Collection isEmpty() method in Java with Examples

The isEmpty() of java.util.Collection interface is used to check if the Collection upon which it is called is empty or not. This method does return a boolean value indicating whether the collection is empty or not. Here's the correct information for the isEmpty() method:

Syntax:

boolean isEmpty()

Parameters:

This method does not accept any parameter.

Return Value:

This method returns a boolean value, which indicates whether the collection is empty or not. The below examples illustrate the Collection isEmpty() method:

Example 1: Using LinkedList Class

The list is: [Geeks, for, Geeks]
Is the LinkedList empty: false
The new List is: []
Is the LinkedList empty: true

Example 2: Using ArrayDeque Class

ArrayDeque: [Welcome, To, Geeks, 4, Geeks]
Is the ArrayDeque empty: false
The new ArrayDeque is: []
Is the ArrayDeque empty: true

Example 3: Using ArrayList Class

ArrayList: [15, 20, 25]
Is the ArrayList empty: false
The new ArrayList is: []
Is the ArrayList empty: true

Reference: