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Following warning asks module developers to remove dependency on Apache's RE package. [org.netbeans.core.modules #6] Warning: the module org.netbeans.modules.i18n uses org.netbeans.libs.regexp which is deprecated: JDK 1.4 includes regular expression support which should be used instead: http://www.netbeans.org/download/dev/javadoc/OpenAPIs/org/openide/doc-files/upgrade.html#4.0-jre-regexp (5:20)
Affects IDE startup
Note that this is the last module remaining with a dep on the regexp lib. Once this issue is fixed, the libs/regexp module can be removed from the build (placed on stable AU I guess).
Fixed in the trunk. Two two Apache's RE non standard POSIX-like character classes [:javastart:] and [:javapart:] are no longer supported.
verified
Proposed relnote (to be put in the Changes section, not the Known Issues section): Apache's regular expression library is no longer is included in the IDE. The IDE now uses java.util.regex package for regular expression support.
Issue #40598 is I think what you are interested in; and it has not yet been done for 3.6 (TBD whether it will be). I am not sure whether this is appropriate RELNOTE material anyway; mostly an internal issue. Only applies to the user insofar as the syntax of obscure regexp constructions (that few people would even know about) has changed for e.g. the JAR packager file filter.
I agree with Jesse. The user need not know about changes of implementation. Just syntax changes should be pointed out. In module I18N, the only syntax change is that [:javastart:] and [:javapart:] are no longer accepted. Otherwise, the syntax remained unchanged.