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實現鼠標畫圖的Java程序

2013-11-23 19:09:50  來源: Java核心技術 

  

  import javaawtColor;

  import javaawtFrame;

  import javaawtGraphics;

  import javaawtPoint;

  import javaawteventMouseAdapter;

  import javaawteventMouseEvent;

  import javaawteventMouseListener;

  import javautilArrayList;

  import javautilIterator;

  public class MyMouseAdapter {

  public static void main(String[] args) {

  new MyFrame(drawing);

  }

  }

  class MyFrame extends Frame{

  ArrayList points=null;

  MyFrame(String s){

  super(s);

  points=new ArrayList();

  setLayout(null);

  setBounds();

  thissetBackground(new Color());

  setVisible(true);

  thisaddMouseListener(new Monitor());

  }

  public void paint(Graphics g){

  Iterator i=erator();

  while(ihasNext()){

  Point p=(Point)inext();

  gsetColor(Colorblue);

  gfillOval(pxpy );

  }

  }

  public void addPoint(Point p){

  pointsadd(p);

  }

  }

  class Monitor extends MouseAdapter{ //MouseAdapter實現了MouseListener接口

  public void mousePressed(MouseEvent e){

  MyFrame f=(MyFrame)egetSource();

  faddPoint(new Point(egetX()egetY()));

  frepaint(); //讓Frame強制經行重畫

  }

  }


From:http://tw.wingwit.com/Article/program/Java/hx/201311/26376.html
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