Explosion.java

import java.awt.*;

public class Explosion {

    // Fields 
    private double x;
    private double y ;
    private int r;
    private  int maxRadius;

   // Constructor '
  public Explosion (double x , double y ,int r, int max ){
        this.x = x ;
        this.y = y;
        this.r = r;
        maxRadius = max;
    }
    
    public boolean update () {
        r += 2;
        if (r >= maxRadius) {
            return true;
        }
        return false;
    }
      
    public void draw (Graphics2D g ){
        g.setColor (new Color ( 255, 255,255, 128) );
        g.setStroke(new BasicStroke(3));                                                     
        g.drawOval ((int) ( x - r) , (int) (y - r) , 2 * r ,2 * r);
        g.setStroke(new BasicStroke(1)); 
        }                                                    
}