By trying to setup System Vars for JAVA in vista I deleted the

System Vars

By trying to setup System Vars for JAVA in vista I deleted the
PATH
CLASSPATH
JAVA_HOME
well when deleted are recreated to defaults ? If not what to assign to them for
VISTA HOME PREMIUM SP1 32BIT VER.6.0(BUILD 6001:SP1) 2007
JAVA ver.6 update 13 (build 1.6.0_13-b03) 2009

see attachment