CostMatrix.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 | |
|---|---|---|
| LOOPS | Number of loops |  |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| COMPARISONS | Number of comparison operators | |
| RETURNS | Number of return points from functions | |
| BLOCKS | Number of blocks | |
| CYCLOMATIC | Cyclomatic complexity | |
| OPERATORS | Number of operators | |
| LOGICAL_LINES | Number of statements | |
| PROGRAM_LENGTH | Halstead program length | |
| SIZE | Size of the file in bytes | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| DECL_COMMENTS | Comments in declarations | |
| LINES | Number of lines in the source file | |
| LOC | Lines of code | |
| OPERANDS | Number of operands | |
| ELOC | Effective lines of code | |
| EXEC_COMMENTS | Comments in executable code | |
| DOC_COMMENT | Number of javadoc comment lines | |
| COMMENTS | Comment lines | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0171 | JAVA0171 Unused local variable | |
| UNIQUE_OPERATORS | Number of unique operators | |
| LINE_COMMENT | Number of line comments | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| EXITS | Procedure exits | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| PARAMS | Number of formal parameter declarations | |
| NEST_DEPTH | Maximum nesting depth | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| 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.
*/
/*
* CostMatrix.java
* Copyright (C) 2006 University of Waikato, Hamilton, New Zealand
*
*/
package weka.classifiers;
import weka.core.AttributeExpression;
import weka.core.Instance;
import weka.core.Instances;
import weka.core.Matrix;
import weka.core.RevisionHandler;
import weka.core.RevisionUtils;
import weka.core.Utils;
import java.io.LineNumberReader;
import java.io.Reader;
import java.io.Serializable;
import java.io.StreamTokenizer;
import java.io.Writer;
import java.util.Random;
import java.util.StringTokenizer;
/**
* Class for storing and manipulating a misclassification cost matrix.
* The element at position i,j in the matrix is the penalty for classifying
* an instance of class j as class i. Cost values can be fixed or
* computed on a per-instance basis (cost sensitive evaluation only)
* from the value of an attribute or an expression involving
* attribute(s).
*
* @author Mark Hall
* @author Richard Kirkby (rkirkby@cs.waikato.ac.nz)
* @version $Revision: 1.17 $
*/
public class CostMatrix implements Serializable, RevisionHandler {
/** for serialization */
private static final long serialVersionUID = -1973792250544554965L;
private int m_size;
/** [rows][columns] */
protected Object [][] m_matrix;
/** The deafult file extension for cost matrix files */
public static String FILE_EXTENSION = ".cost";
/**
* Creates a default cost matrix of a particular size.
* All diagonal values will be 0 and all non-diagonal values 1.
*
* @param numOfClasses the number of classes that the cost matrix holds.
*/
public CostMatrix(int numOfClasses) {
m_size = numOfClasses;
initialize();
}
/**
* Creates a cost matrix that is a copy of another.
*
* @param toCopy the matrix to copy.
*/
public CostMatrix(CostMatrix toCopy) {
this(toCopy.size());
for (int i = 0; i < m_size; i++) {
for (int j = 0; j < m_size; j++) {
setCell(i, j, toCopy.getCell(i, j));
}
}
}
/**
* Initializes the matrix
*/
public void initialize() {
m_matrix = new Object[m_size][m_size];
for (int i = 0; i < m_size; i++) {
for (int j = 0; j < m_size; j++) {
setCell(i, j, i == j ? new Double(0.0) : new Double(1.0));
}
}
}
/**
* The number of rows (and columns)
* @return the size of the matrix
*/
public int size() {
return m_size;
}
/**
* Same as size
* @return the number of columns
*/
public int numColumns() {
return size();
}
/**
* Same as size
* @return the number of rows
*/
public int numRows() {
return size();
}
private boolean replaceStrings() throws Exception {
boolean nonDouble = false;
for (int i = 0; i < m_size; i++) {
for (int j = 0; j < m_size; j++) {
if (getCell(i, j) instanceof String) {
AttributeExpression temp = new AttributeExpression();
temp.convertInfixToPostfix((String)getCell(i, j));
setCell(i, j, temp);
nonDouble = true;
} else if (getCell(i, j) instanceof AttributeExpression) {
nonDouble = true;
}
}
}
return nonDouble;
}
/**
* Applies the cost matrix to a set of instances. If a random number generator is
* supplied the instances will be resampled, otherwise they will be rewighted.
