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连连看的代码（基本算法）加了部分注释
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import java.awt.*;
import java.awt.event.*;
public class lianliankan implements ActionListener
{
static String s="no"; //用来纪录点击按钮的信息
int x0=0,y0=0,x=0,y=0,n1=0,n2=0; //用来纪录按钮的位置信息
Frame f,f1;
Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b10; //用比较笨的方法添加了
Button b11,b12,b13,b14,b15,b16,b17,b18; //30个按钮来实现游戏界面
Button b19,b20,b21,b22,b23,b24,b25; //可以用数组实现，这是本人
Button b26,b27,b28,b29,b30,bc; //学java时，入门的联系，所以
Button b,ba,br,bt1,bt2; //有些东西很业余！！嘻嘻
Panel p1,p2,p3;
TextField t; //用来显示一些随机信息，方法是下面的guli().
Label l;
int d[][]={ //用来和界面的按钮建立映射关系
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0}
};
public static void main(String[] args)
{
lianliankan t=new lianliankan();
t.suiji();
t.go();
}
public void actionPerformed(ActionEvent e) //再来一次按钮的响应事件。
{
int d[][]={
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0}
};
this.d=d;
suiji();
f.setVisible(false);
f1.setVisible(false);
s="no";
go();
}
public void go()//初始化界面
{
l=new Label("亲爱的玩家，");
f=new Frame("连连看");
t=new TextField();
p2=new Panel();
p1=new Panel();
p3=new Panel();
bc=new Button("退出");
br=new Button("重列");
b=new Button();
b1=new Button(String.valueOf(d[1][1]));
b2=new Button(String.valueOf(d[1][2]));
b3=new Button(String.valueOf(d[1][3]));
b4=new Button(String.valueOf(d[1][4]));
b5=new Button(String.valueOf(d[1][5]));
b6=new Button(String.valueOf(d[2][1]));
b7=new Button(String.valueOf(d[2][2]));
b8=new Button(String.valueOf(d[2][3]));
b9=new Button(String.valueOf(d[2][4]));
b10=new Button(String.valueOf(d[2][5]));
b11=new Button(String.valueOf(d[3][1]));
b12=new Button(String.valueOf(d[3][2]));
b13=new Button(String.valueOf(d[3][3]));
b14=new Button(String.valueOf(d[3][4]));
b15=new Button(String.valueOf(d[3][5]));
b16=new Button(String.valueOf(d[4][1]));
b17=new Button(String.valueOf(d[4][2]));
b18=new Button(String.valueOf(d[4][3]));
b19=new Button(String.valueOf(d[4][4]));
b20=new Button(String.valueOf(d[4][5]));
b21=new Button(String.valueOf(d[5][1]));
b22=new Button(String.valueOf(d[5][2]));
b23=new Button(String.valueOf(d[5][3]));
b24=new Button(String.valueOf(d[5][4]));
b25=new Button(String.valueOf(d[5][5]));
b26=new Button(String.valueOf(d[6][1]));
b27=new Button(String.valueOf(d[6][2]));
b28=new Button(String.valueOf(d[6][3]));
b29=new Button(String.valueOf(d[6][4]));
b30=new Button(String.valueOf(d[6][5]));
p3.setLayout(null);
p1.setSize(250,300);
p2.setSize(100,40);
p3.setSize(300,30);
t.setSize(60,30);
l.setSize(70,30);
p1.setLayout(new GridLayout(6,5));
p1.setBackground(Color.pink);
p1.setLocation(100,100);
p2.setLocation(0,400);
p3.setLocation(50,50);
t.setLocation(230,2);
l.setLocation(150,2);
bc.setLocation(0,40);
br.setLocation(0,100);
f.add(p1);
f.add(p2);
f.add(p3);
p3.add(l);
p3.add(t);
p2.add(bc);
p2.add(br);
p1.add(b1);
p1.add(b2);
p1.add(b3);
p1.add(b4);
p1.add(b5);
p1.add(b6);
p1.add(b7);
p1.add(b8);
p1.add(b9);
p1.add(b10);
p1.add(b11);
p1.add(b12);
