Web Reference: Learn about constants in Java with examples. Understand why constants are used, how to declare them, the different types, best practices, and more. An integer constant is a sequence of digits without a decimal point. For example, 10 and -200 are integer constants. There are three types of integer constants. They are as follows: 1. Decimal integer 2. Octal integer 3. Hexadecimal integer Jan 16, 2026 · To declare a constant in Java, you use the final keyword before the data type. Constants are typically named in all uppercase letters to distinguish them from variables.
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