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  1. /*correct output*/
  2. import static java.lang.StrictMath.acos;
  3.  
  4. class nsu3 {
  5.     static double PI = acos(-1);
  6.  
  7.     interface Comparable{
  8.         int compareTo(Shape3D o);
  9.     }
  10.     abstract class Shape3D implements Comparable{
  11.         public Shape3D(Boolean filled) {
  12.             this.filled = filled;
  13.         }
  14.         Boolean filled;
  15.         Boolean isFilled(){
  16.             return  filled;
  17.         }
  18.         public int compareTo(Shape3D o){
  19.             // returns -1 if this<o, 0 if equal, 1 if this>o
  20.             double x = this.getVolume(), y = o.getVolume();
  21.             if(x<y) return -1;
  22.             if(x==y) return 0;
  23.             return 1;
  24.         }
  25.         abstract double getArea();
  26.         abstract double getVolume();
  27.     }
  28.  
  29.     class Sphere extends Shape3D {
  30.         public Sphere(double radius, Boolean filled) {
  31.             super(filled);
  32.             this.radius = radius;
  33.         }
  34.         double radius;
  35.         public double getArea() {
  36.             return 4*PI*radius*radius;
  37.         }
  38.         public double getVolume() {
  39.             return 4*PI*radius*radius*radius/3.0;
  40.         }
  41.         @Override
  42.         public String toString() {
  43.             return "Sphere{" +
  44.                     "filled=" + filled +
  45.                     ", radius=" + radius +
  46.                     '}';
  47.         }
  48.     }
  49.     class Cube extends Shape3D {
  50.         public Cube(double side, Boolean filled) {
  51.             super(filled);
  52.             this.side = side;
  53.         }
  54.         double side;
  55.         public double getArea() {
  56.             return 6*side*side;
  57.         }
  58.         public double getVolume() {
  59.             return side*side*side;
  60.         }
  61.         @Override
  62.         public String toString() {
  63.             return "Cube{" +
  64.                     "filled=" + filled +
  65.                     ", side=" + side +
  66.                     '}';
  67.         }
  68.     }
  69.  
  70.     public static void main(String[] args) {
  71.         nsu3 nn = new nsu3();
  72.         nn.solve();
  73.     }
  74.     public void solve(){
  75.         Sphere sp = new Sphere(1, true);
  76.         Sphere sp2 = new Sphere(234, true);
  77.  
  78.         System.out.println(sp.getArea());
  79.         System.out.println(sp2.getVolume());
  80.         System.out.println(sp.compareTo(sp2));
  81.  
  82.         Cube cb = new Cube(234234, false);
  83.  
  84.         System.out.println(cb.getVolume());
  85.         System.out.println(cb.compareTo(sp));
  86.         System.out.println(cb.toString());
  87.     }
  88. }
  89.  
Success #stdin #stdout 0.13s 37492KB
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stdin
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stdout
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12.566370614359172
5.367056677006837E7
-1
1.2851381163524904E16
1
Cube{filled=false, side=234234.0}
https://ideone.com/JcmaVG
language:
Java (HotSpot 12)
created:
3 years ago
visibility:
public

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