What is the maximum number of elements that can be placed in an ArrayList, assuming no memory restrictions?

The maximum number of elements in an ArrayList in Java is limited by the maximum size of the array it uses internally. Theoretically, this is about Integer.MAX_VALUE (2,147,483,647) elements, since array indices are of type int. In practice, due to overhead and JVM memory constraints, this limit will be lower.

Thus, in the absence of memory restrictions, the maximum size of an ArrayList is just under 2,147,483,647 elements.