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 Primitive Data Types A primitive data type specifies the type of a variable and the kind of values it can hold. There are eight primitive data types in Java: Imagine that you have a small box that can hold numbers. This box can hold numbers from -128 to 127. It's like a toy box that can only fit a certain range of toys, from -128 to 127. You can put any number from this range inside the box. The byte data type is an 8-bit signed integer that can hold values from -128 to 127. It is commonly used when mem...
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