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Keywords are specific terms that serve as a code's key. Because they are Java's predefined terms, they can't be used as identifiers. In Java, identifiers are symbolic names that are used to identify objects. They can be anything from a class name to a variable name to a method name to a package name to a constant name.

A data type limits the possible values for an expression, such as a variable or a function. This data type specifies the actions that can be performed on the data, as well as the data's meaning and storage options.

The different sizes and values that can be stored in the variable are defined by data types. In Java, there are two types of data types: Types of primitive data: Boolean, char, byte, short, int, long, float, and double are examples of primitive data types.

Because Java is a heavily typed language, data types are very significant. This means that the compiler checks all operations for type compatibility. Illegal activities will not be recorded. As a result, strong type checking aids in the prevention of errors and improves reliability.

The primary distinction between static and final is that static is used to establish a class member that can be utilised independently of any of the class's objects. Final, on the other hand, is used to declare a constant variable, an overridable method, or a class that cannot be inherited.

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