使JTable中的单元格可编辑 - 单元格的默认值

import javax.swing.table.AbstractTableModel;

public class MyTableModel extends AbstractTableModel {
    private String[] columnNames = {"Name", "Age", "Country"};
    private Object[][] data = {
            {"Tom", 25, "USA"},
            {"Jerry", 22, "Canada"},
            {"Alice", 28, "UK"}
    };

    public int getColumnCount() {
        return columnNames.length;
    }

    public int getRowCount() {
        return data.length;
    }

    public String getColumnName(int col) {
        return columnNames[col];
    }

    public Object getValueAt(int row, int col) {
        return data[row][col];
    }

    public Class getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    }

    public boolean isCellEditable(int row, int col) {
        return true;
    }

    public void setValueAt(Object value, int row, int col) {
        data[row][col] = value;
        fireTableCellUpdated(row, col);
    }
}

import javax.swing.*;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Editable JTable");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        MyTableModel tableModel = new MyTableModel();
        JTable table = new JTable(tableModel);

        frame.getContentPane().add(new JScrollPane(table));
        frame.setSize(600, 400);
        frame.setVisible(true);
    }
}