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Get the size of an ArrayList in Java

Java 8Object Oriented ProgrammingProgramming

The size of an ArrayList can be obtained by using the java.util.ArrayList.size() method as it returns the number of elements in the ArrayList i.e. the size.

A program that demonstrates this is given as follows −

Example

 Live Demo

import java.util.ArrayList;
import java.util.List;
public class Demo {
   public static void main(String[] args) {
      List aList = new ArrayList();
      aList.add("Apple");
      aList.add("Mango");
      aList.add("Guava");
      aList.add("Orange");
      aList.add("Peach");
      System.out.println("The size of the ArrayList is: " + aList.size());
   }
}

Output

The size of the ArrayList is: 5

Now let us understand the above program.

The ArrayList aList is created. Then ArrayList.add() is used to add the elements to the ArrayList. ArrayList.size() returns the size of the ArrayList and that is displayed. A code snippet which demonstrates this is as follows −

List aList = new ArrayList();
aList.add("Apple");
aList.add("Mango");
aList.add("Guava");
aList.add("Orange");
aList.add("Peach");
System.out.println("The size of the ArrayList is: " + aList.size());
raja
karthikeya Boyini
Updated on 30-Jul-2019 22:30:24

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