public class Particle{
        int x;
        int y;
        int xv;
        int yv;
        int angle;
        int velocity = (int)(Math.random()*5);
        int energy;
        boolean dead = false;
        public void update(){
                xv = (int)(velocity * (Math.sin(angle)));
                yv = (int)(velocity * (Math.cos(angle)));
                x += xv;
                y += yv;
                energy -= 10;
                if(energy <= 0)
                        dead = true;

        }
        public void draw(Graphics2D g){
                Ellipse2D particle = new Ellipse2D.Float(x,y,5,5);
                g.setColor(Color.black);
                g.fill(particle);
        }
}
public class ParticleSystem{
        Particle[] particle = new Particle[1500];//Particle array
        int x;//X coordinate of particle origin
        int y;//Y coordinate of particle origin

        ParticleSystem(int mousePx, int mousePy){
                x = mousePx;
                y = mousePy;
        }
        public void init(){
                for(int i = 0; i <= particle.length - 1; i++){
                        particle[i] = new Particle();
                        particle[i].x = x;
                        particle[i].y = y;
                        particle[i].energy = 255;
                        particle[i].angle = (int)(Math.toRadians(Math.random()*i));
                }
        }
        public void update(){
                for(int i = 0; i <= particle.length - 1; i++){
                        particle[i].update();
                }
        }
        public void draw(Graphics2D g){
                for (int i = 0; i <= particle.length - 1; i++){
                particle[i].draw(g);
                }
        }
}