Java.util.ArrayList.size() Method

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Description

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

Declaration

Following is the declaration for java.util.ArrayList.size() method

public int size()

Parameters

  • NA

Return Value

This method returns the number of elements in this list.

Exception

  • NA

Example

The following example shows the usage of java.util.Arraylist.size() method.

package com.tutorialspoint;

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {
      
      // create an empty arraylist with an initial capacity
      ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

      // use add() method to add elements in the list
      arrlist.add(15);
      arrlist.add(20);
      arrlist.add(25);
      arrlist.add(22);

      // let us print all the elements available in list
      for (Integer number : arrlist) {
        System.out.println("Number = " + number);
      }

      // this will print the size of this list
      int retval = arrlist.size();
      System.out.println("Size of list = " + retval); 
   }
}

Let us compile and run the above program, this will produce the following result:

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



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