BVDecompose.java
| Index Score | ||
|---|---|---|
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weka.classifiers |
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Weka |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| JAVA0083 | JAVA0083 Unnecessary instanceof test |  |
| DECL_COMMENTS | Comments in declarations | |
| DOC_COMMENT | Number of javadoc comment lines | |
| COMMENTS | Comment lines | |
| EXITS | Procedure exits | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| LINES | Number of lines in the source file | |
| SIZE | Size of the file in bytes | |
| LOGICAL_LINES | Number of statements | |
| JAVA0076 | JAVA0076 Use of magic number | |
| JAVA0267 | JAVA0267 Use of System.err | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| RETURNS | Number of return points from functions | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| OPERANDS | Number of operands | |
| PROGRAM_LENGTH | Halstead program length | |
| OPERATORS | Number of operators | |
| ELOC | Effective lines of code | |
| JAVA0082 | JAVA0082 Unnecessary widening cast | |
| COMPARISONS | Number of comparison operators | |
| BLOCKS | Number of blocks | |
| LOC | Lines of code | |
| LOOPS | Number of loops | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0166 | JAVA0166 Generic exception caught | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0078 | JAVA0078 Floating point values compared with == | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| EXEC_COMMENTS | Comments in executable code | |
| LINE_COMMENT | Number of line comments | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| UNIQUE_OPERATORS | Number of unique operators | |
| CYCLOMATIC | Cyclomatic complexity | |
| FUNCTIONS | Number of function declarations | |
| JAVA0100 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* BVDecompose.java
* Copyright (C) 1999 University of Waikato, Hamilton, New Zealand
*
*/
package weka.classifiers;
import weka.core.Attribute;
import weka.core.Instance;
import weka.core.Instances;
import weka.core.Option;
import weka.core.OptionHandler;
import weka.core.RevisionHandler;
import weka.core.RevisionUtils;
import weka.core.TechnicalInformation;
import weka.core.TechnicalInformationHandler;
import weka.core.Utils;
import weka.core.TechnicalInformation.Field;
import weka.core.TechnicalInformation.Type;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.Reader;
import java.util.Enumeration;
import java.util.Random;
import java.util.Vector;
/**
<!-- globalinfo-start -->
* Class for performing a Bias-Variance decomposition on any classifier using the method specified in:<br/>
* <br/>
* Ron Kohavi, David H. Wolpert: Bias Plus Variance Decomposition for Zero-One Loss Functions. In: Machine Learning: Proceedings of the Thirteenth International Conference, 275-283, 1996.
* <p/>
<!-- globalinfo-end -->
*
<!-- technical-bibtex-start -->
* BibTeX:
* <pre>
* @inproceedings{Kohavi1996,
* author = {Ron Kohavi and David H. Wolpert},
* booktitle = {Machine Learning: Proceedings of the Thirteenth International Conference},
* editor = {Lorenza Saitta},
* pages = {275-283},
* publisher = {Morgan Kaufmann},
* title = {Bias Plus Variance Decomposition for Zero-One Loss Functions},
* year = {1996},
* PS = {http://robotics.stanford.edu/\~ronnyk/biasVar.ps}
* }
* </pre>
* <p/>
<!-- technical-bibtex-end -->
*
<!-- options-start -->
* Valid options are: <p/>
*
* <pre> -c <class index>
* The index of the class attribute.
* (default last)</pre>
*
* <pre> -t <name of arff file>
* The name of the arff file used for the decomposition.</pre>
*
* <pre> -T <training pool size>
* The number of instances placed in the training pool.
* The remainder will be used for testing. (default 100)</pre>
*
* <pre> -s <seed>
* The random number seed used.</pre>
*
* <pre> -x <num>
* The number of training repetitions used.
* (default 50)</pre>
*
* <pre> -D
* Turn on debugging output.</pre>
*
* <pre> -W <classifier class name>
* Full class name of the learner used in the decomposition.
