Java实现两人五子棋游戏(五) 判断是否有一方胜出

之前的两篇文章：java实现两人五子棋游戏(二) 画出棋盘；java实现两人五子棋游戏(三) 画出棋子；java实现两人五子棋游戏(四) 落子动作的实现，可以点击查看。

前面我们已经画好了棋盘、棋子并且可以*的落子了，那么接下来要实现的功能是判断是否有五连珠（暂时不考虑行棋方）。

我们采用遍历棋盘已经落子的位置，查看每个落子点，在它的上下，左右，左下右上，左上右下四个方向的任一方向上是否有五个连续的棋子。

第一步，对棋子类进行改造，之前我们的棋子类只有颜色信息和落子状态，现在要新增一个int型的数据，用于记录遍历过程中当前有几个珠子已知连续。

chessman.java

package xchen.test.simplegobang; 
 
public class chessman { 
  private int color;//1-white，0-black 
  private boolean placed = false; 
  int matchcount = 1; 
   
  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; 
  } 
} 

第二步，先从一个方向上判断是否有五连珠，这里采用左右方向作为尝试。

添加了一个iswin函数，用遍历整个棋盘上的有效棋子的方式，来进行胜出判断。

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.event.mouseevent; 
import java.awt.event.mouselistener; 
import java.awt.color; 
import javax.swing.jpanel; 
 
public class drawchessboard extends jpanel implements mouselistener{ 
  final static int black=0; 
  final static int white=1; 
  public int chesscolor = black; 
  int chessman_width=30; 
   
  public image boardimg; 
  final private int rows = 19; 
  chessman[][] chessstatus=new chessman[rows+1][rows+1];  
   
  public drawchessboard() { 
    boardimg = toolkit.getdefaulttoolkit().getimage("res/drawable/chessboard2.png"); 
    if(boardimg == null) 
      system.err.println("png do not exist"); 
     
    addmouselistener(this); 
  }   
  @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; 
     
    int span_x=imgwidth/rows; 
    int span_y=imgheight/rows; 
     
    g.drawimage(boardimg, x, y, null); 
     
    //画横线 
    for(int i=0;i<rows;i++) 
    { 
      g.drawline(x, y+i*span_y, fwidth-x,y+i*span_y); 
    } 
    //画竖线 
    for(int i=0;i<rows;i++) 
    { 
      g.drawline(x+i*span_x, y, x+i*span_x,fheight-y); 
    } 
     
    //画棋子 
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;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; 
          float radius_b=40; 
          float radius_w=80; 
          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); 
        } 
      } 
    } 
  } 
   
  @override 
  //当用户按下鼠标按钮时发生 
  public void mousepressed(mouseevent e) { 
    int point_x=e.getx(); 
    int point_y=e.gety(); 
     
    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; 
     
    int span_x=imgwidth/rows; 
    int span_y=imgheight/rows; 
     
    //system.out.println("press"); 
    int status_x = 0; 
    int status_y = 0; 
    if(point_x>=x && point_x<=x+imgwidth && point_y>=y && point_y <= y+imgheight) 
    { 
      //system.out.println("合法"); 
      for(int i=0;i<rows+1;i++) 
      { 
        if(point_x>=x-chessman_width/2+1+i*span_x) 
        { 
          if(point_x<=x+chessman_width/2-1+i*span_x)//如果是width/2会在中间点出现两个匹配值 
          { 
            //system.out.println("point x "+i+" "+point_x+" "+(x-chessman_width/2+i*span_x)+" "+(x+chessman_width/2+i*span_x)); 
            status_x = i; 
          } 
        } 
      } 
      for(int i=0;i<rows+1;i++) 
      { 
        if(point_y>=y-chessman_width/2+1+i*span_y) 
        { 
          if(point_y <= y+chessman_width/2-1+i*span_y) 
          { 
            //system.out.println("point y "+i+" "+point_y+" "+(y-chessman_width/2+1+i*span_y)+" "+(y+chessman_width/2-1+i*span_y)); 
            status_y = i; 
          } 
        } 
      } 
      chessman chessman = new chessman(black, true); 
      chessstatus[status_x][status_y]=chessman; 
      repaint(); 
      if(iswin(status_x, status_y, chessstatus)) 
      { 
        system.out.println("win!!!!!"); 
      } 
    } 
  } 
  @override 
  //当用户按下并松开鼠标按钮时发生 
  public void mouseclicked(mouseevent e) { 
    // todo auto-generated method stub 
  } 
  @override 
  public void mousereleased(mouseevent e) { 
    // todo auto-generated method stub 
     
  } 
  @override 
  public void mouseentered(mouseevent e) { 
    // todo auto-generated method stub 
     
  } 
  @override 
  public void mouseexited(mouseevent e) { 
    // todo auto-generated method stub  
  } 
   
  boolean iswin(int point_x,int point_y,chessman[][] cm) 
  { 
    //int matchcount = 1;//记录连珠的数目 
     
