org.apache.commons.lang

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Java Source Code / Java Documentation » Open Source Library » Apache common lang » org.apache.commons.lang   org.apache.commons.lang Provides highly reusable static utility methods, chiefly concerned with adding value to {@link java.lang} and other standard core classes. @since 1.0 Java Source File Name Type Comment AllLangTestSuite.java Class Test suite for [lang]. ArrayUtils.java Class Operations on arrays, primitive arrays (like int[]) and primitive wrapper arrays (like Integer[]). This class tries to handle null input gracefully. An exception will not be thrown for a null array input. ArrayUtilsAddTest.java Class Tests ArrayUtils add methods. author:    Gary D. ArrayUtilsRemoveTest.java Class Tests ArrayUtils remove and removeElement methods. ArrayUtilsTest.java Class Unit tests org.apache.commons.lang.ArrayUtils . BitField.java Class Operations on bit-mapped fields. author:    Apache Jakarta POI author:    Scott Sanders (sanders at apache dot org) author:    Marc Johnson (mjohnson at apache dot org) author:    Andrew C. BitFieldTest.java Class BooleanUtils.java Class Operations on boolean primitives and Boolean objects. This class tries to handle null input gracefully. BooleanUtilsTest.java Class Unit tests org.apache.commons.lang.BooleanUtils . CharEncoding.java Class Character encoding names required of every implementation of the Java platform. According to JRE character encoding names: Every implementation of the Java platform is required to support the following character encodings. CharEncodingTest.java Class Tests CharEncoding. See Also:   CharEncoding author:    Gary D. CharRange.java Class CharRangeTest.java Class Unit tests org.apache.commons.lang.CharRange . CharSet.java Class CharSetTest.java Class Unit tests org.apache.commons.lang.CharSet . CharSetUtils.java Class Operations on CharSets. This class handles null input gracefully. CharSetUtilsTest.java Class Unit tests org.apache.commons.lang.CharSetUtils . author:    Ringo De Smet author:    Stephen Colebourne author:    Gary D. CharUtils.java Class Operations on char primitives and Character objects. This class tries to handle null input gracefully. CharUtilsPerfTest.java Class Tests the difference in performance between CharUtils and CharSet. Sample runs: Now: Thu Mar 18 14:29:48 PST 2004 Sun Microsystems Inc. CharUtilsTest.java Class Unit tests org.apache.commons.lang.CharUtils . ClassUtils.java Class Operates on classes without using reflection. This class handles invalid null inputs as best it can. ClassUtilsTest.java Class Unit tests org.apache.commons.lang.ClassUtils . author:    Stephen Colebourne author:    Gary D. Entities.java Class Provides HTML and XML entity utilities. EntitiesPerformanceTest.java Class EntitiesTest.java Class Unit tests for StringEscapeUtils . IllegalClassException.java Class Thrown when an object is an instance of an unexpected type (a class or interface). This exception supplements the standard IllegalArgumentException by providing a more semantically rich description of the problem. IllegalClassException represents the case where a method takes in a genericly typed parameter like Object (typically because it has to due to some other interface it implements), but this implementation only actually accepts a specific type, for example String. IllegalClassExceptionTest.java Class JUnit tests. IncompleteArgumentException.java Class Thrown to indicate an incomplete argument to a method. IncompleteArgumentExceptionTest.java Class JUnit tests. IntHashMap.java Class A hash map that uses primitive ints for the key rather than objects. Note that this class is for internal optimization purposes only, and may not be supported in future releases of Jakarta Commons Lang. IntHashMapTest.java Class Tests for the IntHashMap class. LangTestSuite.java Class Test suite for the Lang package. LocaleUtils.java Class Operations to assist when working with a Locale . This class tries to handle null input gracefully. LocaleUtilsTest.java Class Unit tests for LocaleUtils . NotImplementedException.java Class Thrown to indicate that a block of code has not been implemented. NotImplementedExceptionTest.java Class JUnit tests. NullArgumentException.java Class Thrown to indicate that an argument was null and should not have been. NullArgumentExceptionTest.java Class JUnit tests. NumberRange.java Class Represents a range of Number objects. This class uses double comparisons. NumberRangeTest.java Class Test cases for the NumberRange class. NumberUtils.java Class NumberUtilsTest.java Class Unit tests org.apache.commons.lang.NumberUtils . ObjectUtils.java Class Operations on Object. This class tries to handle null input gracefully. An exception will generally