* eg: weka.classifiers.bayes.NaiveBayes</pre>
*
* <pre>
* Options specific to learner weka.classifiers.rules.ZeroR:
* </pre>
*
* <pre> -D
* If set, classifier is run in debug mode and
* may output additional info to the console</pre>
*
<!-- options-end -->
*
* Options after -- are passed to the designated sub-learner. <p>
*
* @author Len Trigg (trigg@cs.waikato.ac.nz)
* @version $Revision: 1.15 $
*/
public class BVDecompose
implements OptionHandler, TechnicalInformationHandler, RevisionHandler {
/** Debugging mode, gives extra output if true */
protected boolean m_Debug;
/** An instantiated base classifier used for getting and testing options. */
protected Classifier m_Classifier = new weka.classifiers.rules.ZeroR();
/** The options to be passed to the base classifier. */
protected String [] m_ClassifierOptions;
/** The number of train iterations */
protected int m_TrainIterations = 50;
/** The name of the data file used for the decomposition */
protected String m_DataFileName;
/** The index of the class attribute */
protected int m_ClassIndex = -1;
/** The random number seed */
protected int m_Seed = 1;
/** The calculated bias (squared) */
protected double m_Bias;
/** The calculated variance */
protected double m_Variance;
/** The calculated sigma (squared) */
protected double m_Sigma;
/** The error rate */
protected double m_Error;
/** The number of instances used in the training pool */
protected int m_TrainPoolSize = 100;
/**
* Returns a string describing this object
* @return a description of the classifier suitable for
* displaying in the explorer/experimenter gui
*/
public String globalInfo() {
return
"Class for performing a Bias-Variance decomposition on any classifier "
+ "using the method specified in:\n\n"
+ getTechnicalInformation().toString();
}
/**
* Returns an instance of a TechnicalInformation object, containing
* detailed information about the technical background of this class,
* e.g., paper reference or book this class is based on.
*
* @return the technical information about this class
*/
public TechnicalInformation getTechnicalInformation() {
TechnicalInformation result;
result = new TechnicalInformation(Type.INPROCEEDINGS);
result.setValue(Field.AUTHOR, "Ron Kohavi and David H. Wolpert");
result.setValue(Field.YEAR, "1996");
result.setValue(Field.TITLE, "Bias Plus Variance Decomposition for Zero-One Loss Functions");
result.setValue(Field.BOOKTITLE, "Machine Learning: Proceedings of the Thirteenth International Conference");
result.setValue(Field.PUBLISHER, "Morgan Kaufmann");
result.setValue(Field.EDITOR, "Lorenza Saitta");
result.setValue(Field.PAGES, "275-283");
result.setValue(Field.PS, "http://robotics.stanford.edu/~ronnyk/biasVar.ps");
return result;
}
/**
* Returns an enumeration describing the available options.
*
* @return an enumeration of all the available options.
*/
public Enumeration listOptions() {
Vector newVector = new Vector(7);
newVector.addElement(new Option(
"\tThe index of the class attribute.\n"+
"\t(default last)",
"c", 1, "-c <class index>"));
newVector.addElement(new Option(
"\tThe name of the arff file used for the decomposition.",
"t", 1, "-t <name of arff file>"));
newVector.addElement(new Option(
"\tThe number of instances placed in the training pool.\n"
+ "\tThe remainder will be used for testing. (default 100)",
"T", 1, "-T <training pool size>"));
newVector.addElement(new Option(
"\tThe random number seed used.",
"s", 1, "-s <seed>"));
newVector.addElement(new Option(
"\tThe number of training repetitions used.\n"
+"\t(default 50)",
"x", 1, "-x <num>"));
newVector.addElement(new Option(
"\tTurn on debugging output.",
"D", 0, "-D"));
newVector.addElement(new Option(
"\tFull class name of the learner used in the decomposition.\n"
+"\teg: weka.classifiers.bayes.NaiveBayes",
"W", 1, "-W <classifier class name>"));
if ((m_Classifier != null) &&
(m_Classifier instanceof OptionHandler)) {
newVector.addElement(new Option(
"",
"", 0, "\nOptions specific to learner "
+ m_Classifier.getClass().getName()
+ ":"));
Enumeration enu = ((OptionHandler)m_Classifier).listOptions();
while (enu.hasMoreElements()) {
newVector.addElement(enu.nextElement());
}
}
return newVector.elements();
}
/**
* Parses a given list of options. <p/>
*
<!-- options-start -->
* Valid options are: <p/>
*
* <pre> -c <class index>
* The index of the class attribute.
* (default last)</pre>
*
* <pre> -t <name of arff file>
* The name of the arff file used for the decomposition.</pre>
*
* <pre> -T <training pool size>
* The number of instances placed in the training pool.
