non-static method cannot be referenced from a static context

Hi im a newbie at this ^^;

I get the error message "non-static method cannot be referenced from a static context" when i try to compile my Asteroids class. Im trying to access an arraylist from my spaceRock class.

package Asteroids;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import javax.swing.JFrame;

import javax.swing.Timer;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.awt.event.KeyListener;

import java.awt.event.KeyEvent;

importstatic java.lang.Character.*;

import java.awt.image.BufferedImage;

importstatic java.lang.System.*;

import Asteroids.Ship;

publicclass Asteroidsextends JFrameimplements KeyListener

{

private Timer timer;

privatefinalstaticint SLEEP = 50;

privateint xHelm = 300;

privateint yHelm = 100;

private Ship Enterprise =new Ship();

private spaceRock Rock =new spaceRock();

private spaceRock s =new spaceRock();

public Asteroids()

{

super("Asteroids :D");

setSize( 650, 550 );

setBackground(Color.black);

this.addKeyListener(this);

ActionListener paintCaller =new ActionListener(){

publicvoid actionPerformed(ActionEvent event)

{

repaint();

xHelm--;

yHelm++;

}

};

timer =new Timer(SLEEP, paintCaller);

timer.start();

setVisible(true);

}

publicvoid paint( Graphics window )

{

Graphics2D twoDGraph = (Graphics2D)window;

int width = this.getWidth();

int height = this.getHeight();

BufferedImage back = (BufferedImage)(this.createImage(width,height));

Graphics graphToBack = back.createGraphics();

Enterprise.launchShip(graphToBack,xHelm,yHelm);

for(int i = 0; i<spaceRock.spawns.size(); i++)//Gives me errors

{

spaceRock r = spaceRock.spawns.get(i);//Gives me errors

r.releaseAsteroid(graphToBack,yHelm+50,xHelm+50);

}

twoDGraph.drawImage(back, null, 0, 0);

}

publicvoid keyTyped(KeyEvent e)

{

if (e.getKeyChar() =='b' || e.getKeyChar() =='B')

{

Enterprise.damageShields();

}

}

publicvoid keyPressed(KeyEvent e)

{

}

publicvoid keyReleased(KeyEvent e)

{

}

publicstaticvoid main( String args[] )

{

Asteroids Game =new Asteroids();

}

}

// spaceRock Class

package Asteroids;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Toolkit;

import java.awt.Image;

import javax.swing.JFrame;

import java.util.ArrayList;

publicclass spaceRockextends JFrame

{

privateint width;

privateint height;

private Image asteroid;

ArrayList><spaceRock> spawns =new ArrayList<spaceRock>();

public spaceRock()

{

width=50;

height=50;

asteroid=null;

}

publicvoid releaseAsteroid(Graphics window,int x,int y)

{

asteroid = Toolkit.getDefaultToolkit().getImage("astero6b.png");

window.drawImage(asteroid,x,y,width,height,this);

}

}

I comment-flagged the lines that give me errors.

Thankyou for your time ^_^

[7155 byte] By [Ultimate_Sonica] at [2007-11-27 2:54:21]