Java Swing, 在JPanel上添加JTable

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

public class MyJFrame extends JFrame {

	private JPanel contentPane;

	/**
	 * Create the frame.
	 */
	public MyJFrame() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 400, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);

		// set the header of the table
		String[] header = {"CurrencyName", "CurrencyNumber"};
		// set the data of the table
		String[][] data = {{"USD", "1000.00"}, {"GBP", "1000.00"}, {"EUR", "1000.00"}, {"CNY", "1000.00"}};
		
		// create a table model
		DefaultTableModel model = new DefaultTableModel(data, header);
		// create a JTable object
		JTable table = new JTable(model);
		// set the style of the table
		table.setGridColor(Color.BLACK);
		table.setEnabled(false);

		// must do: bind a JTable object to a JScrollPane object, otherwise the header of the table will not be displayed in the JPanel.
		JScrollPane jScrollPane = new JScrollPane();
		// key, crucial!
		jScrollPane.setViewportView(table);
		// set the position of the JScrollPane object
		jScrollPane.setBounds(20, 20, 360, 100);
		// add the JScrollPane object to JPanel
		add(jScrollPane);
	}
}