* The remainder will be used for testing. (default 100)</pre>
*
* <pre> -s <seed>
* The random number seed used.</pre>
*
* <pre> -x <num>
* The number of training repetitions used.
* (default 50)</pre>
*
* <pre> -D
* Turn on debugging output.</pre>
*
* <pre> -W <classifier class name>
* Full class name of the learner used in the decomposition.
* eg: weka.classifiers.bayes.NaiveBayes</pre>
*
* <pre>
* Options specific to learner weka.classifiers.rules.ZeroR:
* </pre>
*
* <pre> -D
* If set, classifier is run in debug mode and
* may output additional info to the console</pre>
*
<!-- options-end -->
*
* Options after -- are passed to the designated sub-learner. <p>
*
* @param options the list of options as an array of strings
* @throws Exception if an option is not supported
*/
public void setOptions(String[] options) throws Exception {
setDebug(Utils.getFlag('D', options));
String classIndex = Utils.getOption('c', options);
if (classIndex.length() != 0) {
if (classIndex.toLowerCase().equals("last")) {
setClassIndex(0);
} else if (classIndex.toLowerCase().equals("first")) {
setClassIndex(1);
} else {
setClassIndex(Integer.parseInt(classIndex));
}
} else {
setClassIndex(0);
}
String trainIterations = Utils.getOption('x', options);
if (trainIterations.length() != 0) {
setTrainIterations(Integer.parseInt(trainIterations));
} else {
setTrainIterations(50);
}
String trainPoolSize = Utils.getOption('T', options);
if (trainPoolSize.length() != 0) {
setTrainPoolSize(Integer.parseInt(trainPoolSize));
} else {
setTrainPoolSize(100);
}
String seedString = Utils.getOption('s', options);
if (seedString.length() != 0) {
setSeed(Integer.parseInt(seedString));
} else {
setSeed(1);
}
String dataFile = Utils.getOption('t', options);
if (dataFile.length() == 0) {
throw new Exception("An arff file must be specified"
+ " with the -t option.");
}
setDataFileName(dataFile);
String classifierName = Utils.getOption('W', options);
if (classifierName.length() == 0) {
throw new Exception("A learner must be specified with the -W option.");
}
setClassifier(Classifier.forName(classifierName,
Utils.partitionOptions(options)));
}
/**
* Gets the current settings of the CheckClassifier.
*
* @return an array of strings suitable for passing to setOptions
*/
public String [] getOptions() {
String [] classifierOptions = new String [0];
if ((m_Classifier != null) &&
(m_Classifier instanceof OptionHandler)) {
classifierOptions = ((OptionHandler)m_Classifier).getOptions();
}
String [] options = new String [classifierOptions.length + 14];
int current = 0;
if (getDebug()) {
options[current++] = "-D";
}
options[current++] = "-c"; options[current++] = "" + getClassIndex();
options[current++] = "-x"; options[current++] = "" + getTrainIterations();
options[current++] = "-T"; options[current++] = "" + getTrainPoolSize();
options[current++] = "-s"; options[current++] = "" + getSeed();
if (getDataFileName() != null) {
options[current++] = "-t"; options[current++] = "" + getDataFileName();
}
if (getClassifier() != null) {
options[current++] = "-W";
options[current++] = getClassifier().getClass().getName();
}
options[current++] = "--";
System.arraycopy(classifierOptions, 0, options, current,
classifierOptions.length);
current += classifierOptions.length;
while (current < options.length) {
options[current++] = "";
}
return options;
}
/**
* Get the number of instances in the training pool.
*
* @return number of instances in the training pool.
*/
public int getTrainPoolSize() {
return m_TrainPoolSize;
}
/**
* Set the number of instances in the training pool.
*
* @param numTrain number of instances in the training pool.
*/
public void setTrainPoolSize(int numTrain) {
m_TrainPoolSize = numTrain;
}
/**
* Set the classifiers being analysed
*
* @param newClassifier the Classifier to use.
*/
public void setClassifier(Classifier newClassifier) {
m_Classifier = newClassifier;
}
/**
* Gets the name of the classifier being analysed
*
* @return the classifier being analysed.
