Different Java programmers have their own style of writing code. While that may work while working alone, it may become difficult to understand and maintain such code in a team environment.

Following standard naming conventions helps make the code readable to yourself and your fellow programmers.
 
Here are some standard naming conventions that your may refer to :
 

Packages

Package names are written in all lowercase characters. The prefix of package name is always written in all-lowercase ASCII letters and should be one of the top-level domain names, like com, edu, gov, mil, net, org.

The subsequent portions follow organization’s own naming conventions.

com.topjavatutorial.jdbc
com.mysql.jdbc
 

Classes and Interfaces

Classes and Interfaces always start with a capital letter, and are CamelCase:

Employee
Exception
Integer
 

Variables and Methods

Variables and methods always start with a lowercase letter, and are camelCase too:

int someNumber= 10;
public void doSomething();
 

Constants

static final instance variables can never change, and are therefore constant. The convention for constants is to be all uppercase, with any breaks between words represented by an underscore:

public static final int HTTP_OK = 200;
private static final String SUCCESS_RESPONSE = “YES”;

Reference :

http://www.oracle.com/technetwork/java/codeconventions-135099.html

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