File Metrics for Java

This document outlines the definition of file metrics for Java.

complexity

The "complexity" metric counts:

if and else if statements
ternary operators
for loops with following syntaxes:
- for (<initialization>; <termination>; <increment>) {...}
- for (<element> : <iterable>) {...}
while and do...while loops
case labels in switch-statements
catch blocks
logical binary operations && and ||
everything counted for the "functions" metric

It does not count:

.forEach(...) method call for iterables and other of built-in function calls

functions

The "functions" metric counts:

method declarations and definitions in classes, abstract classes and interfaces
static methods and constructors
lambda expressions
initialization block (static and non-static)

classes

The "classes" metric counts:

definitions of class, abstract class, interface, enum and record
anonymous classes

lines_of_code, comment_lines, real_lines_of_code and keywords_in_comments