*/
public Classifier getClassifier() {
return m_Classifier;
}
/**
* Sets debugging mode
*
* @param debug true if debug output should be printed
*/
public void setDebug(boolean debug) {
m_Debug = debug;
}
/**
* Gets whether debugging is turned on
*
* @return true if debugging output is on
*/
public boolean getDebug() {
return m_Debug;
}
/**
* Sets the random number seed
*
* @param seed the random number seed
*/
public void setSeed(int seed) {
m_Seed = seed;
}
/**
* Gets the random number seed
*
* @return the random number seed
*/
public int getSeed() {
return m_Seed;
}
/**
* Sets the maximum number of boost iterations
*
* @param trainIterations the number of boost iterations
*/
public void setTrainIterations(int trainIterations) {
m_TrainIterations = trainIterations;
}
/**
* Gets the maximum number of boost iterations
*
* @return the maximum number of boost iterations
*/
public int getTrainIterations() {
return m_TrainIterations;
}
/**
* Sets the name of the data file used for the decomposition
*
* @param dataFileName the data file to use
*/
public void setDataFileName(String dataFileName) {
m_DataFileName = dataFileName;
}
/**
* Get the name of the data file used for the decomposition
*
* @return the name of the data file
*/
public String getDataFileName() {
return m_DataFileName;
}
/**
* Get the index (starting from 1) of the attribute used as the class.
*
* @return the index of the class attribute
*/
public int getClassIndex() {
return m_ClassIndex + 1;
}
/**
* Sets index of attribute to discretize on
*
* @param classIndex the index (starting from 1) of the class attribute
*/
public void setClassIndex(int classIndex) {
m_ClassIndex = classIndex - 1;
}
/**
* Get the calculated bias squared
*
* @return the bias squared
*/
public double getBias() {
return m_Bias;
}
/**
* Get the calculated variance
*
* @return the variance
*/
public double getVariance() {
return m_Variance;
}
/**
* Get the calculated sigma squared
*
* @return the sigma squared
*/
public double getSigma() {
return m_Sigma;
}
/**
* Get the calculated error rate
*
* @return the error rate
*/
public double getError() {
return m_Error;
}
/**
* Carry out the bias-variance decomposition
*
* @throws Exception if the decomposition couldn't be carried out
*/
public void decompose() throws Exception {
Reader dataReader = new BufferedReader(new FileReader(m_DataFileName));
Instances data = new Instances(dataReader);
if (m_ClassIndex < 0) {
data.setClassIndex(data.numAttributes() - 1);
} else {
data.setClassIndex(m_ClassIndex);
}
if (data.classAttribute().type() != Attribute.NOMINAL) {
throw new Exception("Class attribute must be nominal");
}
int numClasses = data.numClasses();
data.deleteWithMissingClass();
if (data.checkForStringAttributes()) {
throw new Exception("Can't handle string attributes!");
}
if (data.numInstances() < 2 * m_TrainPoolSize) {
throw new Exception("The dataset must contain at least "
+ (2 * m_TrainPoolSize) + " instances");
}
Random random = new Random(m_Seed);
data.randomize(random);
Instances trainPool = new Instances(data, 0, m_TrainPoolSize);
Instances test = new Instances(data, m_TrainPoolSize,
data.numInstances() - m_TrainPoolSize);
int numTest = test.numInstances();
double [][] instanceProbs = new double [numTest][numClasses];
m_Error = 0;
for (int i = 0; i < m_TrainIterations; i++) {
if (m_Debug) {
System.err.println("Iteration " + (i + 1));
}
trainPool.randomize(random);
Instances train = new Instances(trainPool, 0, m_TrainPoolSize / 2);
Classifier current = Classifier.makeCopy(m_Classifier);
current.buildClassifier(train);
//// Evaluate the classifier on test, updating BVD stats
for (int j = 0; j < numTest; j++) {
int pred = (int)current.classifyInstance(test.instance(j));
if (pred != test.instance(j).classValue()) {
m_Error++;
}
instanceProbs[j][pred]++;
}
}
m_Error /= (m_TrainIterations * numTest);
// Average the BV over each instance in test.
m_Bias = 0;
m_Variance = 0;
m_Sigma = 0;
for (int i = 0; i < numTest; i++) {
Instance current = test.instance(i);
double [] predProbs = instanceProbs[i];
double pActual, pPred;
double bsum = 0, vsum = 0, ssum = 0;
for (int j = 0; j < numClasses; j++) {
pActual = (current.classValue() == j) ? 1 : 0; // Or via 1NN from test data?
