I am using the Eclipse JDT to build/run liferay for hot deployment & debugging according to those steps:
Suddenley after restarting my Ubuntu VM after installing Updates the import of javax.crypto fails.
I googled a lot but no real solution by now. Meanwhile I can build after adding jce.jar to my jdks external jars (Eclipse-Window-Prefernces-Installed JREs - Select JRE - Edit - Add External Jars)
This helps for Building but not when launching from the Debugger
???
After starting eclipse with the -clean flag in the eclipse.ini everything runs fine again.
I further noticed, that the Restore Defaults button in Preferences -> Java > ... -> Edit JRE now adds a lot more jars than before.
It now consists of the following jars - but adding them by hand did not help:
jre/lib/rt.jar
jre/lib/jsse.jar
jre/lib/jce.jar
jre/lib/charset.jar
jre/lib/ext/dnsns.jar
jre/lib/ext/sunpkcs11.jar
jre/lib/ext/sunjce_provider.jar
jre/lib/ext/localedata.jar
Using JDK 1.5 here