[완료] 자바 AWT/Swing 질문입니다.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
 
public class Practice {
 
    private JFrame theFrame;
    private ArrayList textFieldList;
    private JPanel mainPanel;
 
    private String [] row = {"0", "10", "20", "30", "40", "50", "60", "70", "80", "90"};
    private String [] col = {"90", "80", "70", "60", "50", "40", "30", "20", "10", "0"};
 
    public void buildGUI() {
        theFrame = new JFrame("연습");
        theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        BorderLayout layout = new BorderLayout();
	JPanel background = new JPanel(layout);
	background.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
 
	textFieldList = new ArrayList();
 
	Box colName = new Box(BoxLayout.X_AXIS);
        colName.add(new Label());
	for (int i = 0; i < 10; i++) {
		colName.add(new Label(col[i]));
	}
 
 
	Box rowName = new Box(BoxLayout.Y_AXIS);
	for (int i = 0; i < 10; i++) {
		rowName.add(new Label(row[i]));
	}
 
	background.add(BorderLayout.NORTH, colName);
	background.add(BorderLayout.WEST, rowName);
 
	theFrame.getContentPane().add(background);
 
	GridLayout grid = new GridLayout(10, 10);
	grid.setVgap(1);
	grid.setHgap(2);
	mainPanel = new JPanel(grid);
	background.add(BorderLayout.CENTER, mainPanel);
 
	for (int i = 0; i < 100; i++) {
		TextField c = new TextField();
		textFieldList.add(c);
		mainPanel.add(c);
	}
 
	theFrame.setBounds(50, 50, 500, 500);
	theFrame.pack();
	theFrame.setVisible(true);
    }
 
    public static void main (String [] args) {
        new Practice().buildGUI();
    }
}