Token in JAVA

A token is the smallest unit in a program. These tokens are like the building blocks of your code. 

Here are the main types of tokens in Java:

Keywords: Keywords are reserved words with special meanings in Java. Examples include if, while, class, and public. You cannot use keywords for anything other than their intended purpose in the language.

Identifiers: Identifiers are names you choose for your variables, classes, methods, and other elements. They must start with a letter, underscore (_), or dollar sign ($), followed by letters, digits, underscores, or dollar signs.

Literals: Literals are constant values that appear directly in your code. Examples are 5 (an integer literal), 3.14 (a floating-point literal), and "Hello" (a string literal).

Operators: Operators are symbols that perform operations on variables and values. Examples include + (addition), - (subtraction), * (multiplication), and = (assignment).

Punctuation: Punctuation symbols help structure your code. Examples are { (opening curly brace), } (closing curly brace), ; (semicolon), and , (comma).

Comments: Comments are not part of the code's functionality but are used for explanations and notes. They start with // for single-line comments or /* and end with */ for multi-line comments.

Whitespace: Whitespace tokens, like spaces and line breaks, separate other tokens but are generally ignored by the compiler.

// This is a single-line comment

public class TokenExample { public static void main(String[] args) { int number = 42; // Declaration and assignment System.out.println("The number is " + number); // Output statement } }

In this code, you can identify various tokens:

Keywords: public, class, static, void, main

Identifiers: TokenExample, main, args, number

Literals: 42

Operators: =, +

Punctuation: {, }, ;, (), "

Comments: // This is a single-line comment

Whitespace: Spaces and line breaks