JavaNCSS Metric Results

[ package ] [ object ] [ method ] [ explanation ]

The following document contains the results of a JavaNCSS metric analysis.
JavaNCSS web site.

Packages

[ package ] [ object ] [ method ] [ explanation ]

Packages sorted by NCSS.

PackageClassesMethodsNCSSJavadocsJavadoc linesSingle lines commentMulti lines comment
modules114362151201433
modules.bsx63219700157
Classes totalMethods totalNCSS totalJavadocsJavadoc linesSingle lines commentMulti lines comment
746559151201590

Objects

[ package ] [ object ] [ method ] [ explanation ]

TOP 30 classes containing the most NCSS.

ObjectNCSSMethodsClassesJavadocs
modules.BSXModule35214015
modules.bsx.BSXDisplay1141700
modules.bsx.BSXInputStream29400
modules.bsx.BSXPolygon15500
modules.bsx.BSXGraphic7300
modules.bsx.BSXScene7200
modules.bsx.BSXObject6100

TOP 30 classes containing the most methods.

ObjectNCSSMethodsClassesJavadocs
modules.bsx.BSXDisplay1141700
modules.BSXModule35214015
modules.bsx.BSXPolygon15500
modules.bsx.BSXInputStream29400
modules.bsx.BSXGraphic7300
modules.bsx.BSXScene7200
modules.bsx.BSXObject6100

Averages.

NCSS averageProgram NCSSClasses averageMethods averageJavadocs average
75.71559.000.006.572.14

Methods

[ package ] [ object ] [ method ] [ explanation ]

TOP 30 Methods containing the most NCSS.

MethodsNCSSCCNJavadocs
modules.BSXModule.decodeCommand(String)157621
modules.BSXModule.readBSXData(String)43251
modules.BSXModule.parseString(String)27121
modules.BSXModule.handleEvent(Event)25101
modules.bsx.BSXDisplay.redraw()22110
modules.BSXModule.resetMachine()1821
modules.BSXModule.asciiHexToInt(String)1881
modules.bsx.BSXDisplay.BSXDisplay(String)1320
modules.BSXModule.readIdentifier(String)1361
modules.bsx.BSXDisplay.drawPicture(BSXGraphic,int,int)1250
modules.bsx.BSXDisplay.showObject(String,int,int)1140
modules.bsx.BSXInputStream.readBSXPolygon()1120
modules.bsx.BSXDisplay.addScene(String,BSXGraphic)930
modules.bsx.BSXInputStream.readASCIIHex()950
modules.BSXModule.receive(String)931
modules.BSXModule.addNotify()921
modules.bsx.BSXDisplay.removeObject(String)830
modules.bsx.BSXDisplay.showScene(String)730
modules.BSXModule.main(String[])711
modules.bsx.BSXInputStream.readBSXGraphic()620
modules.bsx.BSXDisplay.addObject(String,BSXGraphic)530
modules.bsx.BSXDisplay.setScale(int)310
modules.bsx.BSXDisplay.mouseEnter(Event,int,int)310
modules.bsx.BSXObject.BSXObject(int,int)310
modules.bsx.BSXPolygon.BSXPolygon(int)310
modules.bsx.BSXPolygon.BSXPolygon(int[],int[],int,int)310
modules.bsx.BSXDisplay.BSXDisplay()210
modules.bsx.BSXDisplay.showScene()210
modules.bsx.BSXDisplay.showObject(String)210
modules.bsx.BSXDisplay.Translate(int,int,int,int,int)210

Averages.

Program NCSSNCSS averageCCN averageJavadocs average
559.0010.704.330.30

Explanations

[ package ] [ object ] [ method ] [ explanation ]

Non Commenting Source Statements (NCSS)

Statements for JavaNCSS are not statements as specified in the Java Language Specification but include all kinds of declarations too. Roughly spoken, NCSS is approximately equivalent to counting ';' and '{' characters in Java source files.

Not counted are empty statements, empty blocks or semicolons after closing brackets. Of course, comments don't get counted too. Closing brackets also never get counted, the same applies to blocks in general.

Examples
Package declarationpackage java.lang;
Import declarationimport java.awt.*;
Class declaration
  • public class Foo {
  • public class Foo extends Bla {
Interface declarationpublic interface Able ; {
Field declaration
  • int a;
  • int a, b, c = 5, d = 6;
Method declaration
  • public void cry();
  • public void gib() throws DeadException {
Constructor declarationpublic Foo() {
Constructor invocation
  • this();
  • super();
Statement declaration
  • i = 0;
  • if (ok)
  • if (exit) {
  • if (3 == 4);
  • if (4 == 4) { ;
  • } else {
Label declarationfine :
In some cases consecutive semicolons are illegal according to the JLS but JavaNCSS still tolerates them (thought JavaNCSS is still more strict as 'javac'). Nevertheless they are never counted as two statements.Cyclomatic Complexity Number (CCN)CCN is also know as McCabe Metric. There exists a much hyped theory behind it based on graph theory, but it all comes down to simply counting 'if', 'for', 'while' statements etc. in a method. Whenever the control flow of a method splits, the "CCN counter" gets incremented by one.Each method has a minimum value of 1 per default. For each of the following Java keywords/statements this value gets incremented by one:
  • if
  • for
  • while
  • case
  • catch
Also if the control flow of a method returns abortively the CCNvalue will be incremented by one:
  • if
  • for
An ordinary return at the end of method will not be counted.Note that 'else', 'default', and 'finally' don't increment the CCN value any further. On the other hand, a simple method with a 'switch' statement and a huge block of 'case' statements can have a surprisingly high CCN value (still it has the same value when converting a 'switch' block to an equivalent sequence of 'if' statements).