Java mapping : to remove "&" from payload.

hi experts,
Am new to XI. i need help.
i have a payload wich has several "&"s in it. i need to write a piece of java code in NWDS that can remove this "&".
this code will be uploaded as java mapping. next i will subject this payload to graphical mapping to meet the desired logical requirement. once the requirement is fulfilled again i need to restore the "&"s at their original palce. there can be several "&"s present in the payload.
java mapping----
will remove "&"s
graphical mapping-----will do the necessary logical transformations
java mapping----
will restore the "&"s in their original positions.
kindly help.
please revert back if you need any additional information.

I see you want consecutive mappings here
1)Java Mapping (Remove special chars)
2) MM
3) Java Mapping (Restore special chars) Dont know why?
For the first step you can use the given link by shabarish and in third step again you have to write logic to insert those special characters in your data elements. This is not an elegant approach. You are going to run into high maintanence.
Suggestion: Try to filter the special characters from the sender side itself. If you dont get any option then go for the above ways.

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