鼻子内壁长水泡的照片:绘制四叶玫瑰线的JAVA程序 谁帮我看看哪有什么问题

import java.awt.*;
import java.applet.Apple;
import java.awt.event.*;
import java.awt.Color;
public class LX8_6 extends Applet implement ItemListener {
color color=Color.black;
check boxGroup cg1;
check box cb,cb2,cb3;
public void init(){
set Background(Color.white);
set Layout(new FlowLayout());
cg1=new Checkbox Group();
cb1=new Checkbox ("blue",cg1,true);
cb2=new Checkbox ("red",cg1,false);
cb3=new Checkbox("green",cg1,false);
cb1.add ItemListener (this);
cb2.add ItemListener (this);
cb3.add ItemListener (this);
add(cb1); add(cb2); add(cb3);
}
public void paint (Graphics g){
inr x0,y0,w1,h1;
w1=600;h1=300;x0=w1/2;y0=h1/2;
g.set Color(color);
g.drawLine(x0, x0,h1);
g.drawLine (0,y0,w1,y0);
int i,j=400,x,y;
double PI=3.14.angle.r;
while (j<200){
for(i=0;i<1023;i++){
angle=i*PI/512;
r=j*Math.sin (2*angle);
x=(int)Math.round (r*Math.cos(angle)*2);
y=(int)Math.round(r*Math.sia(angle));
g.fillOval (x0+x,y0+y,1,1);}
j=j+20;}
new Rose 1 ().set Visible(true);}
public void item StateChange(Item Event e){
if(e.getSouree()==cb1) color=Color.blue;
if(cb2.getState())color=Color,red;
if(cg1.getSelected Checkbox()==cb3) color=Color.green;
repaint();
}
}
}