* Adapted from code once sitting in Instances.java
*
* @param data the instances to reweight.
* @param random a random number generator for resampling, if null then instances are
* rewighted.
* @return a new dataset reflecting the cost of misclassification.
* @exception Exception if the data has no class or the matrix in inappropriate.
*/
public Instances applyCostMatrix(Instances data, Random random)
throws Exception {
double sumOfWeightFactors = 0, sumOfMissClassWeights,
sumOfWeights;
double [] weightOfInstancesInClass, weightFactor, weightOfInstances;
Instances newData;
if (data.classIndex() < 0) {
throw new Exception("Class index is not set!");
}
if (size() != data.numClasses()) {
throw new Exception("Misclassification cost matrix has "+
"wrong format!");
}
// are there any non-fixed, per-instance costs defined in the matrix?
if (replaceStrings()) {
// could reweight in the two class case
if (data.classAttribute().numValues() > 2) {
throw new Exception("Can't resample/reweight instances using "
+"non-fixed cost values when there are more "
+"than two classes!");
} else {
// Store new weights
weightOfInstances = new double[data.numInstances()];
for (int i = 0; i < data.numInstances(); i++) {
Instance inst = data.instance(i);
int classValIndex = (int)inst.classValue();
double factor = 1.0;
Object element = (classValIndex == 0)
? getCell(classValIndex, 1)
: getCell(classValIndex, 0);
if (element instanceof Double) {
factor = ((Double)element).doubleValue();
} else {
factor = ((AttributeExpression)element).evaluateExpression(inst);
}
weightOfInstances[i] = inst.weight() * factor;
/* System.err.println("Multiplying " + inst.classAttribute().value((int)inst.classValue())
+" by factor " + factor); */
}
// Change instances weight or do resampling
if (random != null) {
return data.resampleWithWeights(random, weightOfInstances);
} else {
Instances instances = new Instances(data);
for (int i = 0; i < data.numInstances(); i++) {
instances.instance(i).setWeight(weightOfInstances[i]);
}
return instances;
}
}
}
weightFactor = new double[data.numClasses()];
weightOfInstancesInClass = new double[data.numClasses()];
for (int j = 0; j < data.numInstances(); j++) {
weightOfInstancesInClass[(int)data.instance(j).classValue()] +=
data.instance(j).weight();
}
sumOfWeights = Utils.sum(weightOfInstancesInClass);
// normalize the matrix if not already
for (int i=0; i< m_size; i++) {
if (!Utils.eq(((Double)getCell(i, i)).doubleValue(), 0)) {
CostMatrix normMatrix = new CostMatrix(this);
normMatrix.normalize();
return normMatrix.applyCostMatrix(data, random);
}
}
for (int i = 0; i < data.numClasses(); i++) {
// Using Kai Ming Ting's formula for deriving weights for
// the classes and Breiman's heuristic for multiclass
// problems.
sumOfMissClassWeights = 0;
for (int j = 0; j < data.numClasses(); j++) {
if (Utils.sm(((Double)getCell(i,j)).doubleValue(),0)) {
throw new Exception("Neg. weights in misclassification "+
"cost matrix!");
}
sumOfMissClassWeights
+= ((Double)getCell(i,j)).doubleValue();
}
weightFactor[i] = sumOfMissClassWeights * sumOfWeights;
sumOfWeightFactors += sumOfMissClassWeights *
weightOfInstancesInClass[i];
}
for (int i = 0; i < data.numClasses(); i++) {
weightFactor[i] /= sumOfWeightFactors;
}
// Store new weights
weightOfInstances = new double[data.numInstances()];
for (int i = 0; i < data.numInstances(); i++) {
weightOfInstances[i] = data.instance(i).weight()*
weightFactor[(int)data.instance(i).classValue()];
}
// Change instances weight or do resampling
if (random != null) {
return data.resampleWithWeights(random, weightOfInstances);
} else {
Instances instances = new Instances(data);
for (int i = 0; i < data.numInstances(); i++) {
instances.instance(i).setWeight(weightOfInstances[i]);
}
return instances;
}
}
/**
* Calculates the expected misclassification cost for each possible class value,
* given class probability estimates.
