Web Reference: Dec 10, 2024 · In Java, the ArrayList contains () method is used to check if the specified element exists in an ArrayList or not. Example: Here, we will use the contains () method to check if the ArrayList of Strings contains a specific element. ArrayList.contains() might have to iterate the whole list to find the instance you are looking for. We can use contains method to check if an item exists. But we can use this only if we have provided the implementation of equals and hashCode else object reference will be used for equality comparison. The contains() method returns true if an item exists in a list and false otherwise. Required. The item being tested. true if the object exists in the list, false otherwise. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
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