汇智学堂-JAVA游戏开发（五子棋之五--背景中绘制棋盘）

修改Board类，增加绘图方法
public void paint(Graphics g)
{
super.paint(g);
repaint();
}
修改后的Board类，见下文：

package com.fivechess.view;

import java.awt.Graphics;
import javax.swing.JFrame;
public class Board extends JFrame {
public Board() {
setLayout(null); //取消原来布局
setBounds(300,50,800,700);
//init1();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setTitle(“雷雷的五子棋”);
}

/**
 * 绘图
 * @param g
 */
public void paint(Graphics g)
{
    super.paint(g);
    repaint();
}
}

============================================================
//汇制棋盘的父类
package com.fivechess.view;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;

import javax.swing.JPanel;

/*

• 汇制棋盘的代码

• */
  public class ChessBoard2 extends JPanel {

  public Image chessBoardImage;

  public ChessBoard2() {
  chessBoardImage = Toolkit.getDefaultToolkit().getImage(“images/chessBoard.jpg”);
  }

  //汇制棋盘
  @Override
  public void paintComponent(Graphics g) {
  super.paintComponent(g);
  g.drawImage(chessBoardImage, 0, 0,null);
  }
  }
  =================================================================
  //汇制棋盘的类
  package com.fivechess.view;
  public class PCChessBoard2 extends ChessBoard2{
  }
  =================================================================
  修改PCBoard 类

package com.fivechess.view;
public class PCBoard extends Board {
private PCChessBoard2 pcchessboard2;//棋盘
public PCBoard() {
init();
}
public void init() {
pcchessboard2=new PCChessBoard2();
pcchessboard2.setBounds(200, 50, 600, 700);
pcchessboard2.setVisible(true);
add(pcchessboard2);
}
}

再次运行，进入后的界面，如下图：