*
* @param classProbs the class probability estimates.
* @return the expected costs.
* @exception Exception if the wrong number of class probabilities is supplied.
*/
public double[] expectedCosts(double[] classProbs) throws Exception {
if (classProbs.length != m_size) {
throw new Exception("Length of probability estimates don't "
+"match cost matrix");
}
double[] costs = new double[m_size];
for (int x = 0; x < m_size; x++) {
for (int y = 0; y < m_size; y++) {
Object element = getCell(y, x);
if (!(element instanceof Double)) {
throw new Exception("Can't use non-fixed costs in "
+"computing expected costs.");
}
costs[x] += classProbs[y] * ((Double)element).doubleValue();
}
}
return costs;
}
/**
* Calculates the expected misclassification cost for each possible class value,
* given class probability estimates.
*
* @param classProbs the class probability estimates.
* @param inst the current instance for which the class probabilites
* apply. Is used for computing any non-fixed cost values.
* @return the expected costs.
* @exception Exception if something goes wrong
*/
public double[] expectedCosts(double [] classProbs,
Instance inst) throws Exception {
if (classProbs.length != m_size) {
throw new Exception("Length of probability estimates don't "
+"match cost matrix");
}
if (!replaceStrings()) {
return expectedCosts(classProbs);
}
double[] costs = new double[m_size];
for (int x = 0; x < m_size; x++) {
for (int y = 0; y < m_size; y++) {
Object element = getCell(y, x);
double costVal;
if (!(element instanceof Double)) {
costVal =
((AttributeExpression)element).evaluateExpression(inst);
} else {
costVal = ((Double)element).doubleValue();
}
costs[x] += classProbs[y] * costVal;
}
}
return costs;
}
/**
* Gets the maximum cost for a particular class value.
*
* @param classVal the class value.
* @return the maximum cost.
* @exception Exception if cost matrix contains non-fixed
* costs
*/
public double getMaxCost(int classVal) throws Exception {
double maxCost = Double.NEGATIVE_INFINITY;
for (int i = 0; i < m_size; i++) {
Object element = getCell(classVal, i);
if (!(element instanceof Double)) {
throw new Exception("Can't use non-fixed costs when "
+"getting max cost.");
}
double cost = ((Double)element).doubleValue();
if (cost > maxCost) maxCost = cost;
}
return maxCost;
}
/**
* Gets the maximum cost for a particular class value.
*
* @param classVal the class value.
* @return the maximum cost.
* @exception Exception if cost matrix contains non-fixed
* costs
*/
public double getMaxCost(int classVal, Instance inst)
throws Exception {
if (!replaceStrings()) {
return getMaxCost(classVal);
}
double maxCost = Double.NEGATIVE_INFINITY;
double cost;
for (int i = 0; i < m_size; i++) {
Object element = getCell(classVal, i);
if (!(element instanceof Double)) {
cost =
((AttributeExpression)element).evaluateExpression(inst);
} else {
cost = ((Double)element).doubleValue();
}
if (cost > maxCost) maxCost = cost;
}
return maxCost;
}
/**
* Normalizes the matrix so that the diagonal contains zeros.
*
*/
public void normalize() {
for (int y=0; y<m_size; y++) {
double diag = ((Double)getCell(y, y)).doubleValue();
for (int x=0; x<m_size; x++) {
setCell(x, y, new Double(((Double)getCell(x, y)).
doubleValue() - diag));
}
}
}
/**
* Loads a cost matrix in the old format from a reader. Adapted from code once sitting
* in Instances.java
*
* @param reader the reader to get the values from.
