public static void main ( String args [ ] ) throws IOException {
  Stringfun obj = new Stringfun ( ) ;
  obj . words ( ) ;
  obj . frequency ( ) ;
}

public static void main ( String args [ ] ) throws IOException { Stringfun obj = new Stringfun ( ) ; obj . words ( ) ; obj . frequency ( ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))