What does the method size() do in java?

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The size() method of the class java.util.ArrayList returns the number of elements in this list i.e. the size of the list.

Example

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {
      ArrayList<Integer> arrlist = new ArrayList<Integer>(5);
      arrlist.add(15);
      arrlist.add(20);
      arrlist.add(25);
      arrlist.add(22);
      for (Integer number : arrlist) {
         System.out.println("Number = " + number);
      }
      int retval = arrlist.size();
      System.out.println("Size of list = " + retval);
   }
}

Output

Number = 15
Number = 20
Number = 25
Number = 22
Size of list = 4

Abhinanda Shri

Updated on 20-Feb-2020 12:16:41

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