The following commands doesn't lead sigtest to fail due to incorrect parameters:

java -jar sigtestdev.jar Test AAAAAA -classpath /usr/lib/jvm/java-8-oracle/jre/lib/rt.jar -filename 1.sig -Package com.test

or

java -jar sigtestdev.jar Test -classpath /usr/lib/jvm/java-8-oracle/jre/lib/rt.jar -filename 1.sig -Package com.test AAAAAA

If we insert AAAAAA after classpath or filename, sigtest fails due to "Too many parameters specified" for the concrete option.