Swing Java和匿名类从外部类访问类属性

Question

编辑 ：我发现以下代码有效。看来早期的代码出现了问题。但是，我仍然有一个亟待解决的问题，这个代码是否是一个好习惯？这是在主应用程序线程和Swing事件派发线程之间共享Swing对象底层的模型数据的可接受方法吗？

package com.guitest;

import java.awt.*;
import java.util.*;
import javax.swing.*;

public class Test {

public static void main(String[] args) {
    new Test().run();
}

public void run() {
    Board board = new Board();
    board.createBoard();
    board.setTileValue(2, 2, 3);
    board.revalidate();
    board.repaint();
}

@SuppressWarnings("serial")
public class Board extends JFrame {
    final int tileSize = 100;
    final int numberOfRows = 2;
    final int numberOfCols = 3;
    private final Map<Integer, Integer> _tiles;
    public Board() {
        _tiles = Collections.synchronizedMap(new HashMap<Integer, Integer>(numberOfRows*numberOfCols));
        for (int row = 0; row < numberOfRows; row++) {
            for (int col = 1; col <= numberOfCols; col++) {
                _tiles.put(row*numberOfCols+col, 1);
            }
        }
    }

    public void setTileValue(int row, int col, int value) {
        _tiles.put(row*(numberOfCols-1)+col, value);
    }

    public void createBoard() {
        SwingUtilities.invokeLater(new Runnable() {
            @Override public void run() {
                setLayout(new GridLayout(numberOfRows, numberOfCols, 0, 0));
                for (int row = 0; row < numberOfRows; row++) {
                    for (int col = 1; col <= numberOfCols; col++) {
                        add(createPanelFor(row, col));
                    }
                }
                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                setSize(numberOfCols*tileSize, numberOfRows*tileSize);
                setVisible(true);
            }
        });
    }

    public JPanel createPanelFor(final int row, final int col) {
        return new JPanel() {
            @Override protected void paintComponent(Graphics g) {
                g.setColor((col % 2 == 0) == (row % 2 == 0) ? Color.BLACK : Color.WHITE);
                g.fillRect(0, 0, getWidth(), getHeight());
                String string = String.valueOf(_tiles.get(row*numberOfCols+col));
                g.setColor(Color.RED);
                g.drawString(string, getHeight() / 2, getWidth() / 2);
            }
        };
    }
}
}