p1.add(b13);
p1.add(b14);
p1.add(b15);
p1.add(b16);
p1.add(b17);
p1.add(b18);
p1.add(b19);
p1.add(b20);
p1.add(b21);
p1.add(b22);
p1.add(b23);
p1.add(b24);
p1.add(b25);
p1.add(b26);
p1.add(b27);
p1.add(b28);
p1.add(b29);
p1.add(b30);
f.pack();
f.setBounds(280,100,500,450);
f.setResizable(false);
f.setVisible(true);
bc.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
ex();
}
});
br.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
chonglie();
}
});
b1.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(1,1,b1);
}
});
b2.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(1,2,b2);
}
});
b3.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(1,3,b3);
}
});
b4.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(1,4,b4);
}
});
b5.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(1,5,b5);
}
});
b6.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(2,1,b6);
}
});
b7.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(2,2,b7);
}
});
b8.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(2,3,b8);
}
});
b9.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(2,4,b9);
}
});
b10.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(2,5,b10);
}
});
b11.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(3,1,b11);
}
});
b12.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(3,2,b12);
}
});
b13.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(3,3,b13);
}
});
b14.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(3,4,b14);
}
});
b15.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(3,5,b15);
}
});
b16.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(4,1,b16);
}
});
b17.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(4,2,b17);
}
});
b18.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(4,3,b18);
}
});
b19.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(4,4,b19);
}
});
b20.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(4,5,b20);
}
});
b21.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(5,1,b21);
}
});
b22.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(5,2,b22);
}
});
b23.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(5,3,b23);
}
});
b24.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(5,4,b24);
}
});
b25.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(5,5,b25);
}
});
b26.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(6,1,b26);
}
});
b27.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(6,2,b27);
}
});
b28.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(6,3,b28);
}
});
b29.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(6,4,b29);
}
});
b30.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
wei(6,5,b30);
}
});
}
public void ex() //退出界面，可用diolog来实现有模式的类型，更加符合
{
f1=new Frame("游戏作业");
f1.setLayout(new GridLayout(1,1));
bt1=new Button("确定退出");
bt2=new Button("再来一局");
f1.add(bt1);
f1.add(bt2);
f1.pack();
f1.setBounds(400,250,90,60);
f1.setResizable(false);
f1.show();
f1.setVisible(true);
bt1.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
{
