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About Ilias Tsagklis

Ilias Tsagklis
Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.

ArrayList size example

In this example we shall show you how to get the ArrayList size, that is the number of elements that the ArrayList contains. To get the ArrayList size one should perform the following steps:

  • Create a new ArrayList.
  • Populate the arrayList with elements, using add(E e) API method of ArrayList.
  • Use the size() API method of ArrayList. The method returns the int number of elements that the arrayList contains,

as described in the code snippet below.
 

package com.javacodegeeks.snippets.core;

import java.util.ArrayList;
 
public class GetSizeOfArrayList {
 
  public static void main(String[] args) {

    // Create an ArrayList and populate it with elements
    ArrayList arrayList = new ArrayList();
    arrayList.add("element_1");
    arrayList.add("element_2");
    arrayList.add("element_3");
 
    int elementsCount = arrayList.size();
 
    System.out.println("Elements in Array :");
    for(int i=0; i < elementsCount; i++)

System.out.println(arrayList.get(i));
 
  }
}

Output:

Elements in Array :
element_1
element_2
element_3

 
This was an example of how to get the ArrayList size in Java.

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