not be thrown for a null input. Each method documents its behaviour in more detail. author:    Nissim Karpenstein author:    Janek Bogucki author:    Daniel Rall author:    Stephen Colebourne author:    Gary Gregory author:    Mario Winterer author:    David J. ObjectUtilsTest.java Class Unit tests org.apache.commons.lang.ObjectUtils . RandomStringUtils.java Class Operations for random Strings. Currently private high surrogate characters are ignored. RandomStringUtilsTest.java Class Unit tests org.apache.commons.lang.RandomStringUtils . SerializationException.java Class SerializationUtils.java Class Assists with the serialization process and performs additional functionality based on serialization. Deep clone using serialization Serialize managing finally and IOException Deserialize managing finally and IOException This class throws exceptions for invalid null inputs. SerializationUtilsTest.java Class Unit tests org.apache.commons.lang.SerializationUtils . StringEscapeUtils.java Class StringEscapeUtilsTest.java Class Unit tests for StringEscapeUtils . StringUtils.java Class Operations on java.lang.String that are null safe. IsEmpty/IsBlank - checks if a String contains text Trim/Strip - removes leading and trailing whitespace Equals - compares two strings null-safe IndexOf/LastIndexOf/Contains - null-safe index-of checks IndexOfAny/LastIndexOfAny/IndexOfAnyBut/LastIndexOfAnyBut - index-of any of a set of Strings ContainsOnly/ContainsNone - does String contains only/none of these characters Substring/Left/Right/Mid - null-safe substring extractions SubstringBefore/SubstringAfter/SubstringBetween - substring extraction relative to other strings Split/Join - splits a String into an array of substrings and vice versa Remove/Delete - removes part of a String Replace/Overlay - Searches a String and replaces one String with another Chomp/Chop - removes the last part of a String LeftPad/RightPad/Center/Repeat - pads a String UpperCase/LowerCase/SwapCase/Capitalize/Uncapitalize - changes the case of a String CountMatches - counts the number of occurrences of one String in another IsAlpha/IsNumeric/IsWhitespace/IsAsciiPrintable - checks the characters in a String DefaultString - protects against a null input String Reverse/ReverseDelimited - reverses a String Abbreviate - abbreviates a string using ellipsis Difference - compares two Strings and reports on their differences LevensteinDistance - the number of changes needed to change one String into another The StringUtils class defines certain words related to String handling. null - null empty - a zero-length string ("") space - the space character (' ', char 32) whitespace - the characters defined by Character.isWhitespace(char) trim - the characters <= 32 as in String.trim StringUtils handles null input Strings quietly. That is to say that a null input will return null. Where a boolean or int is being returned details vary by method. A side effect of the null handling is that a NullPointerException should be considered a bug in StringUtils (except for deprecated methods). Methods in this class give sample code to explain their operation. The symbol * is used to indicate any input including null. See Also:   java.lang.String author:    Apache Jakarta Turbine author:    Jon S. StringUtilsEqualsIndexOfTest.java Class StringUtilsIsTest.java Class StringUtilsSubstringTest.java Class StringUtilsTest.java Class Unit tests org.apache.commons.lang.StringUtils . author:    Daniel Rall author:    Stephen Colebourne author:    Ringo De Smet author:    Henning P. StringUtilsTrimEmptyTest.java Class SystemUtils.java Class SystemUtilsTest.java Class Unit tests org.apache.commons.lang.SystemUtils . Only limited testing can be performed. author:    Stephen Colebourne author:    Tetsuya Kaneuchi author:    Gary D. UnhandledException.java Class Thrown when it is impossible or undesirable to consume or throw a checked exception. This exception supplements the standard exception classes by providing a more semantically rich description of the problem. UnhandledException represents the case where a method has to deal with a checked exception but does not wish to. UnhandledExceptionTest.java Class JUnit tests. Validate.java Class Assists in validating arguments. The class is based along the lines of JUnit. ValidateTest.java Class Unit tests org.apache.commons.lang.util.Validate . WordUtils.java Class Operations on Strings that contain words. This class tries to handle null input gracefully. An exception will not be thrown for a null input. Each method documents its behaviour in more detail. author:    Apache Jakarta Velocity author:    Stephen Colebourne author:    Henning P. WordUtilsTest.java Class Unit tests for WordUtils class.

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