Regular Expressions in Java

Package com.stevenrbrandt.ubiq2.v15.pattwo

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Welcome

Package Pattwo (updated 05/22/2009): Package pattwo is a new, from scratch, regular expression implementation that conforms (mostly) to the interface established by java.util.regex.
Some differences include:

No stack overflows or out of memory errors. Ever. In fact, you could use it in a MIDlet.
No backwards searches, i.e. (?<=X), (?<!X)
No && inside entities, e.g. [[abc]&&[def]]. Only simple perl-type entity descriptions.
Matcher can take a Reader object.
Package name. To use it, replace "import java.util.regex.*" with "import com.stevenrbrandt.ubiq2.v15.pattwo.*".

Downloads:

pattwo-bin-v15.jar Compiled with java 1.6.
pattwo-doc-v15.zip Presently the java docs contain very little description. Since the package conforms fairly closely to java.util.regex this should not be a problem.
pattwo-src-v15.zip The Source code.

Brief Release Notes:

v15: Fixed a bug with \Q ... \E
v14: Target & runtime library compatible with Java 1.3.
v13: Encapsulated references to Hashtable and Vector, making it easy for a user to replace with ArrayList or HashMap.
v12: Converted sources to be compatible with version 1.2
v11: Fixed bug parsing \1 type patterns.
v10: Fixed some transparent boundary issues.
v9: added support for transparent bounds and made some bug fixes.
v8: Fixed an issue with hitEnd().
v7: Fixed various issues with $ and ^.
v6:
1. added useAnchoringBounds() / hasAnchoringBounds()
2. fixed a bug relating to the [,\s] pattern and those like it.
v5:
1. Made hitEnd() work properly.
2. Added regions.
3. Bug fixes that affected patterns using alternations on group 0.
v4: Many bug fixes relating to patterns similar to (a*)*, [-a], [a-].
v1: Initail release