JavaNCSS Metric Results

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

The following document contains the results of a JavaNCSS metric analysis, using JavaNCSS version 32.53.
JavaNCSS web site.

Packages

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

Packages sorted by NCSS.

PackageClassesMethodsNCSSJavadocsJavadoc linesSingle lines commentMulti lines comment
joptsimple29178783767550627
joptsimple.internal1263375322200264
joptsimple.util316751462072
Classes totalMethods totalNCSS totalJavadocsJavadoc linesSingle lines commentMulti lines comment
44257123312210370963

Objects

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

TOP 30 classes containing the most NCSS.

ObjectNCSSMethodsClassesJavadocs
joptsimple.OptionParser11229013
joptsimple.ArgumentAcceptingOptionSpec952408
joptsimple.OptionSet9219012
joptsimple.internal.AbbreviationMap861207
joptsimple.BuiltinHelpFormatter62911
joptsimple.internal.ColumnarData601205
joptsimple.internal.Column58911
joptsimple.OptionSpecTokenizer47701
joptsimple.AbstractOptionSpec421201
joptsimple.internal.Reflection42804
joptsimple.ParserRules28801
joptsimple.util.DateConverter25606
joptsimple.OptionException24702
joptsimple.internal.Strings24606
joptsimple.OptionalArgumentOptionSpec23401
joptsimple.OptionParserState22321
joptsimple.util.KeyValuePair22502
joptsimple.NoArgumentOptionSpec211001
joptsimple.internal.Classes18303
joptsimple.OptionSpecBuilder16403
joptsimple.ArgumentList14501
joptsimple.OptionParserState.OptionParserState14100
joptsimple.util.RegexMatcher14506
joptsimple.internal.MethodInvokingValueConverter12401
joptsimple.OptionArgumentConversionException10201
joptsimple.internal.ConstructorInvokingValueConverter10401
joptsimple.OptionDescriptor9809
joptsimple.RequiredArgumentOptionSpec9301
joptsimple.AlternativeLongOptionSpec8201
joptsimple.internal.ColumnWidthCalculator8101

TOP 30 classes containing the most methods.

ObjectNCSSMethodsClassesJavadocs
joptsimple.OptionParser11229013
joptsimple.ArgumentAcceptingOptionSpec952408
joptsimple.OptionSet9219012
joptsimple.AbstractOptionSpec421201
joptsimple.internal.AbbreviationMap861207
joptsimple.internal.ColumnarData601205
joptsimple.NoArgumentOptionSpec211001
joptsimple.BuiltinHelpFormatter62911
joptsimple.internal.Column58911
joptsimple.OptionDescriptor9809
joptsimple.ParserRules28801
joptsimple.internal.Reflection42804
joptsimple.OptionException24702
joptsimple.OptionSpecTokenizer47701
joptsimple.internal.Strings24606
joptsimple.util.DateConverter25606
joptsimple.ArgumentList14501
joptsimple.util.KeyValuePair22502
joptsimple.util.RegexMatcher14506
joptsimple.OptionSpecBuilder16403
joptsimple.OptionalArgumentOptionSpec23401
joptsimple.internal.ConstructorInvokingValueConverter10401
joptsimple.internal.MethodInvokingValueConverter12401
joptsimple.OptionParserState22321
joptsimple.OptionSpec4304
joptsimple.RequiredArgumentOptionSpec9301
joptsimple.ValueConverter4304
joptsimple.internal.Classes18303
joptsimple.AlternativeLongOptionSpec8201
joptsimple.IllegalOptionSpecificationException6201

Averages.

NCSS averageProgram NCSSClasses averageMethods averageJavadocs average
24.801,233.000.095.842.77

Methods

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

TOP 30 Methods containing the most NCSS.

MethodsNCSSCCNJavadocs
joptsimple.internal.AbbreviationMap.add(boolean[],V,int,int)1770
joptsimple.OptionParserState.moreOptions(boolean)1610
joptsimple.OptionSpecTokenizer.next()1680
joptsimple.AbstractOptionSpec.arrangeOptions(String)1550
joptsimple.OptionParserState.OptionParserState.handleArgument(OptionParser,ArgumentList,OptionSet)1450
joptsimple.BuiltinHelpFormatter.addHelpLineWithArgument(OptionDescriptor,char,char)1350
joptsimple.internal.AbbreviationMap.remove(boolean[],int,int)1390
joptsimple.BuiltinHelpFormatter.format(OptionDescriptor)1240
joptsimple.OptionalArgumentOptionSpec.detectOptionArgument(OptionParser,ArgumentList,OptionSet)1250
joptsimple.OptionParser.handleShortOptionCluster(String,ArgumentList,OptionSet)1040
joptsimple.OptionSet.valueOf(V)1061
joptsimple.OptionSet.valuesOf(V)1051
joptsimple.OptionSet.addWithArgument(AbstractOptionSpec,String)1040
joptsimple.BuiltinHelpFormatter.createOptionDisplay(OptionDescriptor)950
joptsimple.OptionSet.equals(Object)980
joptsimple.internal.AbbreviationMap.removeAtEndOfKey()940
joptsimple.internal.Column.processNextEmbeddedLine(String)930
joptsimple.internal.Column.processNextWord(String,StringBuilder,int,int)920
joptsimple.internal.Reflection.findConverter(V)961
joptsimple.ArgumentAcceptingOptionSpec.convert(String)880
joptsimple.BuiltinHelpFormatter.addHelpLineFor(OptionDescriptor)830
joptsimple.OptionException.multipleOptionMessage()830
joptsimple.OptionParser.parse(String)821
joptsimple.internal.AbbreviationMap.get(String)841
joptsimple.internal.Reflection.reflectionException(Exception)870
joptsimple.ArgumentAcceptingOptionSpec.addArguments(OptionSet,String)730
joptsimple.ArgumentAcceptingOptionSpec.canConvertArgument(String)740
joptsimple.OptionParser.ensureRequiredOptions(OptionSet)760
joptsimple.OptionParser.validateOptionCharacters(options[])750
joptsimple.OptionSet.valueOf(String)741

Averages.

Program NCSSNCSS averageCCN averageJavadocs average
1,233.003.771.980.32

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).