* @exception Exception if the matrix cannot be read correctly.
*/
public void readOldFormat(Reader reader) throws Exception {
StreamTokenizer tokenizer;
int currentToken;
double firstIndex, secondIndex, weight;
tokenizer = new StreamTokenizer(reader);
initialize();
tokenizer.commentChar('%');
tokenizer.eolIsSignificant(true);
while (StreamTokenizer.TT_EOF !=
(currentToken = tokenizer.nextToken())) {
// Skip empty lines
if (currentToken == StreamTokenizer.TT_EOL) {
continue;
}
// Get index of first class.
if (currentToken != StreamTokenizer.TT_NUMBER) {
throw new Exception("Only numbers and comments allowed "+
"in cost file!");
}
firstIndex = tokenizer.nval;
if (!Utils.eq((double)(int)firstIndex,firstIndex)) {
throw new Exception("First number in line has to be "+
"index of a class!");
}
if ((int)firstIndex >= size()) {
throw new Exception("Class index out of range!");
}
// Get index of second class.
if (StreamTokenizer.TT_EOF ==
(currentToken = tokenizer.nextToken())) {
throw new Exception("Premature end of file!");
}
if (currentToken == StreamTokenizer.TT_EOL) {
throw new Exception("Premature end of line!");
}
if (currentToken != StreamTokenizer.TT_NUMBER) {
throw new Exception("Only numbers and comments allowed "+
"in cost file!");
}
secondIndex = tokenizer.nval;
if (!Utils.eq((double)(int)secondIndex,secondIndex)) {
throw new Exception("Second number in line has to be "+
"index of a class!");
}
if ((int)secondIndex >= size()) {
throw new Exception("Class index out of range!");
}
if ((int)secondIndex == (int)firstIndex) {
throw new Exception("Diagonal of cost matrix non-zero!");
}
// Get cost factor.
if (StreamTokenizer.TT_EOF ==
(currentToken = tokenizer.nextToken())) {
throw new Exception("Premature end of file!");
}
if (currentToken == StreamTokenizer.TT_EOL) {
throw new Exception("Premature end of line!");
}
if (currentToken != StreamTokenizer.TT_NUMBER) {
throw new Exception("Only numbers and comments allowed "+
"in cost file!");
}
weight = tokenizer.nval;
if (!Utils.gr(weight,0)) {
throw new Exception("Only positive weights allowed!");
}
setCell((int)firstIndex, (int)secondIndex,
new Double(weight));
}
}
/**
* Reads a matrix from a reader. The first line in the file should
* contain the number of rows and columns. Subsequent lines
* contain elements of the matrix.
* (FracPete: taken from old weka.core.Matrix class)
*
* @param reader the reader containing the matrix
* @throws Exception if an error occurs
* @see #write(Writer)
*/
public CostMatrix(Reader reader) throws Exception {
LineNumberReader lnr = new LineNumberReader(reader);
String line;
int currentRow = -1;
while ((line = lnr.readLine()) != null) {
// Comments
if (line.startsWith("%")) {
continue;
}
StringTokenizer st = new StringTokenizer(line);
// Ignore blank lines
if (!st.hasMoreTokens()) {
continue;
}
if (currentRow < 0) {
int rows = Integer.parseInt(st.nextToken());
if (!st.hasMoreTokens()) {
throw new Exception("Line " + lnr.getLineNumber()
+ ": expected number of columns");
}
int cols = Integer.parseInt(st.nextToken());
if (rows != cols) {
throw new Exception("Trying to create a non-square cost "
+"matrix");
}
// m_matrix = new Object[rows][cols];
m_size = rows;
initialize();
currentRow++;
continue;
} else {
if (currentRow == m_size) {
throw new Exception("Line " + lnr.getLineNumber()
+ ": too many rows provided");
}
for (int i = 0; i < m_size; i++) {
if (!st.hasMoreTokens()) {
throw new Exception("Line " + lnr.getLineNumber()
+ ": too few matrix elements provided");
}
String nextTok = st.nextToken();
// try to parse as a double first
Double val = null;
try {
val = new Double(nextTok);
double value = val.doubleValue();
} catch (Exception ex) {
val = null;
}
if (val == null) {
setCell(currentRow, i, nextTok);
} else {
setCell(currentRow, i, val);
}
}
currentRow++;
}
}
if (currentRow == -1) {
throw new Exception("Line " + lnr.getLineNumber()
+ ": expected number of rows");
} else if (currentRow != m_size) {
throw new Exception("Line " + lnr.getLineNumber()
+ ": too few rows provided");
}
}
/**
* Writes out a matrix. The format can be read via the
* CostMatrix(Reader) constructor.