    //横向查找 
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;j++) 
      { 
        if(chessstatus[i][j]!=null&&chessstatus[i][j].getplaced()==true) 
        { 
          //system.out.println("iswin:"+i+" "+j); 
          //向右侧查找 
          for(int n=1;n<=4;n++) 
          { 
            if((i+n>=0)&&(i+n)<=rows) 
            { 
              if(chessstatus[i+n][j]!=null&&chessstatus[i+n][j].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" right count++:"+(i+n)+" "+j+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                break; 
              }   
            } 
          } 
          //向左侧查找 
          for(int n=1;n<=4;n++) 
          { 
            if((i-n>=0)&&(i-n)<=rows) 
            { 
              if(chessstatus[i-n][j]!=null&&chessstatus[i-n][j].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" "+"left count++:"+(i-n)+" "+j+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                if(chessstatus[i-n][j]!=null) 
                { 
                  chessstatus[i][j].matchcount = 1; 
                } 
                break; 
              } 
            } 
          } 
          chessstatus[i][j].matchcount=1;//refresh count 
        } 
      } 
    } 
    return false; 
     
  } 
} 

第三步，主模块不变，运行测试一下我们的算法是否正确

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.setsize(800, 800); 
    m.setvisible(true); 
  } 
} 

第四步，现在我们一个方向上的判断已经做好了，接下来补全其他三个方向上的判断代码

补足drawchessboard.java中的iswin()函数

package xchen.test.simplegobang; 
 
import java.awt.color; 
import java.awt.graphics; 
import java.awt.graphics2d; 
import java.awt.image; 
import java.awt.radialgradientpaint; 
import java.awt.toolkit; 
import java.awt.event.mouseevent; 
import java.awt.event.mouselistener; 
 
import javax.swing.jpanel; 
 
public class drawchessboard extends jpanel implements mouselistener{ 
  final static int black=0; 
  final static int white=1; 
  public int chesscolor = black; 
  int chessman_width=30; 
 
  public image boardimg; 
  final private int rows = 19; 
  chessman[][] chessstatus=new chessman[rows+1][rows+1];  
 
  public drawchessboard() { 
    boardimg = toolkit.getdefaulttoolkit().getimage("res/drawable/chessboard2.png"); 
    if(boardimg == null) 
      system.err.println("png do not exist"); 
 
    addmouselistener(this); 
  }   
  @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; 
 
    int span_x=imgwidth/rows; 
    int span_y=imgheight/rows; 
 
    g.drawimage(boardimg, x, y, null); 
 
    //画横线 
    for(int i=0;i<rows;i++) 
    { 
      g.drawline(x, y+i*span_y, fwidth-x,y+i*span_y); 
    } 
    //画竖线 
    for(int i=0;i<rows;i++) 
    { 
      g.drawline(x+i*span_x, y, x+i*span_x,fheight-y); 
    } 
 
    //画棋子 
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;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; 
          float radius_b=40; 
          float radius_w=80; 
          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); 
        } 
      } 
    } 
  } 
 
  @override 
  //当用户按下鼠标按钮时发生 
  public void mousepressed(mouseevent e) { 
    int point_x=e.getx(); 
    int point_y=e.gety(); 
 
    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; 
 
    int span_x=imgwidth/rows; 
    int span_y=imgheight/rows; 
 
    //system.out.println("press"); 
    int status_x = 0; 
    int status_y = 0; 
    if(point_x>=x && point_x<=x+imgwidth && point_y>=y && point_y <= y+imgheight) 
    { 
      //system.out.println("合法"); 
      for(int i=0;i<rows+1;i++) 
      { 
        if(point_x>=x-chessman_width/2+1+i*span_x) 
        { 
          if(point_x<=x+chessman_width/2-1+i*span_x)//如果是width/2会在中间点出现两个匹配值 
          { 
            //system.out.println("point x "+i+" "+point_x+" "+(x-chessman_width/2+i*span_x)+" "+(x+chessman_width/2+i*span_x)); 
            status_x = i; 
          } 
        } 
      } 
      for(int i=0;i<rows+1;i++) 
      { 
        if(point_y>=y-chessman_width/2+1+i*span_y) 
        { 
          if(point_y <= y+chessman_width/2-1+i*span_y) 
          { 
            //system.out.println("point y "+i+" "+point_y+" "+(y-chessman_width/2+1+i*span_y)+" "+(y+chessman_width/2-1+i*span_y)); 
            status_y = i; 
          } 
        } 
      } 
      chessman chessman = new chessman(black, true); 
      chessstatus[status_x][status_y]=chessman; 
      repaint(); 
      if(iswin(status_x, status_y, chessstatus)) 
      { 
        system.out.println("win!!!!!"); 
      } 
    } 
  } 
  @override 
  //当用户按下并松开鼠标按钮时发生 
  public void mouseclicked(mouseevent e) { 
    // todo auto-generated method stub 
  } 
  @override 
  public void mousereleased(mouseevent e) { 
    // todo auto-generated method stub 
 
  } 
  @override 
  public void mouseentered(mouseevent e) { 
    // todo auto-generated method stub 
 