System.exit(0);
}
});
bt2.addActionListener(this);
}
public void suiji() //产生随机数，来填充游戏界面对应的数组的各个位置
{
int m,n,k=0,k1,k2,k3;
for(m=1;m=15;m++)
{
k1=(int)(Math.random()*25+1);
for(n=1;n=2;n++)
{
k2=(int)(Math.random()*6+1);
k3=(int)(Math.random()*5+1);
while(d[k2][k3]!=0 k!=30)
{
k2=(int)(Math.random()*6+1);
k3=(int)(Math.random()*5+1);
}
this.d[k2][k3]=k1;
k++;
}
}
}
public void guli() //随机信息
{
int l=0;
t.setText("");
l=(int)(Math.random()*10);
System.out.println(l);
switch(l)
{
case 1:
t.setText("好！加油！");
break;
case 3:
t.setText("你真棒！");
break;
case 5:
t.setText("加快速度！");
break;
case 6:
t.setText("不错啊！");
break;
case 8:
t.setText("加油吧！");
break;
case 9:
t.setText("够聪明!");
break;
default:
break;
}
}
public void chonglie() //重列方法
{
int save[],i,j,n=0,k2,k3,k;
int d[][]={
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0},
{0,0,0,0,0,0,0}
};
save=new int[30];
for(n=0;n30;n++)
save[n]=0; //定义一个数组来保存当前的每个按钮位置上的信息
n=0;
for(i=0;i=6;i++)
for(j=0;j=5;j++)
{
if(this.d[i][j]!=0)
{
save[n]=this.d[i][j];
n++;
}
}
n=n-1;
this.d=d;
while(n=0) //产生随机位置，放置按钮
{
k2=(int)(Math.random()*6+1);
k3=(int)(Math.random()*5+1);
while(d[k2][k3]!=0)
{
k2=(int)(Math.random()*6+1);
k3=(int)(Math.random()*5+1);
}
this.d[k2][k3]=save[n];
n--;
}
f.setVisible(false);
s="no"; //这里一定要将按钮点击信息归为初始
go();
ling();
}
public void ling() //将数组中为零的成员对应的按钮消去
{ //用按钮类型的数组实现会简化得多，
if(d[1][1]==0)
b1.setVisible(false);
if(d[1][2]==0)
b2.setVisible(false);
if(d[1][3]==0)
b3.setVisible(false);
if(d[1][4]==0)
b4.setVisible(false);
if(d[1][5]==0)
b5.setVisible(false);
if(d[2][1]==0)
b6.setVisible(false);
if(d[2][2]==0)
b7.setVisible(false);
if(d[2][3]==0)
b8.setVisible(false);
if(d[2][4]==0)
b9.setVisible(false);
if(d[2][5]==0)
b10.setVisible(false);
if(d[3][1]==0)
b11.setVisible(false);
if(d[3][2]==0)
b12.setVisible(false);
if(d[3][3]==0)
b13.setVisible(false);
if(d[3][4]==0)
b14.setVisible(false);
if(d[3][5]==0)
b15.setVisible(false);
if(d[4][1]==0)
b16.setVisible(false);
if(d[4][2]==0)
b17.setVisible(false);
if(d[4][3]==0)
b18.setVisible(false);
if(d[4][4]==0)
b19.setVisible(false);
if(d[4][5]==0)
b20.setVisible(false);
if(d[5][1]==0)
b21.setVisible(false);
if(d[5][2]==0)
b22.setVisible(false);
if(d[5][3]==0)
b23.setVisible(false);
if(d[5][4]==0)
b24.setVisible(false);
if(d[5][5]==0)
b25.setVisible(false);
if(d[6][1]==0)
b26.setVisible(false);
if(d[6][2]==0)
b27.setVisible(false);
if(d[6][3]==0)
b28.setVisible(false);
if(d[6][4]==0)
b29.setVisible(false);
if(d[6][5]==0)
b30.setVisible(false);
}
public void wei(int w1,int w2,Button bz) //判断并纪录每次点击按钮的信息
{ //当两次的按钮相同才能消去
if((s.trim()).equals("no"))
{
s=b1.getLabel();
x0=w1;
y0=w2;
n1=d[x0][y0];
b=bz;
x=w1;
y=w2;
n2=d[x][y];
ba=bz;
}
else
{
x0=x;
y0=y;
n1=d[x0][y0];
b=ba;
x=w1;
y=w2;
n2=d[x][y];
ba=bz;
if(n1==n2 ba!=b)
{
xiao();
}
}
}
public void xiao() //这里是整个游戏最重要的部分，就是判断两个按钮在信息
{ //相同的情况下能不能消去。仔细分析，不一条条注释
int i=0, j=0,n=0,k=0;
if((x0==x (y0==y+1||y0==y-1)) || ((x0==x+1||x0==x-1)(y0==y))) //相邻的情况
{
ba.setVisible(false);
b.setVisible(false);
guli();
s="no";
d[x0][y0]=0;