* (FracPete: taken from old weka.core.Matrix class)
*
* @param w the output Writer
* @throws Exception if an error occurs
*/
public void write(Writer w) throws Exception {
w.write("% Rows\tColumns\n");
w.write("" + m_size + "\t" + m_size + "\n");
w.write("% Matrix elements\n");
for(int i = 0; i < m_size; i++) {
for(int j = 0; j < m_size; j++) {
w.write("" + getCell(i, j) + "\t");
}
w.write("\n");
}
w.flush();
}
/**
* converts the Matrix into a single line Matlab string: matrix is enclosed
* by parentheses, rows are separated by semicolon and single cells by
* blanks, e.g., [1 2; 3 4].
* @return the matrix in Matlab single line format
*/
public String toMatlab() {
StringBuffer result;
int i;
int n;
result = new StringBuffer();
result.append("[");
for (i = 0; i < m_size; i++) {
if (i > 0) {
result.append("; ");
}
for (n = 0; n < m_size; n++) {
if (n > 0) {
result.append(" ");
}
result.append(getCell(i, n));
}
}
result.append("]");
return result.toString();
}
/**
* Set the value of a particular cell in the matrix
*
* @param rowIndex the row
* @param columnIndex the column
* @param value the value to set
*/
public final void setCell(int rowIndex, int columnIndex,
Object value) {
m_matrix[rowIndex][columnIndex] = value;
}
/**
* Return the contents of a particular cell. Note: this
* method returns the Object stored at a particular cell.
*
* @param rowIndex the row
* @param columnIndex the column
* @return the value at the cell
*/
public final Object getCell(int rowIndex, int columnIndex) {
return m_matrix[rowIndex][columnIndex];
}
/**
* Return the value of a cell as a double (for legacy code)
*
* @param rowIndex the row
* @param columnIndex the column
* @return the value at a particular cell as a double
* @exception Exception if the value is not a double
*/
public final double getElement(int rowIndex, int columnIndex)
throws Exception {
if (!(m_matrix[rowIndex][columnIndex] instanceof Double)) {
throw new Exception("Cost matrix contains non-fixed costs!");
}
return ((Double)m_matrix[rowIndex][columnIndex]).doubleValue();
}
/**
* Return the value of a cell as a double. Computes the
* value for non-fixed costs using the supplied Instance
*
* @param rowIndex the row
* @param columnIndex the column
* @return the value from a particular cell
* @exception Exception if something goes wrong
*/
public final double getElement(int rowIndex, int columnIndex,
Instance inst) throws Exception {
if (m_matrix[rowIndex][columnIndex] instanceof Double) {
return ((Double)m_matrix[rowIndex][columnIndex]).doubleValue();
} else if (m_matrix[rowIndex][columnIndex] instanceof String) {
replaceStrings();
}
return ((AttributeExpression)m_matrix[rowIndex][columnIndex]).
evaluateExpression(inst);
}
/**
* Set the value of a cell as a double
*
* @param rowIndex the row
* @param columnIndex the column
* @param value the value (double) to set
*/
public final void setElement(int rowIndex, int columnIndex,
double value) {
m_matrix[rowIndex][columnIndex] = new Double(value);
}
/**
* creates a matrix from the given Matlab string.
