Java APIs

ok so when i run my build (thats all that it says btw) i get this pretty little thing

note:some input files use unchecked or unsafe operations
note:recompile with -xlint:unchecked for details

ive done my fair share of looking into this to fix but i cant seem to get by it..
for the main reason im trying to make a rsps (runescape private server)
and when people give codes to fix...i cant use them because when i go to edit my "build"
this is all that is there

@echo off
"C:\Program Files\Java\jdk1.6.0_16\bin\javac.exe" ./files/*.java
pause

so yeah....
anyone lend a helping hand?