Web Reference: Jan 16, 2026 · Data types in Java define the kind of data a variable can hold and the memory required to store it. They are broadly divided into two categories: Primitive Data Types: Store simple values directly in memory. Non-Primitive (Reference) Data Types: Store memory references to objects. Data Types in Java Primitive Data Types Data types are divided into two groups: Primitive data types - includes byte, short, int, long, float, double, boolean and char Non-primitive data types - such as String, Arrays and Classes (you will learn more about these in a later chapter) Primitive data types are predefined by the language and named by a keyword. There are eight primitive data types supported by Java. Below is the list of the primitive data types: 1. byte 2. short 3. int 4. long 5. float 6. double 7. boolean
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