The size or length count of an array in Java includes both null and non-null characters. Unlike the String and ArrayList, Java arrays do not have a size () or length () method, only a length property.

The Java array length property does not have round brackets after the field. The Java String length () method does. Confusion here will cause compile time errors, so be careful.

Thus, when my application caches many distinct String values, I can just keep the arrays in memory and convert them to String s as needed. That works well if each such String then serves as a ...

In Java an array is a way of storing multiple items of the same type. In this quick tutorial we introduce you to the very basics.