Tokens in Java

Smallest Elements of a Java Program

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Java tokens are the smallest elements of a program that are meaningful to the compiler.

5 types of Tokens

• Reserved Keywords
• Identifiers
• Literals
• Operators
• Separators

Reserved Keywords

Java reserved words are keywords that are reserved by Java functions or other uses that cannot be used as identifiers

• Have standard, pre-defined meanings in Java.
• Cannot be used as programmer-defined identifiers.
• Reserved words use only lowercase letters.

This Include

Primitive data types: boolean, int, double, char, etc.

Storage modifiers: public, private, static, final, etc.

Control statements: if, else, switch, while, for, etc.

Built-in constants: true, false, null

Identifiers

An identifier is a string of alphanumeric characters that begins with an alphabetic character or an underscore character that is used to represent variables…