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Find maxmimum element of Java ArrayList Example

  1. /*
  2.   Find maxmimum element of Java ArrayList Example
  3.   This java example shows how to find a maximum element of Java ArrayList using
  4.   max method of Collections class.
  5. */
  6.  
  7. import java.util.ArrayList;
  8. import java.util.Collections;
  9.  
  10. public class FindMaximumOfArrayListExample {
  11.  
  12.   public static void main(String[] args) {
  13.    
  14.     //create an ArrayList object
  15.     ArrayList arrayList = new ArrayList();
  16.    
  17.     //Add elements to Arraylist
  18.     arrayList.add(new Integer("327482"));
  19.     arrayList.add(new Integer("13408"));
  20.     arrayList.add(new Integer("802348"));
  21.     arrayList.add(new Integer("345308"));
  22.     arrayList.add(new Integer("509324"));
  23.    
  24.     /*
  25.        To find maximum element of Java ArrayList use,
  26.        static Object max(Collection c) method of Collections class.
  27.      
  28.        This method returns the maximum element of Java ArrayList according to
  29.        its natural ordering.
  30.     */
  31.    
  32.     Object obj = Collections.max(arrayList);
  33.    
  34.     System.out.println("Maximum Element of Java ArrayList is : " + obj);
  35.   }
  36. }
  37.  
  38. /*
  39. Output would be
  40. Maximum Element of Java ArrayList is : 802348
  41. */