d[x][y]=0;
}
else
{
for (j=0;j7;j++ ) //两个按钮按行分析，看能否消去
{
if (d[x0][j]==0)
{
if (yj)
{
for (i=y-1;i=j;i-- )
{
if (d[x][i]!=0)
{
k=0;
break;
}
else
{
k=1;
}
}
if (k==1)
{
if (y0j)
{
for (i=y0-1;i=j ;i-- )
{
if (d[x0][i]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
if (y0j)
{
for (i=y0+1;i=j ;i++)
{
if (d[x0][i]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
}
}
if (yj)
{
for (i=y+1;i=j ;i++ )
{
if (d[x][i]!=0)
{
k=0;
break;
}
else
{
k=1;
}
}
if (k==1)
{
if (y0j)
{
for (i=y0-1;i=j ;i-- )
{
if (d[x0][i]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
if (y0j)
{
for (i=y0+1;i=j ;i++)
{
if (d[x0][i]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
}
}
if (y==j )
{
if (y0j)
{
for (i=y0-1;i=j ;i-- )
{
if (d[x0][i]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
if (y0j)
{
for (i=y0+1;i=j ;i++)
{
if (d[x0][i]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
}
}
if (k==2)
{ if (x0==x)
{
b.setVisible(false);
ba.setVisible(false);
guli();
s="no";
k=0;
d[x0][y0]=0;
d[x][y]=0;
}
if (x0x)
{
for (n=x0;n=x-1;n++ )
{
if (d[n][j]!=0)
{
k=0;
break;
}
if(d[n][j]==0 n==x-1)
{
b.setVisible(false);
ba.setVisible(false);
guli();
s="no";
k=0;
d[x0][y0]=0;
d[x][y]=0;
}
}
}
if (x0x)
{
for (n=x0;n=x+1 ;n-- )
{
if (d[n][j]!=0)
{
k=0;
break;
}
if(d[n][j]==0 n==x+1)
{
b.setVisible(false);
ba.setVisible(false);
guli();
s="no";
k=0;
d[x0][y0]=0;
d[x][y]=0;
}
}
}
}
}
for (i=0;i8;i++ ) //按列分析，看能不能消去
{
if (d[i][y0]==0)
{
if (xi)
{
for (j=x-1;j=i ;j-- )
{
if (d[j][y]!=0)
{
k=0;
break;
}
else
{
k=1;
}
}
if (k==1)
{
if (x0i)
{
for (j=x0-1;j=i ;j-- )
{
if (d[j][y0]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
if (x0i)
{
for (j=x0+1;j=i;j++ )
{
if (d[j][y0]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
}
}
if (xi)
{
for (j=x+1;j=i;j++ )
{
if (d[j][y]!=0)
{
k=0;
break;
}
else
{
k=1;
}
}
if (k==1)
{
if (x0i)
{
for (j=x0-1;j=i ;j-- )
{
if (d[j][y0]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
if (x0i)
{
for (j=x0+1;j=i ;j++ )
{
if (d[j][y0]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
}
}
if (x==i)
{
if (x0i)
{
for (j=x0-1;j=i ;j-- )
{
if (d[j][y0]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
if (x0i)
{
for (j=x0+1;j=i ;j++ )
{
if (d[j][y0]!=0)
{
k=0;
break;
}
else
{
k=2;
}
}
}
}
}
if (k==2)
{
if (y0==y)
{
b.setVisible(false);
ba.setVisible(false);
guli();
s="no";
k=0;
d[x0][y0]=0;
d[x][y]=0;
}
if (y0y)
{
for (n=y0;n=y-1 ;n++ )
{
if (d[i][n]!=0)
{
k=0;
break;
}
if(d[i][n]==0 n==y-1)
{
b.setVisible(false);
ba.setVisible(false);
guli();
s="no";
k=0;
d[x0][y0]=0;
d[x][y]=0;
}
}
}
if (y0y)
{
for (n=y0;n=y+1 ;n--)
{
if (d[i][n]!=0)
{
k=0;
break;
}
if(d[i][n]==0 n==y+1)
{
b.setVisible(false);
ba.setVisible(false);
guli();
s="no";
k=0;
d[x0][y0]=0;
d[x][y]=0;
}
}
}
}
}
}
}
}
