Naming Conventions For Programming Languages

Naming conventions make programs more understandable by making them easier to read. Following is a list of commonly used case styles.

Cases

Item	Convention	Example
Class	Start with an uppercase letter. Use nouns for eg. User, Thread, Controller, Service, etc.	`public class User`
Interface	Start with an uppercase letter. Use adjectives such as Runnable, Handler, Listener.	`interface Runnable`
Method	Start with a lowercase letter. Use a verb such as print(), login(), invoke() If the name contains multiple words, start with a lowercase letter followed by an uppercase letter such as calculateTax()	`void invoke() void calculateTax()`
Variable	Start with a lowercase letter such as id, or name. Do not use special characters. If the name contains multiple words, start it with the lowercase letter followed by an uppercase letter.	`int id; String fullName;`
Package	Lowercase letters such as java, lang. If the name contains multiple words, separate by dots (.)	`package dev.ctrlshift; package dev.ctlshift.user.interface;`
Constant	Uppercase letters. In case of multiple words, separate by an underscore(_) such as LOG_FILE_SIZE	`static final int LOG_FILE_SIZE = 18;`

Item	Convention	Example
Class	Start each word with a capital letter (CamelCase) Do not separate words with underscores.	`Model`, `MyClass`
Method	Use a lowercase word or words. Separate words with underscores to improve readability.	`class_method`, `method`
Variable	Use a lowercase single letter, word, or words. Separate words with underscores to improve readability.	`x`, `var`, `my_variable`
Package	Use a short, lowercase word or words. Do not separate words with underscores.	`package`, `mypackage`
Constant	Use an uppercase single letter, word, or words. Separate words with underscores to improve readability.	`MY_LONG_CONSTANT`
Module	Use a short, lowercase word or words. Separate words with underscores to improve readability.	`my_module.py`