How to retrieve the .oamkeystore (OAMStore) password in OAM 11.1.2.3?

It was  easy task for Pre 11.1.2.3 releases to retrieve the .oamkeystore (OAMStore) password. The steps are following for retrieving .oamkeystore (OAMStore) password:

1. Invoke the wlst command shell.
2. Execute connect() command.
3. Once connected, listCred(map="OAM_STORE", key="jks"). 

For OAM 11.1.2.3 onward, the support of listCred () wlst command is not available. Now, you have to retrieve the .oamkeystore (OAMStore) password programmatically. You can refer following sample code. The compile and execute instructions.