* @param matlab the matrix in matlab format
* @return the matrix represented by the given string
*/
public static Matrix parseMatlab(String matlab) throws Exception {
return Matrix.parseMatlab(matlab);
}
/**
* Converts a matrix to a string.
* (FracPete: taken from old weka.core.Matrix class)
*
* @return the converted string
*/
public String toString() {
// Determine the width required for the maximum element,
// and check for fractional display requirement.
double maxval = 0;
boolean fractional = false;
Object element = null;
int widthNumber = 0;
int widthExpression = 0;
for (int i = 0; i < size(); i++) {
for (int j = 0; j < size(); j++) {
element = getCell(i, j);
if (element instanceof Double) {
double current = ((Double)element).doubleValue();
if (current < 0)
current *= -11;
if (current > maxval)
maxval = current;
double fract = Math.abs(current - Math.rint(current));
if (!fractional
&& ((Math.log(fract) / Math.log(10)) >= -2)) {
fractional = true;
}
} else {
if (element.toString().length() > widthExpression) {
widthExpression = element.toString().length();
}
}
}
}
if (maxval > 0) {
widthNumber = (int)(Math.log(maxval) / Math.log(10)
+ (fractional ? 4 : 1));
}
int width = (widthNumber > widthExpression)
? widthNumber
: widthExpression;
StringBuffer text = new StringBuffer();
for (int i = 0; i < size(); i++) {
for (int j = 0; j < size(); j++) {
element = getCell(i, j);
if (element instanceof Double) {
text.append(" ").
append(Utils.doubleToString(((Double)element).
doubleValue(),
width, (fractional ? 2 : 0)));
} else {
int diff = width - element.toString().length();
if (diff > 0) {
int left = diff % 2;
left += diff / 2;
String temp = Utils.padLeft(element.toString(),
element.toString().length()+left);
temp = Utils.padRight(temp, width);
text.append(" ").append(temp);
} else {
text.append(" ").
append(element.toString());
}
}
}
text.append("\n");
}
return text.toString();
}
/**
* Returns the revision string.
*
* @return the revision
*/
public String getRevision() {
return RevisionUtils.extract("$Revision: 1.17 $");
}
}
The table below shows all metrics for CostMatrix.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 126.00 | Number of blocks | |
| BLOCK_COMMENT | 22.00 | Number of block comment lines | |
| COMMENTS | 218.00 | Comment lines | |
| COMMENT_DENSITY | 0.57 | Comment density | |
| COMPARISONS | 102.00 | Number of comparison operators | |
| CYCLOMATIC | 124.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 30.00 | Comments in declarations | |
| DOC_COMMENT | 176.00 | Number of javadoc comment lines | |
| ELOC | 385.00 | Effective lines of code | |
| EXEC_COMMENTS | 18.00 | Comments in executable code | |
| EXITS | 50.00 | Procedure exits | |
| FUNCTIONS | 25.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 118.12 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 112.00 | 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 | 1.00 | 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 | 4.00 | 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 | 2.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | 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 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | 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 | 0.00 | 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 | 2.00 | 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 | 1.00 | 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 | 0.00 | 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 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 54.00 | 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 | 1.00 | 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 | 2.00 | 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 | 17.00 | 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 | 1.00 | 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 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | 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 | 809.00 | Number of lines in the source file | |
| LINE_COMMENT | 20.00 | Number of line comments | |
| LOC | 497.00 | Lines of code | |
| LOGICAL_LINES | 270.00 | Number of statements | |
| LOOPS | 34.00 | Number of loops | |
| NEST_DEPTH | 5.00 | Maximum nesting depth | |
| OPERANDS | 1112.00 | Number of operands | |
| OPERATORS | 2371.00 | Number of operators | |
| PARAMS | 27.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 3483.00 | Halstead program length | |
| PROGRAM_VOCAB | 331.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 85.00 | Number of return points from functions | |
| SIZE | 24402.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 273.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 58.00 | Number of unique operators | |
| WHITESPACE | 94.00 | Number of whitespace lines | |