Java实现一个简单的两人五子棋游戏(二) 画棋盘

棋盘模块：

画五子棋棋盘：19条横线、19条竖线

步骤一：显示棋盘

我有一张名为chessboard.png的棋盘，位置为根目录/res/drawable/chessboard/png，现在我要显示这张图片。

DrawChessBoard.java

package xchen.test.simpleGobang;

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

import javax.swing.JPanel;
public class DrawChessBoard extends JPanel{
	public Image boardImg;
	public DrawChessBoard() {
		boardImg = Toolkit.getDefaultToolkit().getImage("res/drawable/chessboard.png");
		if(boardImg == null)
			System.err.println("png do not exist");
	}	
	@Override
	protected void paintComponent(Graphics g) {
		// TODO Auto-generated method stub
		super.paintComponent(g);
		
		int imgWidth = boardImg.getWidth(this);
		int imgHeight = boardImg.getHeight(this);
		int FWidth = getWidth();
		int FHeight= getHeight();
		
		int x=(FWidth-imgWidth)/2;
		int y=(FHeight-imgHeight)/2;
		g.drawImage(boardImg, x, y, null);
	}
}

Main.java

package xchen.test.simpleGobang;

import java.awt.Container;
import javax.swing.JFrame;

import xchen.test.simpleGobang.DrawChessBoard;

public class Main extends JFrame{
	private DrawChessBoard drawChessBoard;
	public Main() {		
		drawChessBoard = new DrawChessBoard();
		
		//Frame标题
		setTitle("单机五子棋");
		
		Container containerPane =getContentPane();
		containerPane.add(drawChessBoard);		
	}
	public static void main(String[] args) {
		Main m = new Main();
		m.setVisible(true);
	}
}

运行一下

步骤二：为棋盘画上横竖线

DrawChessBoard.java

package xchen.test.simpleGobang;

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

import javax.swing.JPanel;
public class DrawChessBoard extends JPanel{
	public Image boardImg;
	final private int ROWS = 19;
	public DrawChessBoard() {
		boardImg = Toolkit.getDefaultToolkit().getImage("res/drawable/chessboard2.png");
		if(boardImg == null)
			System.err.println("png do not exist");
	}	
	@Override
	protected void paintComponent(Graphics g) {
		// TODO Auto-generated method stub
		super.paintComponent(g);
		
		int imgWidth = boardImg.getWidth(this);
		int imgHeight = boardImg.getHeight(this);
		int FWidth = getWidth();
		int FHeight= getHeight();
		
		int x=(FWidth-imgWidth)/2;
		int y=(FHeight-imgHeight)/2;
		g.drawImage(boardImg, x, y, null);
		
		int margin = x;
		int span_x=imgWidth/ROWS;
		int span_y=imgHeight/ROWS;
		//画横线
		for(int i=0;i

Main.java不变

运行一下

遇到的问题：

1）Eclipse不识别文件夹下的图片

问题：文件夹中有图片，但是在Eclipse项目栏中不显示

解决办法：在Eclipse中，选中根目录，F5 refresh，就显示出来了。