFlyers = ""; 
      for (int h =0;h< 40;h++) 
      { 
       listedFlyers = listedFlyers + seats.get(h).toString() + "\n"; 
      } 

      JTextArea text = new JTextArea(listedFlyers, 10, 40); 
      JScrollPane scroll = new JScrollPane(text); 
     } 

     else if (e.getActionCommand().equals("")) 
     { 

     } 
    } 
} 

Answer 1

jbtNumButtons[n][m].addActionListener(new CulminatingProjectGUI());

這是問題所在。您創建了CulminatingProjectGUI的新實例，並在構造函數中一次又一次創建它。你應該考慮以下幾點：

jbtNumButtons[n][m].addActionListener(this);