importjavax.swing.*;\x0d\x0aimportjava.awt.*;\x0d\x0aimportjava.awt.event.*;\x0d\x0apublicclasslianliankanimplementsActionListener\x0d\x0a{\x0d\x0aJFramemainFrame;//主面板\x0d\x0aContainerthisContainer;\x0d\x0aJPanelcenterPanel,southPanel,northPanel;//子面板\x0d\x0aJButtondiamondsButton[][]=newJButton[6][5];//游戏按钮数组\x0d\x0aJButtonexitButton,resetButton,newlyButton;//退出，重列，重新开始按钮\x0d\x0aJLabelfractionLable=newJLabel("0");//分数标签\x0d\x0aJButtonfirstButton,secondButton;//分别记录两次被选中的按钮\x0d\x0aintgrid[][]=newint[8][7];//储存游戏按钮位置\x0d\x0astaticbooleanpressInformation=false;//判断是否有按钮被选中\x0d\x0aintx0=0,y0=0,x=0,y=0,fristMsg=0,secondMsg=0,validateLV;//游戏按钮的位置坐标\x0d\x0ainti,j,k,n;//消除方法控制\x0d\x0apublicvoidinit(){\x0d\x0amainFrame=newJFrame("JKJ连连看");\x0d\x0athisContainer=mainFrame.getContentPane();\x0d\x0athisContainer.setLayout(newBorderLayout());\x0d\x0acenterPanel=newJPanel();\x0d\x0asouthPanel=newJPanel();\x0d\x0anorthPanel=newJPanel();\x0d\x0athisContainer.add(centerPanel,"Center");\x0d\x0athisContainer.add(southPanel,"South");\x0d\x0athisContainer.add(northPanel,"North");\x0d\x0acenterPanel.setLayout(newGridLayout(6,5));\x0d\x0afor(intcols=0;cols=0){\x0d\x0acols=(int)(Math.random()*6+1);\x0d\x0arows=(int)(Math.random()*5+1);\x0d\x0awhile(grid[cols][rows]!=0){\x0d\x0acols=(int)(Math.random()*6+1);\x0d\x0arows=(int)(Math.random()*5+1);\x0d\x0a}\x0d\x0athis.grid[cols][rows]=save[n];\x0d\x0an--;\x0d\x0a}\x0d\x0amainFrame.setVisible(false);\x0d\x0apressInformation=false;//这里一定要将按钮点击信息归为初始\x0d\x0ainit();\x0d\x0afor(inti=0;ij){//如果第二个按钮的Y坐标大于空按钮的Y坐标说明第一按钮在第二按钮左边\x0d\x0afor(i=y-1;i=j;i--){//判断第二按钮左侧直到第一按钮中间有没有按钮\x0d\x0aif(grid[x][i]!=0){\x0d\x0ak=0;\x0d\x0abreak;\x0d\x0a}\x0d\x0aelse//K=1说明通过了第一次验证\x0d\x0a}\x0d\x0aif(k==1){\x0d\x0alinePassOne();\x0d\x0a}\x0d\x0a}\x0d\x0aif(yx){\x0d\x0afor(n=x0;n=x+1;n--){\x0d\x0aif(grid[n][j]!=0){\x0d\x0ak=0;\x0d\x0abreak;\x0d\x0a}\x0d\x0aif(grid[n][j]==0n==x+1){\x0d\x0aremove();\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0afor(i=0;ii){\x0d\x0afor(j=x-1;j=i;j--){\x0d\x0aif(grid[j][y]!=0){\x0d\x0ak=0;\x0d\x0abreak;\x0d\x0a}\x0d\x0aelse\x0d\x0a}\x0d\x0aif(k==1){\x0d\x0arowPassOne();\x0d\x0a}\x0d\x0a}\x0d\x0aif(xy){\x0d\x0afor(n=y0;n=y+1;n--){\x0d\x0aif(grid[i][n]!=0){\x0d\x0ak=0;\x0d\x0abreak;\x0d\x0a}\x0d\x0aif(grid[i][n]==0n==y+1){\x0d\x0aremove();\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0apublicvoidlinePassOne(){\x0d\x0aif(y0j){//第一按钮同行空按钮在左边\x0d\x0afor(i=y0-1;i=j;i--){//判断第一按钮同左侧空按钮之间有没按钮\x0d\x0aif(grid[x0][i]!=0){\x0d\x0ak=0;\x0d\x0abreak;\x0d\x0a}\x0d\x0aelse//K=2说明通过了第二次验证\x0d\x0a}\x0d\x0a}\x0d\x0aif(y0i){\x0d\x0afor(j=x0-1;j=i;j--){\x0d\x0aif(grid[j][y0]!=0){\x0d\x0ak=0;\x0d\x0abreak;\x0d\x0a}\x0d\x0aelse\x0d\x0a}\x0d\x0a}\x0d\x0aif(x0
回答于 2022-12-14
表1. CheckerDrag.java
// CheckerDrag.javaimport java.awt.*;import java.awt.event.*;public class CheckerDrag extends java.applet.Applet{ // Dimension of checkerboard square. // 棋盘上每个小方格的尺寸 final static int SQUAREDIM = 40; // Dimension of checkerboard -- includes black outline. // 棋盘的尺寸 – 包括黑色的轮廓线 final static int BOARDDIM = 8 * SQUAREDIM + 2; // Dimension of checker -- 3/4 the dimension of a square. // 棋子的尺寸 – 方格尺寸的3/4 final static int CHECKERDIM = 3 * SQUAREDIM / 4; // Square colors are dark green or white. // 方格的颜色为深绿色或者白色 final static