[kaffe] [Problem]cannot find String [JLS 8]

hi,
i'm new to kaffe and encounter a problem when
compiling the program. orginally it issues the "cannot
find ... class String ..[JLS 8]". after  rt.jar
included, located in $KAFFE_HOME/jre/lib/rt.jar, it's
been solved. however, the way i do it is through
command 'javac -classpath "./:/path/to/rt.jar"
MyProgram.java'.
else if i do not include rt.jar. the problem sketched
above issued again. would any one be able to tell men
where i did is wrong? 
i appreciate any suggestions, 
thank you very much.
Arsene

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