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Java ArrayList isEmpty() Method with Example

ArrayList Class isEmpty() method: Here, we are going to learn about the isEmpty() method of ArrayList Class with its syntax and example.
Submitted by Preeti Jain, on January 19, 2020

ArrayList Class isEmpty() method

• isEmpty() method is available in java.util package.
• isEmpty() method is used to check whether this Arraylist is "empty" or "not empty".
• isEmpty() method is a non-static method so it is accessible with the class object and if we try to access the method with the class name then we will get an error.
• isEmpty() method does not throw an exception at the time of checking the status of an empty Arraylist.

Syntax:

    public boolean isEmpty();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of this method is boolean, it returns true when this Arraylist is "empty" otherwise it returns false when this Arraylist is "non-empty".

Example:

// Java program to demonstrate the example 
// of boolean isEmpty() method of ArrayList

import java.util.*;

public class EmpytArrayList {
    public static void main(String[] args) {
        // Create an ArrayList with initial 
        // capacity of storing elements

        ArrayList arr_l = new ArrayList(10);

        // By using add() method is to add 
        // elements in this ArrayList
        arr_l.add("C");
        arr_l.add("C++");
        arr_l.add("JAVA");
        arr_l.add("DOTNET");
        arr_l.add("PHP");

        // Display ArrayList
        System.out.println("ArrayList Elements :" + arr_l);

        // By using isEmpty() method is to check
        // the empty ArrayList
        boolean status = arr_l.isEmpty();

        // Display status of the given ArrayList
        System.out.println("arr_l.isEmpty() : " + status);
    }
}

Output

ArrayList Elements :[C, C++, JAVA, DOTNET, PHP]
arr_l.isEmpty() : false