Cercle.java

package com.company;

import java.awt.*;
import static java.lang.Math.*;

/**
 * Created by Ilyes Hammadi on 22/04/2015.
 */
public class Cercle {
    Point centre;
    float rayon;

    // constructor
    public Cercle() {
        this.centre.setLocation(0, 0);
        this.rayon = 0;
    }
    public Cercle(Point centre, float rayon) {
        this.centre = centre;
        this.rayon = rayon;
    }
    public Cercle(Cercle cercle){
        this.centre = cercle.centre;
        this.rayon = cercle.rayon;
    }

    // setters
    public void setCentre(Point centre) {
        this.centre = centre;
    }
    public void setRayon(float rayon) {
        this.rayon = rayon;
    }

    // getters
    public Point getCentre() {
        return centre;
    }
    public float getRayon() {
        return rayon;
    }

    // methods
    public boolean isColision(Cercle cercle) {
        return pow(this.centre.getX() - cercle.centre.getX(), 2) + pow(this.centre.getY() - cercle.centre.getY(), 2) < pow(this.rayon + cercle.rayon, 2);
    }

    // static methods
    public static boolean isColision(Cercle c1, Cercle c2) {
        return pow(c1.centre.getX() - c2.centre.getX(), 2) + pow(c1.centre.getY() - c2.centre.getY(), 2) < pow(c1.rayon + c2.rayon, 2);
    }
}