Data Types in Java Every variable in java has a data type. Data types specify the size and type of values that can be stored in an identifier. Java language is rich in its data types. The variety of ...

A repository for understanding Java data structures. Covers primitive data types (e.g., int, float, double, char) and high-level data structures like arrays, linked lists, stacks, queues, and maps, ...

In contrast, a data structure is a concrete implementation of one or more ADTs, similar to how Java classes implement interfaces. Examples of ADTs include Employee, Vehicle, Array, and List.

Even the most complicated classes in Java can be flattened down to nothing more than the set of primitive data types they represent. But primitive types aren’t objects, and that presents a problem.