Description: The best parser code, but a form of class files, you can decompile and quickly take a look at it
File list (Check if you may need any files):
lucene-2.4.0
............\BUILD.txt
............\build.xml
............\CHANGES.txt
............\contrib
............\.......\analyzers
............\.......\.........\lucene-analyzers-2.4.0-javadoc.jar
............\.......\.........\lucene-analyzers-2.4.0.jar
............\.......\ant
............\.......\...\lucene-ant-2.4.0-javadoc.jar
............\.......\...\lucene-ant-2.4.0.jar
............\.......\benchmark
............\.......\.........\CHANGES.txt
............\.......\.........\lucene-benchmark-2.4.0-javadoc.jar
............\.......\.........\lucene-benchmark-2.4.0.jar
............\.......\.........\README.enwiki
............\.......\CHANGES.txt
............\.......\highlighter
............\.......\...........\lucene-highlighter-2.4.0-javadoc.jar
............\.......\...........\lucene-highlighter-2.4.0.jar
............\.......\instantiated
............\.......\............\lucene-instantiated-2.4.0-javadoc.jar
............\.......\............\lucene-instantiated-2.4.0.jar
............\.......\lucli
............\.......\.....\lucene-lucli-2.4.0-javadoc.jar
............\.......\.....\lucene-lucli-2.4.0.jar
............\.......\.....\README
............\.......\memory
............\.......\......\lucene-memory-2.4.0-javadoc.jar
............\.......\......\lucene-memory-2.4.0.jar
............\.......\misc
............\.......\....\lucene-misc-2.4.0-javadoc.jar
............\.......\....\lucene-misc-2.4.0.jar
............\.......\miscellaneous
............\.......\.............\README.txt
............\.......\queries
............\.......\.......\lucene-queries-2.4.0-javadoc.jar
............\.......\.......\lucene-queries-2.4.0.jar
............\.......\.......\README.txt
............\.......\regex
............\.......\.....\lucene-regex-2.4.0-javadoc.jar
............\.......\.....\lucene-regex-2.4.0.jar
............\.......\similarity
............\.......\..........\lucene-similarity-2.4.0.jar
............\.......\..........\README.txt
............\.......\snowball
............\.......\........\lucene-snowball-2.4.0-javadoc.jar
............\.......\........\lucene-snowball-2.4.0.jar
............\.......\........\README.txt
............\.......\spellchecker
............\.......\............\lucene-spellchecker-2.4.0-javadoc.jar
............\.......\............\lucene-spellchecker-2.4.0.jar
............\.......\surround
............\.......\........\lucene-surround-2.4.0-javadoc.jar
............\.......\........\lucene-surround-2.4.0.jar
............\.......\........\README.txt
............\.......\swing
............\.......\.....\lucene-swing-2.4.0-javadoc.jar
............\.......\.....\lucene-swing-2.4.0.jar
............\.......\wikipedia
............\.......\.........\lucene-wikipedia-2.4.0-javadoc.jar
............\.......\.........\lucene-wikipedia-2.4.0.jar
............\.......\wordnet
............\.......\.......\lucene-wordnet-2.4.0-javadoc.jar
............\.......\.......\lucene-wordnet-2.4.0.jar
............\.......\.......\README.txt
............\.......\xml-query-parser
............\.......\................\lucene-xml-query-parser-2.4.0-javadoc.jar
............\.......\................\lucene-xml-query-parser-2.4.0.jar
............\.......\................\README.htm
............\docs
............\....\api
............\....\...\allclasses-frame.html
............\....\...\allclasses-noframe.html
............\....\...\com
............\....\...\...\sleepycat
............\....\...\...\.........\db
............\....\...\...\.........\..\class-use
............\....\...\...\.........\..\.........\DbHandleExtractor.html
............\....\...\...\.........\..\DbHandleExtractor.html
............\....\...\...\.........\..\package-frame.html
............\....\...\...\.........\..\package-summary.html
............\....\...\...\.........\..\package-tree.html
............\....\...\...\.........\..\package-use.html
............\....\...\constant-values.html
............\....\...\contrib-analyzers
............\....\...\.................\allclasses-frame.html
............\....\...\.................\allclasses-noframe.html
.....