📄 mouse.java
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import java.io.*;<br />import java.applet.*;<br />import java.awt.*;<br />import java.awt.event.*;<br />import java.util.*;<br /><br />public class Paint extends Applet {<br /> Vector v = new Vector();<br /> public void paint(Graphics g) {<br /> int [] x,y;//两个引用<br /> x = new int [v.size()];<br /> y = new int [v.size()];<br /> for(int i=0;i<v.size();++i) {<br /> Point p = (Point)v.get(i);<br /> x=p.x;<br /> y=p.y;<br /> }<br /> g.drawPolyline(x,y,v.size());<br /> //g.drawString("Hello",10,10);<br /> //System.out.println("Hello");<br /> }<br /> public void init() {<br /> addMouseMotionListener(<br /> new MouseMotionAdapter(){<br /> public void mouseDragged(MouseEvent e) {<br /> Point p = e.getPoint();//得到x ,y的值<br /> v.add(p);<br /> repaint();<br /> //System.out.println(p);<br /> System.out.println(v.size());<br /> }<br /> }); <br /> } <br /> }<br />//<applet code = Paint width=200 height=200></applet>
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