How to call a Method in a Program?

Hello,
I am very new to the ABAP world. I have been given a task to call a method if_hrbas_plain_infotype_access~read_single from the class CL_HRBAS_PLAIN_INFOTYPE_ACCESS in a program to see if we can use it to display some employee information. I don't know how to call a method in a program. Can somebody please provide me some pseudo code or instructions?
Thanks.

Hi Shan,
here is the code to call a method. while calling the method Instance as 'r_info' which is the type reference to class as specified.
pass the values to exporting parameters plvar,otype,objid...etc according to the requirement
infotypes: 0002.   " creates an internal table p0002.
data:
r_info type ref to CL_HRBAS_PLAIN_INFOTYPE_ACCESS.
TRY.
CALL METHOD r_info->if_hrbas_plain_infotype_access~read
   EXPORTING
     plvar           =
     otype           =
     objid           =
     istat           =
     infty           =
*     SUBTY           =
     begda           =
     endda           =
     no_auth_check   = 'X'
     message_handler =
   IMPORTING
     PNNNN_TAB       = P0002
*     HRTNNNN_TAB     =
*     IS_OK           =
CATCH CX_HRBAS_VIOLATED_ASSERTION .
ENDTRY.
LOOP AT P0002.
      WRITE:/
        P0002-VORNA,
        P0002-NCHMC,
        P0002-NACHN.
    ENDLOOP.
Regards

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Hello,
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fileExit_actionPerformed(null);
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