如何在JFrame上显示JTable

JFrame frame = new JFrame("JTable示例");

Object[][] data = {
    {"John", 25, "USA"},
    {"Amy", 30, "Canada"},
    {"Linda", 28, "UK"}
};

String[] columnNames = {"姓名", "年龄", "国家"};

DefaultTableModel model = new DefaultTableModel(data, columnNames);

JTable table = new JTable(model);

JScrollPane scrollPane = new JScrollPane(table);

frame.getContentPane().add(scrollPane);

frame.setSize(400, 300);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class JTableExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("JTable示例");

        Object[][] data = {
                {"John", 25, "USA"},
                {"Amy", 30, "Canada"},
                {"Linda", 28, "UK"}
        };

        String[] columnNames = {"姓名", "年龄", "国家"};

        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        JTable table = new JTable(model);
        JScrollPane scrollPane = new JScrollPane(table);

        frame.getContentPane().add(scrollPane);

        frame.setSize(400, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}