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Find Minimum element of Java HashSet Example

  1. /*
  2.   Find Minimum element of Java HashSet Example
  3.   This java example shows how to find a minimum element of Java HashSet using
  4.   min method of Collections class.
  5. */
  6.  
  7. import java.util.HashSet;
  8. import java.util.Collections;
  9.  
  10. public class FindMinimumOfHashSetExample {
  11.  
  12.   public static void main(String[] args) {
  13.    
  14.     //create a HashSet object
  15.     HashSet hashSet = new HashSet();
  16.    
  17.     //Add elements to HashSet
  18.     hashSet.add(new Long("923740927"));
  19.     hashSet.add(new Long("4298748382"));
  20.     hashSet.add(new Long("2374324832"));
  21.     hashSet.add(new Long("2473483643"));
  22.     hashSet.add(new Long("32987432984"));
  23.    
  24.     /*
  25.        To find minimum element of Java HashSet use,
  26.        static Object min(Collection c) method of Collections class.
  27.      
  28.        This method returns the minimum element of Java HashSet according to
  29.        its natural ordering.
  30.     */
  31.    
  32.     Object obj = Collections.min(hashSet);
  33.    
  34.     System.out.println("Minimum Element of Java HashSet is : " + obj);
  35.   }
  36. }
  37. /*
  38. Output would be
  39. Minimum Element of Java HashSet is : 923740927
  40. */