Drawing multiple shape

Question

I am working on a small program to draw multiple shape, I am having problem because I can not draw more than one shape on the screen at the same time . can you help me pls
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.applet.Applet;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.Rectangle2D;
import java.awt.Color;
public class BoxClickApplet extends Applet
int x1,y1;
int click=-1;
          class MyMouseListener implements MouseListener
          public void mousePressed(MouseEvent event){}
          public void mouseReleased(MouseEvent event){}
          public void mouseClicked(MouseEvent event)
               click++;
if (click==0)
                              x1=getWidth()/2-20;
                              y1=getHeight()-40;
                              repaint();
                              ((Graphics2D)g).fill(r);
               if (click==1)
                              x1=getWidth()/2-20;
                              y1=getHeight()/2-20;
                              repaint();
               if (click==2)
                              x1=getWidth()/2-20;
                              y1=0;
                              repaint();
if (click==3)
                         x1=getWidth()/2-20;
                         y1=getHeight()/2;
                         repaint();
                         x1=getWidth()/2-20;
                         click=-1;
public void mouseEntered(MouseEvent event){}
          public void mouseExited(MouseEvent event){}
MyMouseListener listener = new MyMouseListener();
addMouseListener(listener);
public void paint(Graphics g)
     g.setColor(Color.GREEN);
     Rectangle2D.Double r = new Rectangle2D.Double (x1,y1,40,40);
((Graphics2D)g).fill(r);

Answer 1

//  <applet code="BCA" width="400" height="400"></applet>
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
public class BCA extends Applet
    BufferedImage image;
    int width = 40;
    int height = 40;
    public void init()
        addMouseListener(new MyMouseListener());
    public void paint(Graphics g)
        if(image == null)
            initImage();
        g.drawImage(image, 0, 0, this);
    private void initImage()
        int w = getWidth();
        int h = getHeight();
        int type = BufferedImage.TYPE_INT_RGB;
        image = new BufferedImage(w, h, type);
        Graphics2D g2 = image.createGraphics();
        g2.setBackground(getBackground());
        g2.clearRect(0,0,w,h);
        g2.dispose();
    private void addRectangle(Point p)
        Graphics2D g2 = (Graphics2D)image.getGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setColor(Color.GREEN);
        g2.fill(new Rectangle(p.x-width/2, p.y-height/2, width, height));
        g2.dispose();
    private void clearImage()
        Graphics g = image.getGraphics();
        g.setColor(getBackground());
        g.fillRect(0, 0, image.getWidth(), image.getHeight());
        g.dispose();
    class MyMouseListener extends MouseAdapter
        public void mousePressed(MouseEvent event)
            if(event.getClickCount() == 2)
                clearImage();
            else
                addRectangle(event.getPoint());
            repaint();
}