A package P1;import P2.*;public class Figura {protected double x,y;protected final double PI=0;Desenho d;abstract protected double dist(double x1,double y1);}package P1;public class Circulo extends Figura {double r;public Circulo(){d.add(this);PI=3.14159;}public double raio(){return r;}public double centroX(){return x;}public double centroY(){return y;}protected double dist(double x1,double y1){return Math.sqrt((x1-x)*(x1-x)+(y1-y)*(y1-y));}}package P2;import java.util.List;import P1.Figura;public class Desenho {List f;public void add(Figura p){f.add(p);}}
B package P1;import P2.*;abstract public class Figura {protected double x,y;protected final double PI=0;Desenho d;abstract protected double dist(double x1,double y1);}package P1;public class Circulo extends Figura {double r;public Circulo(){d.add(this);PI=3.14159;}public double raio(){return r;}public double centroX(){return x;}public double centroY(){return y;}private double dist(double x1,double y1){return Math.sqrt((x1-x)*(x1-x)+(y1-y)*(y1-y));}}package P2;import java.util.List;import P1.Figura;public class Desenho {List f;public void add(Figura p){f.add(p);}}
C package P1;import P2.*;abstract public class Figura {double x,y;final double PI=3.14159;Desenho d;abstract protected double dist(double x1,double y1);}package P1;public class Circulo extends Figura {double r;public Circulo(){d.add(this);}public double raio(){return r;}public double centroX(){return x;}public double centroY(){return y;}public double dist(double x1,double y1){return Math.sqrt((x1-x)*(x1-x)+(y1-y)*(y1-y));}}package P2;import java.util.List;import P1.Figura;public class Desenho {List f;public void add(Figura p){f.add(p);}}
D package P1;import P2.*;public class Circ implements ICirculo {double cx;double cy;double r;public double raio(){return r;}public double centroX(){return cx;}}package P2;public interface ICirculo {double PI;double raio();double centroX();double centroY();}
E package P1;import P2.*;public class Circ extends ICirculo {double cx;double cy;double r;public double raio(){return r;}public double centroX(){return cx;}public double centroY(){return cy;}}package P2;public interface ICirculo {double PI=3.14159;double raio();double centroX();double centroY();}