Color darkGreen = new Color (0, 128, 0); // Dragging flag -- set to true when user presses mouse button over checker // and cleared to false when user releases mouse button. // 拖动标记 --当用户在棋子上按下鼠标按键时设为true， // 释放鼠标按键时设为false boolean inDrag = false; // Left coordinate of checkerboard's upper-left corner. // 棋盘左上角的左方向坐标 int boardx; // Top coordinate of checkerboard's upper-left corner. //棋盘左上角的上方向坐标 int boardy; // Left coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原点(左上角)的左方向坐标 int ox; // Top coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原点(左上角)的上方向坐标 int oy; // Left displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按键时的鼠标坐标与棋子矩形原点之间的左方向位移 int relx; // Top displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按键时的鼠标坐标与棋子矩形原点之间的上方向位移 int rely; // Width of applet drawing area. // applet绘图区域的宽度 int width; // Height of applet drawing area. // applet绘图区域的高度 int height; // Image buffer. // 图像缓冲 Image imBuffer; // Graphics context associated with image buffer. // 图像缓冲相关联的图形背景 Graphics imG; public void init () { // Obtain the size of the applet's drawing area. // 获取applet绘图区域的尺寸 width = getSize ().width; height = getSize ().height; // Create image buffer. // 创建图像缓冲 imBuffer = createImage (width, height); // Retrieve graphics context associated with image buffer. // 取出图像缓冲相关联的图形背景 imG = imBuffer.getGraphics (); // Initialize checkerboard's origin, so that board is centered. // 初始化棋盘的原点，使棋盘在屏幕上居中 boardx = (width - BOARDDIM) / 2 + 1; boardy = (height - BOARDDIM) / 2 + 1; // Initialize checker's rectangle's starting origin so that checker is // centered in the square located in the top row and second column from // the left. // 初始化棋子矩形的起始原点，使得棋子在第一行左数第二列的方格里居中 ox = boardx + SQUAREDIM + (SQUAREDIM - CHECKERDIM) / 2 + 1; oy = boardy + (SQUAREDIM - CHECKERDIM) / 2 + 1; // Attach a mouse listener to the applet. That listener listens for // mouse-button press and mouse-button release events. // 向applet添加一个用来监听鼠标按键的按下和释放事件的鼠标监听器 addMouseListener (new MouseAdapter () { public void mousePressed (MouseEvent e) { // Obtain mouse coordinates at time of press. // 获取按键时的鼠标坐标 int x = e.getX (); int y = e.getY (); // If mouse is over draggable checker at time // of press (i.e., contains (x, y) returns // true), save distance between current mouse // coordinates and draggable checker origin // (which will always be positive) and set drag // flag to true (to indicate drag in progress). // 在按键时如果鼠标位于可拖动的棋子上方 // （也就是contains (x, y)返回true），则保存当前 // 鼠标坐标与棋子的原点之间的距离（始终为正值）并且 // 将拖动标志设为true（用来表明正处在拖动过程中） if (contains (x, y)) { relx = x - ox; rely = y - oy; inDrag = true; } } boolean contains (int x, int y) { // Calculate center of draggable checker. // 计算棋子的中心位置 int cox = ox + CHECKERDIM / 2; int coy = oy + CHECKERDIM / 2; // Return true if (x, y) locates with bounds // of draggable checker. CHECKERDIM / 2 is the // radius. // 如果(x, y)仍处于棋子范围内则返回true // CHECKERDIM / 2为半径 return (cox - x) * (cox - x) + (coy - y) * (coy - y) CHECKERDIM / 2 * CHECKERDIM / 2; } public void