void function ( String arg0 ) { if ( arg0 != null && arg0 . length ( ) > 0 ) { System . arg0 . println ( "srini_string" + arg0 ) ; } System . arg0 . println ( "srini_string" ) ; System . exit ( 1 ) ; }
prints out usage information , with optional error message concode_field_sep PlaceHolder placeHolder concode_field_sep void main