Load: AcidRainApplet.class can't be instantiated

Question

The error "load: AcidRainApplet.class can't be instantiated" is coming up on this bit of code, any ideas on being rid of it?
// The "AcidRainApplet" class.
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.util.Date;
import javax.swing.*;
public class AcidRainApplet extends Applet implements KeyListener, ActionListener
  public AcidRainApplet ()
    super ();
  int width = 600, height = 450;
  int x = width / 2, y = height - 100, w = 27, h = 40;
  int count = 0;
  boolean playing = true, pause = true;
  Font endFont = new Font ("Arial Black", Font.PLAIN, 36);
  Font ptFont = new Font ("Westminster", Font.PLAIN, 28);
  int points = 0;
  int numRain = 80;
  int maxRain = 200;
  int speed = 5;
  ImageIcon imgi = new ImageIcon ("homer.gif");
  Image ch = imgi.getImage ();
  javax.swing.Timer t;
  public void init ()
    setBackground (Color.black);
    t = new javax.swing.Timer (speed, this);
    this.addKeyListener (this);
    for (int i = 0 ; i < maxRain ; i++)
      rain = new Rain ();
} // init method
public void paint (Graphics g)
super.paint (g);
g.setColor (Color.white);
g.drawString ("" + numRain, width - 20, 15);
if (playing)
g.drawImage (ch, x, y, null);
g.setColor (Color.green);
for (int i = 0 ; i < numRain ; i++)
g.drawLine (rain [i].x, rain [i].y, rain [i].x, rain [i].y - 10);
if (!(pause))
rain [i].y += rain [i].sp;
if (rain [i].y > height)
rain [i].x = (int) (Math.random () * width);
rain [i].y = 0;
rain [i].sp = (int) (Math.random () * 5) + 2;
points++;
else if (rain [i].x >= x && rain [i].x <= x + w && rain [i].y >= y && rain [i].y <= y + h)
playing = false;
else
g.drawString ("PRESS ENTER TO PLAY AGAIN", 180, 400);
g.setFont (endFont);
g.setColor (Color.red);
g.drawString ("GAME OVER", 150, 200);
g.setFont (ptFont);
g.setColor (Color.green);
g.drawString ("Score: " + points, 200, 300);
t.stop ();
if (pause)
g.setColor (Color.green);
g.drawString ("PRESS ENTER", 200, 200);
} // paint method
public void resetVars ()
x = width / 2;
y = height - 100;
count = 0;
playing = true;
pause = true;
points = 0;
maxRain = 200;
speed = 5;
for (int i = 0 ; i < maxRain ; i++)
rain [i] = new Rain ();
public class Rain extends Applet
Rain ()
int x = (int) (Math.random () * width);
int y = 0;
int sp = (int) (Math.random () * 5) + 2;
Rain rain [] = new Rain [maxRain];
public void actionPerformed (ActionEvent e)
repaint ();
public void keyTyped (KeyEvent k)
public void keyPressed (KeyEvent k)
int key = k.getKeyCode ();
if (!(pause))
if (key == k.VK_LEFT && x > 0)
x -= 5;
if (key == k.VK_RIGHT && x + w < width)
x += 5;
if (key == k.VK_DOWN && numRain > 10)
numRain -= 10;
repaint ();
if (key == k.VK_UP && numRain != maxRain)
numRain += 10;
repaint ();
if (key == k.VK_ENTER)
if (pause)
pause = false;
t.start ();
else if (!(playing))
resetVars ();
else
pause = true;
t.stop ();
public void keyReleased (KeyEvent k)
} // AcidRainApplet class

Answer 1

Irrespective of the working of your program, I would suggest you remove a lot of weeds and clean the code. That would help you do easier debugging .
Somethings I can quickly tell are,
the constructor in AcidRainApplet not useful, Rain implementing Applet not useful, implements KeyListener, ActionListener can be delegated to another class, usage of inner class can be rethinked of delegation can be given a thought. Following code can be thought of :
  class Rain
    private  int x = 0;
    private int y = 0;
    private int sp = 0;
    Rain ()
      reset();
    public int getX() {
      return x;
    public int getY() {
      return y;
    public void setX(int x) {
      this.x = x;
    public void setY(int y) {
      this.y = y;
     public void reset() {
      x = (int) (Math.random () * width);
      y = 0;
      sp = (int) (Math.random () * 5) + 2;   
  }Good wishes,
Rajesh