Web Reference: Oct 3, 2025 · In Java, variables are containers that store data values, such as numbers, text, or Boolean values. Java variables are categorized into different types based on their scope, lifetime, and usage, helping programmers manage data efficiently and write organized, maintainable code. 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: Each variable in Java has a specific type, which determines the size and layout of the variable's memory; the range of values that can be stored within that memory; and the set of operations that can be applied to the variable.
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