Java Arraylist Unssuported Method Exception A Jdl2LZT4Y

Web Reference: The java.util.Arrays.ArrayList version is immutable and its remove() method is not overridden. As such, it defers to the AbstractList implementation of remove(), which throws an UnsupportedOperationException. In this quick tutorial, we’ll discuss a common Exception that can occur when working with some the API of most List implementations – the UnsupportedOperationException. A java.util.List has more functionality than an ordinary array can support. For instance, with only one built-in method call, it’s possible to check if a specific element is inside ... Jul 23, 2025 · ArrayList extends java.util.AbstractList and it does not implement add or remove method. Thus when this method is called on the list object, it calls to add or remove method of AbstractList class which throws this exception.

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