mouseReleased (MouseEvent e) { // When mouse is released, clear inDrag (to // indicate no drag in progress) if inDrag is // already set. // 当鼠标按键被释放时，如果inDrag已经为true， // 则将其置为false（用来表明不在拖动过程中） if (inDrag) inDrag = false; } }); // Attach a mouse motion listener to the applet. That listener listens // for mouse drag events. //向applet添加一个用来监听鼠标拖动事件的鼠标运动监听器 addMouseMotionListener (new MouseMotionAdapter () { public void mouseDragged (MouseEvent e) { if (inDrag) { // Calculate draggable checker's new // origin (the upper-left corner of // the checker rectangle). // 计算棋子新的原点（棋子矩形的左上角） int tmpox = e.getX () - relx; int tmpoy = e.getY () - rely; // If the checker is not being moved // (at least partly) off board, // assign the previously calculated // origin (tmpox, tmpoy) as the // permanent origin (ox, oy), and // redraw the display area (with the // draggable checker at the new // coordinates). // 如果棋子（至少是棋子的一部分）没有被 // 移出棋盘，则将之前计算的原点 // (tmpox, tmpoy)赋值给永久性的原点(ox, oy)， // 并且刷新显示区域（此时的棋子已经位于新坐标上） if (tmpox boardx tmpoy boardy tmpox + CHECKERDIM boardx + BOARDDIM tmpoy + CHECKERDIM boardy + BOARDDIM) { ox = tmpox; oy = tmpoy; repaint (); } } } }); } public void paint (Graphics g) { // Paint the checkerboard over which the checker will be dragged. // 在棋子将要被拖动的位置上绘制棋盘 paintCheckerBoard (imG, boardx, boardy); // Paint the checker that will be dragged. // 绘制即将被拖动的棋子 paintChecker (imG, ox, oy); // Draw contents of image buffer. // 绘制图像缓冲的内容 g.drawImage (imBuffer, 0, 0, this); } void paintChecker (Graphics g, int x, int y) { // Set checker shadow color. // 设置棋子阴影的颜色 g.setColor (Color.black); // Paint checker shadow. // 绘制棋子的阴影 g.fillOval (x, y, CHECKERDIM, CHECKERDIM); // Set checker color. // 设置棋子颜色 g.setColor (Color.red); // Paint checker. // 绘制棋子 g.fillOval (x, y, CHECKERDIM - CHECKERDIM / 13, CHECKERDIM - CHECKERDIM / 13); } void paintCheckerBoard (Graphics g, int x, int y) { // Paint checkerboard outline. // 绘制棋盘轮廓线 g.setColor (Color.black); g.drawRect (x, y, 8 * SQUAREDIM + 1, 8 * SQUAREDIM + 1); // Paint checkerboard. // 绘制棋盘 for (int row = 0; row 8; row++) { g.setColor (((row 1) != 0) ? darkGreen : Color.white); for (int col = 0; col 8; col++) { g.fillRect (x + 1 + col * SQUAREDIM, y + 1 + row * SQUAREDIM, SQUAREDIM, SQUAREDIM); g.setColor ((g.getColor () == darkGreen) ? Color.white : darkGreen); } } } // The AWT invokes the update() method in response to the repaint() method // calls that are made as a checker is dragged. The default implementation // of this method, which is inherited from the Container class, clears the // applet's drawing area to the background color prior to calling paint(). // This clearing followed by drawing causes flicker. CheckerDrag overrides // update() to prevent the background from being cleared, which eliminates // the flicker. // AWT调用了update()方法来响应拖动棋子时所调用的repaint()方法。该方法从 // Container类继承的默认实现会在调用paint()之前，将applet的绘图区域清除 // 为背景色，这种绘制之后的清除就导致了闪烁。CheckerDrag重写了update()来 // 防止背景被清除，从而消除了闪烁。 public void update (Graphics g) { paint (g); }}