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TIOBE - Java Coding Standard

Rule:  Naming4Checked automatically with code checker

Synopsis:Use naming conventions for variables
Severity Level:4

A variable naming conventions rule - customize this to your liking. Currently, it checks for static final variables and final interface variables that should be fully capitalized and non-final variables should start with a small letter.
public class Foo {
 public static final int MY_NUM = 0;
 public String myTest = "";
 DataModule dmTest = new DataModule();

Literature References:
Google Android Guidelines