  } 
  @override 
  public void mouseexited(mouseevent e) { 
    // todo auto-generated method stub  
  } 
 
  boolean iswin(int point_x,int point_y,chessman[][] cm) 
  {   
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;j++) 
      { 
        //横向查找 
        if(chessstatus[i][j]!=null&&chessstatus[i][j].getplaced()==true) 
        { 
          //向右侧查找 
          for(int n=1;n<=4;n++) 
          { 
            if((i+n>=0)&&(i+n)<=rows) 
            { 
              if(chessstatus[i+n][j]!=null&&chessstatus[i+n][j].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" right count++:"+(i+n)+" "+j+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                break; 
              }   
            } 
          } 
          //向左侧查找 
          for(int n=1;n<=4;n++) 
          { 
            if((i-n>=0)&&(i-n)<=rows) 
            { 
              if(chessstatus[i-n][j]!=null&&chessstatus[i-n][j].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" "+"left count++:"+(i-n)+" "+j+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                if(chessstatus[i-n][j]!=null) 
                { 
                  chessstatus[i][j].matchcount = 1; 
                } 
                break; 
              } 
            } 
          } 
          chessstatus[i][j].matchcount=1;//refresh count 
        } 
      } 
    } 
 
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;j++) 
      { 
        //纵向 
        if(chessstatus[i][j]!=null&&chessstatus[i][j].getplaced()==true) 
        { 
          //向下查找，左上角为坐标原点，y轴正方向向下 
          for(int n=1;n<=4;n++) 
          { 
            if((j+n>=0)&&(j+n)<=rows) 
            { 
              if(chessstatus[i][j+n]!=null&&chessstatus[i][j+n].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" up count++:"+(i)+" "+(j+n)+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                break; 
              }   
            } 
          } 
          //向上查找 
          for(int n=1;n<=4;n++) 
          { 
            if((j-n>=0)&&(j-n)<=rows) 
            { 
              if(chessstatus[i][j-n]!=null&&chessstatus[i][j-n].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" "+"left count++:"+(i)+" "+(j-n)+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                if(chessstatus[i][j-n]!=null) 
                { 
                  chessstatus[i][j].matchcount = 1; 
                } 
                break; 
              } 
            } 
          } 
          chessstatus[i][j].matchcount=1;//refresh count 
        } 
      } 
    } 
 
    //方向：左上右下 
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;j++) 
      { 
        //左上 
        if(chessstatus[i][j]!=null&&chessstatus[i][j].getplaced()==true) 
        { 
          //向下查找，左上角为坐标原点，y轴正方向向下 
          for(int n=1;n<=4;n++) 
          { 
            if((j-n>=0)&&(j-n)<=rows&&(i-n)>=0&&(i-n)<=rows) 
            { 
              if(chessstatus[i-n][j-n]!=null&&chessstatus[i-n][j-n].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" up count++:"+(i-n)+" "+(j-n)+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                break; 
              }   
            } 
          } 
          //右下 
          for(int n=1;n<=4;n++) 
          { 
            if((j+n>=0)&&(j+n)<=rows&&(i+n)>=0&&(i+n)<=rows) 
            { 
              if(chessstatus[i+n][j+n]!=null&&chessstatus[i+n][j+n].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" "+"left count++:"+(i+n)+" "+(j+n)+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                if(chessstatus[i+n][j+n]!=null) 
                { 
                  chessstatus[i][j].matchcount = 1; 
                } 
                break; 
              } 
            } 
          } 
          chessstatus[i][j].matchcount=1;//refresh count 
        } 
      } 
    } 
 
    //方向：左下右上 
    for(int i=0;i<rows+1;i++) 
    { 
      for(int j=0;j<rows+1;j++) 
      { 
        //左下 
        if(chessstatus[i][j]!=null&&chessstatus[i][j].getplaced()==true) 
        { 
          //向下查找，左上角为坐标原点，y轴正方向向下 
          for(int n=1;n<=4;n++) 
          { 
            if((j+n>=0)&&(j+n)<=rows&&(i-n)>=0&&(i-n)<=rows) 
            { 
              if(chessstatus[i-n][j+n]!=null&&chessstatus[i-n][j+n].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" up count++:"+(i-n)+" "+(j+n)+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                break; 
              }   
            } 
          } 
          //右上 
          for(int n=1;n<=4;n++) 
          { 
            if((j-n>=0)&&(j-n)<=rows&&(i+n)>=0&&(i+n)<=rows) 
            { 
              if(chessstatus[i+n][j-n]!=null&&chessstatus[i+n][j-n].getplaced()==true) 
              { 
                chessstatus[i][j].matchcount++; 
                system.out.println("pos:"+i+" "+j+" "+"left count++:"+(i+n)+" "+(j-n)+" count:"+chessstatus[i][j].matchcount); 
                if(chessstatus[i][j].matchcount==5) 
                { 
                  return true; 
                } 
              }else 
              { 
                if(chessstatus[i+n][j-n]!=null) 
                { 
                  chessstatus[i][j].matchcount = 1; 
                } 
                break; 
              } 
            } 
          } 
          chessstatus[i][j].matchcount=1;//refresh count 
        } 
      } 
    }     
 
    return false;   
  } 
} 

再运行一下

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