Java图形化界面及文件传入 的问题

import javax.swing.*;
import java.awt.*;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.ArrayList;

public class WrongQuestionSet extends JFrame{
    private JLabel[] questionLabels;
    private JLabel[][] rightButton;
    private JLabel[][] optionLabels;
    private ArrayList<Question> wrongQuestions = new ArrayList<>();
    public WrongQuestionSet(JPanel rightPanel){
        try {
            FileInputStream fileIn = new FileInputStream("wrong_questions.ser");
            ObjectInputStream in = new ObjectInputStream(fileIn);
            wrongQuestions = (ArrayList<Question>)in.readObject();
            optionLabels = new JLabel[wrongQuestions.size()][4];
            questionLabels = new JLabel[wrongQuestions.size()];
            rightButton = new JLabel[wrongQuestions.size()][4];

            JPanel panel = new JPanel(new GridLayout(wrongQuestions.size() * 5, 1));

            for (int i = 0; i < wrongQuestions.size(); i++) {
                // 题目
                questionLabels[i] = new JLabel((i+1) + ". " + wrongQuestions.get(i).getContent());
                System.out.println(questionLabels[i]);  //1
                panel.add(questionLabels[i]);

                //选项
                for (int j = 0; j < wrongQuestions.get(i).getOptions().length; j++) {
                    optionLabels[i][j] = new JLabel((char) ('A' + j) + ". " + wrongQuestions.get(i).getOptions()[j]);
                    System.out.println(optionLabels[i][j]);
                    panel.add(optionLabels[i][j]);
                }

                // 正确答案
                String rightAnswer = "";
                for (int j = 0; j < wrongQuestions.get(i).getOptions().length; j++) {
                    if (wrongQuestions.get(i).getScores()[j] == 1) {
                        rightAnswer += (char)('A' + j);
                    }
                }
                rightButton[i][0] = new JLabel("正确答案：" + rightAnswer);
                panel.add(rightButton[i][0]);

                // Analysis
                JLabel analysisLabel = new JLabel("Analysis: " + wrongQuestions.get(i).getAnalysis());
                panel.add(analysisLabel);
            }

            JScrollPane scrollPane = new JScrollPane(panel);
            JPanel mainPanel = new JPanel(new BorderLayout());
            mainPanel.add(scrollPane, BorderLayout.CENTER);
            rightPanel.removeAll();
            rightPanel.add(mainPanel,BorderLayout.CENTER);

            in.close();
            fileIn.close();
        } catch (IOException i) {
            i.printStackTrace();
        } catch (ClassNotFoundException c) {
            System.out.println("Question class not found");
            c.printStackTrace();
        }
    }
}

为什么逻辑没有出错，但是运行结果一塌糊涂啊

1.序号对不上
2.正确的输出顺序应该是题干、选项abcd、正确答案、analysis分析（我代码逻辑没错啊）

GridLayout布局中将行数和列数都设置为非零值时，指定的列数将被忽略。所以你这里将列数指定为 0 就可以正常显示了。

JPanel panel = new JPanel(new GridLayout(0, 1));

PS: 对Swing还是不熟，参考了以前的问答才找到答案。 https://ask.csdn.net/questions/687788

• 你可以看下这个问题的回答https://ask.csdn.net/questions/7743042
• 这篇博客你也可以参考下：Java 为某研究所编写一个通用程序，用来计算每一种交通工具运行1000公里所需的时间，已知每种交通工具的参数都是3个整数ABC的表达式