When i need to compile i used BPXBATCH as follow :
//JCOMP EXEC PGM=BPXBATCH,
// PARM='sh javac -d /u/einsarg/testjava/classes
// /u/einsarg/testjava/src/sample01.java'

I tried the following, but doesn't work as i guess JZOS cannot execute shell commands :
//JAVA EXEC PROC=JVMPRC14,
// JAVACLS='javac'
//STDENV DD *
. /etc/profile
//MAINARGS DD *
-d /u/einsarg/testjava/classes
/u/einsarg/testjava/src/sample01.java'