JTable构造函数的替代方案

在花了无数个小时与Swing合作并努力学习之后，我遇到了这个问题 . 在谈到确切的问题之前，我想简要介绍一下情况 . 如果您立即发现问题，请随意跳过此处 .

过去3天我一直在和JTables一起工作（或至少尝试过） . 我在使用JTable构造函数时遇到了一些问题：

JTable(Object[][] rowData, Object[] columnNames)

阅读并重读oracle documentation后，我偶然发现了一些关于JTable构造函数的问题（使用它的缺点）：

• 它们会自动使每个单元格都可编辑 .

• 它们将所有数据类型视为相同（作为字符串） . 例如，如果表列具有布尔数据，则表可以在复选框中显示数据 . 但是，如果使用前面列出的两个JTable构造函数中的任何一个，则布尔数据将显示为字符串 . 您可以在上图的素食列中看到这种差异 .

• 它们要求您将所有表的数据放在数组或向量中，这可能不适合某些数据 . 例如，如果要从数据库中实例化一组对象，则可能需要直接查询对象的值，而不是将所有值复制到数组或向量中 .

Both the first and third points are giving me issues so I would like to ask a few question:

• 如何使单个列宽静止，此时，所有列宽均匀并在调整大小时均匀缩放 . 这是一个问题，因为列“ID”显然不需要像“E-mail”列那样多的空间

• 由于某些奇怪的原因，我一直有问题显示列名，将我的String [] columnNames传递给构造函数，但框架上没有显示任何内容 .

JTable代码：

private JTable addStudentsJTable(){
    String[] columnNames = {
            "Teacher ID",
            "Student ID",
            "Name",
            "Surname",
            "E-mail",
            "Date of Birth",
            "Telephone",
            "Course",
            "OOP",
            "Year of Membership",
            "Consent"};

    Object[][] data = {
            {1, 1, "Random", "Student", "Student@email.com", "1/1/1970", 9999999, "MC", true, 2014, true},
            {2, 2, "Student", "Surname", "RandomStudent@email.com", "1/1/1970", 11111111, "AIO", true, 2000, true}
    };
    studentsJTable = new JTable(data, columnNames);

    studentsJTable.setPreferredScrollableViewportSize(new Dimension(850,200));
    studentsJTable.setFillsViewportHeight(true);

    JScrollPane scrollPane = new JScrollPane(studentsJTable);
    add(scrollPane);
    return studentsJTable;
}

整个JFrame类：

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.table.TableModel;
import java.awt.*;

public class JDatabaseMainFrame extends JFrame {
    private JTable studentsJTable;
    private JPanel contentPane;

public JDatabaseMainFrame(){
    JFrame frame = new JFrame("JDatabase");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    setTitle("JDatabase");
    setResizable(true);
    setMinimumSize(new Dimension(850,350));

    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(new CardLayout(0, 0));

    //Adding tabs
    JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.LEFT);
    contentPane.add(tabbedPane, "Tabs");

    //Adding Student's panel
    JPanel studentsPanel = new JPanel();
    tabbedPane.addTab("Students", null, studentsPanel, null);
    studentsPanel.setLayout(new BorderLayout(0, 0));

    //Adding JTable to Student's panel
    JTable studentsJTable = addStudentsJTable();
    studentsPanel.add(studentsJTable, BorderLayout.CENTER);

    //Adding Teacher's panel
    JPanel teachersPanel = new JPanel();
    tabbedPane.addTab("Teachers", null, teachersPanel, null);

    //Adding Outing's panel
    JPanel outingsPanel = new JPanel();
    tabbedPane.addTab("Outings", null, outingsPanel, null);

    setBounds(200,200,650,650);
    pack();
    setVisible(true);
}

private void printData(JTable jTable){
    int numberOfRows = jTable.getRowCount();
    int numberOfColumns = jTable.getColumnCount();

    TableModel model = jTable.getModel();

    for(int i = 0; i < numberOfRows; i++){
        System.out.println("Row: " + i + ":");
        for(int j = 0; j < numberOfColumns; j++){
            System.out.println("  " + model.getValueAt(i, j));
        }
        System.out.println();
    }
    System.out.println("-------------------------------");
}

private JTable addStudentsJTable(){
    String[] columnNames = {
            "Teacher ID",
            "Student ID",
            "Name",
            "Surname",
            "E-mail",
            "Date of Birth",
            "Telephone",
            "Course",
            "OOP",
            "Year of Membership",
            "Consent"};

    Object[][] data = {
            {1, 1, "Random", "Student", "Student@email.com", "1/1/1970", 9999999, "MC", true, 2014, true},
            {2, 2, "Student", "Surname", "RandomStudent@email.com", "1/1/1970", 11111111, "AIO", true, 2000, true}
    };
    studentsJTable = new JTable(data, columnNames);

    studentsJTable.setPreferredScrollableViewportSize(new Dimension(850,200));
    studentsJTable.setFillsViewportHeight(true);

    JScrollPane scrollPane = new JScrollPane(studentsJTable);
    add(scrollPane);
    return studentsJTable;
}
public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            JDatabaseMainFrame frame = new JDatabaseMainFrame();
            frame.setVisible(true);
        }
    });
}
}

随意编译它以查看当前的结果！