1. Change path to ur cur dir using "cd" command
2. set classpath to all lib files  & dont forgot to
add ur cur dir also "."

set classpath=%classpath%;.;
(or)
set classpath=%classpath%;C:\java\KnowledgeBase;

use the following syntax to compile  & run

syntax:
javac -d <dir_name> <source_name.java>
ex:
javac -d C:\java\KnowledgeBase *.java

syntax:
java <package>.<class_name>
ex:
java knowledgebase.KnowledgeBase