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Get Size of Java ArrayList and loop through elements Example

  1. /*
  2.   Get Size of Java ArrayList and loop through elements Example
  3.   This Java Example shows how to get size or number of elements currently
  4.   stored in ArrayList. It also shows how to loop through element of it.
  5. */
  6.  
  7. import java.util.ArrayList;
  8.  
  9. public class GetSizeOfArrayListExample {
  10.  
  11.   public static void main(String[] args) {
  12.     //create an ArrayList object
  13.     ArrayList arrayList = new ArrayList();
  14.    
  15.     //Add elements to Arraylist using
  16.     arrayList.add("1");
  17.     arrayList.add("2");
  18.     arrayList.add("3");
  19.  
  20.     //To get size of Java ArrayList use int size() method
  21.     int totalElements = arrayList.size();
  22.    
  23.     System.out.println("ArrayList contains...");
  24.     //loop through it
  25.     for(int index=0; index < totalElements; index++)
  26.       System.out.println(arrayList.get(index));
  27.    
  28.   }
  29. }
  30.  
  31. /*
  32. Output would be
  33. ArrayList contains...
  34. 1
  35. 2
  36. 3
  37. */