溫暖午後的金針田__孕育有趣的創新

這是圈圈叉叉遊戲，目前還沒有計分機制

Tip: 用矩陣儲存格子是否被畫過；

用MouseListener的Pressed物件來抓取滑鼠所點選的位置，以得知要畫記在哪裡；

在paint()中，用if及布林變數來分階段畫出隔線與圈叉；

運用除法及家法運算 將同格子範圍內的x,y值統一訂至格子中心；

Int在除法上有瑕疵，運算過程有個地方理應為負數，卻自動進位成0，要透過(int)(Math.floor((mx-100.0)/100));來解決；但也可以直接在範圍限制中用上下界值來判斷

package ex02;

import java.awt.*;

import java.awt.event.*;

public class mm extends Frame implements WindowListener, MouseListener{

int mx=100,my=100;

boolean first=true;int mode = 0;

int[][] map  = new int[3][3];

public static void main(String[] args){

mm p = new mm();

}

mm(){

this.setSize(1000,1000);

this.setLocation(100,100);

this.setLayout(null);

for(int i=0;i<3;i++)

for(int j=0;j<3;j++){

map[i][j]=0;

}

this.addWindowListener(this);/*interface*/

this.addMouseListener(this);/*interface*/

this.setVisible(true);

}

/*Override*/

public void update(Graphics g){paint(g);}

public void paint(Graphics g){

if(first==true){

for(int i=0;i<4;i++){

g.drawLine(100+100*i, 100, 100+100*i, 400);

g.drawLine(100, 100+100*i, 400, 100+100*i);

first = false;

}

}else{

if(/**(mx>100)&&**/(mx<400)&&/**(my>100)&&**/(my<400)){

//g.setColor(new Color(fun.Rand(0,255),fun.Rand(0,255),fun.Rand(0,255)));

int px,py,nx,ny;

/**px = (int)((mx-100)/100);**//*value changed for opt*/

/**py = (int)((my-100)/100);**//*value changed for opt*/

px = (int)(Math.floor((mx-100.0)/100));/*deal with integer problem of set -1 to 0*/

py = (int)(Math.floor((my-100.0)/100));/*deal with integer problem of set -1 to 0*/

nx = 150+px*100;/*for drawing*/

ny = 150+py*100;/*for drawing*/

/*System.out.println("px="+px+"py="+py);*/

if(map[px][py]==0){

if(mode==0){

g.drawOval(nx-30, ny-30, 61, 61); /*畫圈圈*/

mode = 1-mode;

}else if(mode==1){

g.drawLine(nx+30, ny+30, nx-30, ny-30); /*畫叉叉*/

g.drawLine(nx-30, ny+30, nx+30, ny-30);

mode = 1-mode;

}

map[px][py]=1;

}

}

}

}

/*WindowListener Event*/

@Override

public void windowOpened(WindowEvent e) {}

@Override

public void windowClosing(WindowEvent e) {dispose();}

@Override

public void windowClosed(WindowEvent e) {}

@Override

public void windowIconified(WindowEvent e) {}

@Override

public void windowDeiconified(WindowEvent e) {}

@Override

public void windowActivated(WindowEvent e) {}

@Override

public void windowDeactivated(WindowEvent e) {}

/*MouseListener Event*/

@Override

public void mouseClicked(MouseEvent e) {}

@Override

public void mousePressed(MouseEvent e) {

mx=e.getX();

my=e.getY();

repaint();

}

@Override

public void mouseReleased(MouseEvent e) {}

@Override

public void mouseEntered(MouseEvent e) {}

@Override

public void mouseExited(MouseEvent e) {}

}