clonedemo.java

java经典的源代码 我非常喜欢这个源代码 对于编程很有好处

//cloneDemo.Java
import java.awt.*;
import java.applet.Applet;
class DrawCircle implements Cloneable
{
        int x,y,width,height;
public void setPosition(int x1, int y1)
{
        x=x1;
y=y1;
}
public void setCircle(int w,int h)
{
        width=w;
        height=h;
}
public void draw(Graphics g)
{
        g.drawOval(x,y,width,height);
}
protected Object clone()
{
        try
        {
                DrawCircle clonedObject=(DrawCircle)super.clone();
                return clonedObject;
        }
        catch(CloneNotSupportedException e)
{
                throw new InternalError();
        }
}
}
public class cloneDemo extends Applet
{
        public void paint(Graphics g)
        {
DrawCircle arr[]=new DrawCircle[10];
DrawCircle a=new DrawCircle();
a.setPosition(20,20);
a.setCircle(50,50);
                for(int i=0;i<10;i++)
{
arr[i]=(DrawCircle)a.clone();
arr[i].setPosition(20+i*20,20+i*4);
arr[i].draw(g);
}
}
}