Can we call Plain JAVA Code online via MDM Cient

Hi SDNers,
For some validation purpose i need to write a JAVA Code(Some body told me that it can be possible i.e we can Java Code for doing Validation)
i have two Questions.
1. Can we call JAVA Code online via MDM Client.
2. where i have to write this JAVA Code and what will be steps of writing this Code.
Thanx in Advance.

Hi Tanveer,
Thanx a lot for ur prompt reply
Pls reply my this Question also promptly i will be highly thankful for it.
Q.
My Requirment is i have to do the validation
"on the basis of acct grp i have to put validation
      a. the G/L acct must be in particular range.
      b. it must have specific length"
My sr. developer is saying simply putting the IF ELSE condition in the validation Editor technique 'ld be hard to maintain at later stage as we large number of Acct Grps.
He is saying look for some Custom function for it
"SO TELL ME CLEARLY THAT
                                               --CAN I USE JAVA API FOR THIS
                                               --AS A EXP. MDM CONSULTANT WILL U
                                                  RECOMMEND IT?
                                               --IF YES
                                                 THEN
                                                      WHAT 'LD BE EXACT STEPS.
                                             ---IF NO
                                                THEN
                                                     WHAT ARE THE OTHERS WAYS
                                                     i.e
                                                     IF U R FACING THIS PROBLEM THEN WAT
                                                     SOLN U R GOING TO USE?
PLS
REPLY ASAP as per the exact question(i.e all parts of Q)
i will highly thank for u.
Regards
kuldeep

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