上一篇文章講的是Java實現兩人五子棋遊戲(二) 畫出棋盤，已經畫好棋盤，接下來要實現控制功能，主要功能：
1）選擇棋子
2）畫棋子
3）判斷勝負
4）交換行棋方
先實現畫棋子PART
-------------畫棋子代碼示例如下--------------
首先，定義一個棋子類，這個類有兩個屬性，棋子顏色（0-表示黑色，1-表示白色），是否落子（我計劃用一個二維數組才存儲棋子的落子信息）
Chessman.java
package xchen.test.simpleGobang; public class Chessman { private int color;//1-white，0-black private boolean placed = false; public Chessman(int color,boolean placed){ this.color=color; this.placed=placed; } public boolean getPlaced() { return placed; } public void setPlaced(boolean placed) { this.placed = placed; } public int getColor() { return color; } public void setColor(int color) { this.color = color; } }接著我們上一部分的畫好棋盤的代碼部分，新增畫棋子的代碼，我用兩個棋子（一白一黑，分別位於棋盤的【8，8】，【7，7】）來檢驗畫棋子的代碼
DrawChessBoard.java
package xchen.test.simpleGobang; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.RadialGradientPaint; import java.awt.Image; import java.awt.Toolkit; import java.awt.Color; import javax.swing.JPanel; public class DrawChessBoard extends JPanel{ final static int BLACK=0; final static int WHITE=1; public int chessColor = BLACK; public Image boardImg; final private int ROWS = 19; Chessman[][] chessStatus=new Chessman[ROWS][ROWS]; public DrawChessBoard() { boardImg = Toolkit.getDefaultToolkit().getImage("res/drawable/chessboard2.png"); if(boardImg == null) System.err.println("png do not exist"); //test draw chessman part simple Chessman chessman=new Chessman(0, true); chessStatus[7][7]=chessman; Chessman chessman2 = new Chessman(1, true); chessStatus[8][8]=chessman2; //test draw chessman part simple } @Override protected void paintComponent(Graphics g) { // TODO Auto-generated method stub super.paintComponent(g); int imgWidth = boardImg.getHeight(this); int imgHeight = boardImg.getWidth(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; //畫橫線for(int i=0;i<ROWS;i++) { g.drawLine(x, y+i*span_y, FWidth-x,y+i*span_y); } //畫豎線for(int i=0;i<ROWS;i++) { g.drawLine(x+i*span_x, y, x+i*span_x,FHeight-y); } //畫棋子for(int i=0;i<ROWS;i++) { for(int j=0;j<ROWS;j++) { if(chessStatus[i][j]!=null&&chessStatus[i][j].getPlaced()==true) { System.out.println("draw chessman "+i+" "+j); int pos_x=x+i*span_x; int pos_y=y+j*span_y; int chessman_width=20; float radius_b=20; float radius_w=50; float[] fractions = new float[]{0f,1f}; java.awt.Color[] colors_b = new java.awt.Color[]{Color.BLACK,Color.WHITE}; Color[] colors_w = new Color[]{Color.WHITE,Color.BLACK}; RadialGradientPaint paint; if(chessStatus[i][j].getColor()==1) { System.out.println("draw white chess"); paint = new RadialGradientPaint(pos_x-chessman_width/2f, pos_y-chessman_width/2f, radius_w*2, fractions, colors_w); }else{ System.out.println("draw black chess"); paint = new RadialGradientPaint(pos_x-chessman_width/2f, pos_y-chessman_width/2f, radius_b*2, fractions, colors_b); } ((Graphics2D)g).setPaint(paint); ((Graphics2D)g).fillOval(pos_x-chessman_width/2,pos_y-chessman_width/2,chessman_width,chessman_width); } } } } }主模塊代碼不變
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標題setTitle("單機五子棋"); Container containerPane =getContentPane(); containerPane.add(drawChessBoard); } public static void main(String[] args) { Main m = new Main(); m.setSize(800, 800); m.setVisible(true); } }運行一下！
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