static void reverseWords ( String str ) {
  Stack < Character > st = new Stack < Character > ( ) ;
  for ( int i = 0 ;
  i < str . length ( ) ;
  ++ i ) {
    if ( str . charAt ( i ) != ' ' ) st . push ( str . charAt ( i ) ) ;
    else {
      while ( st . empty ( ) == false ) {
        System . out . print ( st . pop ( ) ) ;
      }
      System . out . print ( " " ) ;
    }
  }
  while ( st . empty ( ) == false ) {
    System . out . print ( st . pop ( ) ) ;
  }
}

static void reverseWords ( String str ) { Stack < Character > st = new Stack < Character > ( ) ; for ( int i = 0 ; i < str . length ( ) ; ++ i ) { if ( str . charAt ( i ) != ' ▁ ' ) st . push ( str . charAt ( i ) ) ; else { while ( st . empty ( ) == false ) { System . out . print ( st . pop ( ) ) ; } System . out . print ( " ▁ " ) ; } } while ( st . empty ( ) == false ) { System . out . print ( st . pop ( ) ) ; } }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments (type_identifier))) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) alternative: (block (while_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (false))) body: (block (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))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))))))) (while_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (false))) body: (block (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)))))))))