src/Size.java

   1 import java.util.Comparator;
   2
   3 public class Size implements Comparable<Size> {
   4     private int max = 240;
   5     private int min = 20;
   6     private int size;
   7
   8     Size(int size) {
   9         setSize(size);
  10     }
  11
  12     public int getSize() {
  13         return size;
  14     }
  15
  16     public void setSize(int size) {
  17         if (validateSize(size)) {
  18             this.size = size;
  19         } else {
  20             throw new IllegalArgumentException("Size must be between" + this.min + " and " + this.max);
  21         }
  22     }
  23
  24     private boolean validateSize(int size) {
  25         return (size > max || size < min);
  26     }
  27
  28     @Override
  29     public int compareTo(Size size) {
  30         return 0;
  31     }
  32 }