In Java source code: package a.b.c;
means sources are in $SOURCEPATH/a/b/c/*.java
and classes in $CLASSPATH/a/b/c/*.class

javac -sourcepath SOURCEPATH -classpath CLASSPATH -d CLASSES

reads sources from SOURCEPATH/a/b/c, classes from CLASSPATH/a/b/c, writes to CLASSES/a/b/c
Pack package xxx (xxx must be top directory in jar file):

jar -cf xxx.jar xxx/*.class

JAVA_HOME points to directory of include, lib, jre
JDK_INCLUDE is then $JAVA_HOME/include.

-- HansEssel - 07 Jan 2010