properties - CLASSPATH vs java.ext.dirs -


is there reason why favor using (possibly long) classpath variable set jars should on classpath durign application run use java 1.5+ property -djava.ext.dirs specifies whole directory(directories) of jars searched?

to make real-life example have standalone java application lib folder containig dependent jars. sofar start script setting (maybe 20) jars classpath variable 1 one. since application archive generated maven can't see in advance jar names (e.g. change version of jar). of course can go through lib dir in startup script , add jars found there classpath variable again. or make maven generate script me. here comes quiestions:

1) ok , appropriate replace of setting java.ext.dirs property contain contains + lib dir in script? caveats hidden there?

thanks replies :)

java.ext.dirs has specific use: it's used specify extension mechanism loads classes from. used add functionality jre or other libraries (such jai). it's not meant general-purpose class-loading mechanism.

use wildcard character * instead. introduced in java 6, many people still don't know it's possible.


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