private static String read ( ) {
  if ( buffer == null || ! buffer . hasMoreTokens ( ) ) {
    buffer = new StringTokenizer ( readLine ( ) ) ;
  }
  return buffer . nextToken ( ) ;
}

private static String read ( ) { if ( buffer == null || ! buffer . hasMoreTokens ( ) ) { buffer = new StringTokenizer ( readLine ( ) ) ; } return buffer . nextToken ( ) ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (null_literal)) right: (unary_expression operand: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (object_creation_expression type: (type_identifier) arguments: (argument_list (method_invocation name: (identifier) arguments: (argument_list)))))))) (return_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))