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Commons Lang

Wiki Markup\[http://jakarta.apache.org/commons/lang Lang\] aims to provide:

• Comprehensive String handling utilities
• Enumerated types (pre JDK 1.5)
• Nested exceptions (pre JDK 1.4)
• Builders to create hashCode, equals, toString and compareTo methods
• Utilities for Object, Date and Numbers
  

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The Javadoc of the latest version is \[http://jakarta.apache.org/commons/lang/api/index.html available\](2.1) is available.

The Javadoc of the CVS version (development) is available.

Development plan for 2.

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2

1. Bug fixes
2. StrTokenizer
3. StrBuilder
4. VariableFormatter/interpolator - 18962
   
   

Other ideas

1. Wiki Markup

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1. [21663|http://issues.apache.org/bugzilla/show_bug.cgi?id=

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1. 21663] \[lang\]

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1. Add

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New

1. Wiki Markup
   29673 \[lang\] [ExceptionUtils]: new getCause() methodname (for tomcat-exception) - *Confusing*

2. Wiki Markup
   29692 \[lang\] String indentation feature request - *Needs design as a non-simple problem*

3. 29794 Add convenience format(long) methods to FastDateFormat - Needs improvement
   

Pushed back

1. Wiki Markup21663 \[lang\] Add

   support in [ToStringStyle] for [DateFormat]. - *Grows quickly into commons-convert*

2. Wiki Markup
   [27643|http://issues.apache.org/bugzilla/show_bug.cgi?id=27643] \[lang\]\[patch\] [ClassUtils].newInstance method - *Seems unnecessary*

3. Wiki Markup
   [29149|http://issues.apache.org/bugzilla/show_bug.cgi?id=29149] \[lang\] [StringEscapeUtils].unescapeHtml() doesn't handle an empty entity - *Empty entity is in fact illegal HTML, so need to decide if we should ignore. Current behaviour seems acceptable as we're not in the work with bad HTML market.*

   StringBuffer replacement - Probably 2.2/3.0. A lot of work in this I'd imagine.

4. Wiki Markup
   [26659|http://issues.apache.org/bugzilla/show_bug.cgi?id=26659] \[lang\] add method to [DateUtils] to get the distance between 2 dates - *Mainly replicated by [DurationFormatUtils], or non-obvious*

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(meaning closed in Bugzilla)

2. Wiki Markup

   27592

   [29692|http://issues.apache.org/bugzilla/show_bug.cgi?id=29692] \[lang\] String

   [WordUtils]

   indentation

   capitalize

   feature

   improvement

   request - *

   DONE*23557 WordUtils.capitalizeFully(String str) should take a delimiter - DONE

   Needs design as a non-simple problem*

3. Wiki Markup

   27778

   [22172|http://issues.apache.org/bugzilla/show_bug.cgi?id=22172] \[lang\]

   add remove methods to [ArrayUtils]

   [DateUtils].parseCVS behavior parsing "h:mm z" - *

   DONE*StringTokenizer replacement: (DONE - Tokenizer)

   Moved to sandbox*

4. Wiki Markup

   25227

   [26297|http://issues.apache.org/bugzilla/show_bug.cgi?id=26297] \[lang\] [

   StringEscapeUtils

   BitSetUtils]

   .unescapeHtml() doesn't handle hex entities - *DONE*

   class, toIndexArray and fromIndexArray

5. 21333 Add TimeoutController - Class in HttpClient. Leaving til 3.0 as not much movement on it

6. Wiki Markup

   27640 	\[lang\]\[patch\] [ClassUtils].primitivesToWrappers method - *DONE*

   Wiki Markup22717 \[lang\] [MutableNumbers] - *see lang.mutable.*

   [30674|http://issues.apache.org/bugzilla/show_bug.cgi?id=30674] Support [HttpClient]'s [DateParser] class - *This is basically a Date parseDate(String dateValue, String\[\] dateFormats) method.*

7. LocaleUtils - including toLocale(String,String)
8. CloneUtils - multiple ways to clone an object
   

Articles

This article http://www.devx.com/Java/Article/29392/0/page/6 discusses some of the interesting classes in Commons Lang with real world examples.