Country.java.html

  1  /**
  2     A country with a name and area.
  3  */
  4  public class Country
  5  {
  6     private String name;
  7     private double area;
  8  
  9     /**
 10        Constructs a country.
 11        @param aName the name of the country
 12        @param anArea the area of the country
 13     */
 14     public Country(String aName, double anArea) 
 15     { 
 16        name = aName;
 17        area = anArea; 
 18     }
 19  
 20     /**
 21        Gets the country name.
 22        @return the name
 23     */
 24     public String getName() 
 25     {
 26        return name;
 27     }
 28  
 29     /**
 30        Gets the area of the country.
 31        @return the area
 32     */
 33     public double getArea() 
 34     {
 35        return area;
 36     }
 37     
 38     public int hashCode()
 39     {
 40        int h1 = name.hashCode();
 41        int h2 = new Double(area).hashCode();
 42        final int HASH_MULTIPLIER = 29;
 43        int h = HASH_MULTIPLIER * h1 + h2;
 44        return h;
 45     }
 46  
 47     public boolean equals(Object otherObject)
 48     {  
 49        Country other = (Country) otherObject;
 50        return name.equals(other.name) 
 51           && area == other.area; 
 52     }
 53     
 54     public String toString()
 55     {
 56        return getClass().getName() + "[name=" + name 
 57           + ",area=" + area + "]";
 58     }
 59  }