pPred = predProbs[j] / m_TrainIterations;
bsum += (pActual - pPred) * (pActual - pPred)
- pPred * (1 - pPred) / (m_TrainIterations - 1);
vsum += pPred * pPred;
ssum += pActual * pActual;
}
m_Bias += bsum;
m_Variance += (1 - vsum);
m_Sigma += (1 - ssum);
}
m_Bias /= (2 * numTest);
m_Variance /= (2 * numTest);
m_Sigma /= (2 * numTest);
if (m_Debug) {
System.err.println("Decomposition finished");
}
}
/**
* Returns description of the bias-variance decomposition results.
*
* @return the bias-variance decomposition results as a string
*/
public String toString() {
String result = "\nBias-Variance Decomposition\n";
if (getClassifier() == null) {
return "Invalid setup";
}
result += "\nClassifier : " + getClassifier().getClass().getName();
if (getClassifier() instanceof OptionHandler) {
result += Utils.joinOptions(((OptionHandler)m_Classifier).getOptions());
}
result += "\nData File : " + getDataFileName();
result += "\nClass Index : ";
if (getClassIndex() == 0) {
result += "last";
} else {
result += getClassIndex();
}
result += "\nTraining Pool: " + getTrainPoolSize();
result += "\nIterations : " + getTrainIterations();
result += "\nSeed : " + getSeed();
result += "\nError : " + Utils.doubleToString(getError(), 6, 4);
result += "\nSigma^2 : " + Utils.doubleToString(getSigma(), 6, 4);
result += "\nBias^2 : " + Utils.doubleToString(getBias(), 6, 4);
result += "\nVariance : " + Utils.doubleToString(getVariance(), 6, 4);
return result + "\n";
}
/**
* Returns the revision string.
*
* @return the revision
*/
public String getRevision() {
return RevisionUtils.extract("$Revision: 1.15 $");
}
/**
* Test method for this class
*
* @param args the command line arguments
*/
public static void main(String [] args) {
try {
BVDecompose bvd = new BVDecompose();
try {
bvd.setOptions(args);
Utils.checkForRemainingOptions(args);
} catch (Exception ex) {
String result = ex.getMessage() + "\nBVDecompose Options:\n\n";
Enumeration enu = bvd.listOptions();
while (enu.hasMoreElements()) {
Option option = (Option) enu.nextElement();
result += option.synopsis() + "\n" + option.description() + "\n";
}
throw new Exception(result);
}
bvd.decompose();
System.out.println(bvd.toString());
} catch (Exception ex) {
System.err.println(ex.getMessage());
}
}
}
The table below shows all metrics for BVDecompose.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 68.00 | Number of blocks | |
| BLOCK_COMMENT | 20.00 | Number of block comment lines | |
| COMMENTS | 280.00 | Comment lines | |
| COMMENT_DENSITY | 0.98 | Comment density | |
| COMPARISONS | 49.00 | Number of comparison operators | |
| CYCLOMATIC | 62.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 42.00 | Comments in declarations | |
| DOC_COMMENT | 258.00 | Number of javadoc comment lines | |
| ELOC | 286.00 | Effective lines of code | |
| EXEC_COMMENTS | 2.00 | Comments in executable code | |
| EXITS | 68.00 | Procedure exits | |
| FUNCTIONS | 27.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 72.44 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 57.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 1.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 8.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 2.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 3.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 3.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 1.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 1.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 0.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 1.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 80.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 2.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 3.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 1.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 3.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 718.00 | Number of lines in the source file | |
| LINE_COMMENT | 2.00 | Number of line comments | |
| LOC | 345.00 | Lines of code | |
| LOGICAL_LINES | 196.00 | Number of statements | |
| LOOPS | 7.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 822.00 | Number of operands | |
| OPERATORS | 1513.00 | Number of operators | |
| PARAMS | 9.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2335.00 | Halstead program length | |
| PROGRAM_VOCAB | 307.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 48.00 | Number of return points from functions | |
| SIZE | 20224.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 261.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 46.00 | Number of unique operators | |
| WHITESPACE | 93.00 | Number of whitespace lines | |