static public void main ( String [ ] args ) {
  String str = "geeksforgeeks" ;
  int pos = findRepeatFirstN2 ( str ) ;
  if ( pos == - 1 ) System . out . println ( "Not found" ) ;
  else System . out . println ( str . charAt ( pos ) ) ;
}

static public void main ( String [ ] args ) { String str = " geeksforgeeks " ; int pos = findRepeatFirstN2 ( str ) ; if ( pos == - 1 ) System . out . println ( " Not ▁ found " ) ; else System . out . println ( str . charAt ( pos ) ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation name: (identifier) arguments: (argument_list (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (unary_expression operand: (decimal_integer_literal)))) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) alternative: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))))))