Added in API level 1

StringTokenizer

open class StringTokenizer : Enumeration<Any!>

kotlin.Any
↳	java.util.StringTokenizer

The string tokenizer class allows an application to break a string into tokens. The tokenization method is much simpler than the one used by the StreamTokenizer class. The StringTokenizer methods do not distinguish among identifiers, numbers, and quoted strings, nor do they recognize and skip comments.

The set of delimiters (the characters that separate tokens) may be specified either at creation time or on a per-token basis.

An instance of StringTokenizer behaves in one of two ways, depending on whether it was created with the returnDelims flag having the value true or false:

• If the flag is false, delimiter characters serve to separate tokens. A token is a maximal sequence of consecutive characters that are not delimiters.
• If the flag is true, delimiter characters are themselves considered to be tokens. A token is thus either one delimiter character, or a maximal sequence of consecutive characters that are not delimiters.

A StringTokenizer object internally maintains a current position within the string to be tokenized. Some operations advance this current position past the characters processed.

A token is returned by taking a substring of the string that was used to create the StringTokenizer object.

The following is one example of the use of the tokenizer. The code:

StringTokenizer st = new StringTokenizer("this is a test");
      while (st.hasMoreTokens()) {
          System.out.println(st.nextToken());
      }
  

prints the following output:

this
      is
      a
      test
  

StringTokenizer is a legacy class that is retained for compatibility reasons although its use is discouraged in new code. It is recommended that anyone seeking this functionality use the split method of String or the java.util.regex package instead.

The following example illustrates how the String.split method can be used to break up a string into its basic tokens:

String[] result = "this is a test".split("\\s");
      for (int x=0; x<result.length; x++)
          System.out.println(result[x]);
  

prints the following output:

this
      is
      a
      test
  

Summary

Public constructors
StringTokenizer(str: String!) Constructs a string tokenizer for the specified string.
StringTokenizer(str: String!, delim: String!) Constructs a string tokenizer for the specified string.
StringTokenizer(str: String!, delim: String!, returnDelims: Boolean) Constructs a string tokenizer for the specified string.

Public methods
open Int	countTokens() Calculates the number of times that this tokenizer's nextToken method can be called before it generates an exception.
open Boolean	hasMoreElements() Returns the same value as the hasMoreTokens method.
open Boolean	hasMoreTokens() Tests if there are more tokens available from this tokenizer's string.
open Any!	nextElement() Returns the same value as the nextToken method, except that its declared return value is Object rather than String.
open String!	nextToken() Returns the next token from this string tokenizer.
open String!	nextToken(delim: String!) Returns the next token in this string tokenizer's string.

Inherited functions
From class Enumeration MutableIterator<E>! asIterator() Returns an Iterator that traverses the remaining elements covered by this enumeration. Traversal is undefined if any methods are called on this enumeration after the call to asIterator.

Public constructors

StringTokenizer

Added in API level 1

StringTokenizer(str: String!)

Constructs a string tokenizer for the specified string. The tokenizer uses the default delimiter set, which is " \t\n\r\f": the space character, the tab character, the newline character, the carriage-return character, and the form-feed character. Delimiter characters themselves will not be treated as tokens.

Parameters
str	String!: a string to be parsed.

Exceptions
java.lang.NullPointerException	if str is null

StringTokenizer

Added in API level 1

StringTokenizer(
    str: String!, 
    delim: String!)

Constructs a string tokenizer for the specified string. The characters in the delim argument are the delimiters for separating tokens. Delimiter characters themselves will not be treated as tokens.

Note that if delim is null, this constructor does not throw an exception. However, trying to invoke other methods on the resulting StringTokenizer may result in a NullPointerException.

Parameters
str	String!: a string to be parsed.
delim	String!: the delimiters.

Exceptions
java.lang.NullPointerException	if str is null

StringTokenizer

Added in API level 1

StringTokenizer(
    str: String!, 
    delim: String!, 
    returnDelims: Boolean)

Constructs a string tokenizer for the specified string. All characters in the delim argument are the delimiters for separating tokens.

If the returnDelims flag is true, then the delimiter characters are also returned as tokens. Each delimiter is returned as a string of length one. If the flag is false, the delimiter characters are skipped and only serve as separators between tokens.

Note that if delim is null, this constructor does not throw an exception. However, trying to invoke other methods on the resulting StringTokenizer may result in a NullPointerException.

Parameters
str	String!: a string to be parsed.
delim	String!: the delimiters.
returnDelims	Boolean: flag indicating whether to return the delimiters as tokens.

Exceptions
java.lang.NullPointerException	if str is null

Public methods

countTokens

Added in API level 1

open fun countTokens(): Int

Calculates the number of times that this tokenizer's nextToken method can be called before it generates an exception. The current position is not advanced.

Return
Int	the number of tokens remaining in the string using the current delimiter set.

See Also

• java.util.StringTokenizer#nextToken()

hasMoreElements

Added in API level 1

open fun hasMoreElements(): Boolean

Returns the same value as the hasMoreTokens method. It exists so that this class can implement the Enumeration interface.

Return
Boolean	true if there are more tokens; false otherwise.

See Also

• java.util.Enumeration
• java.util.StringTokenizer#hasMoreTokens()

hasMoreTokens

Added in API level 1

open fun hasMoreTokens(): Boolean

Tests if there are more tokens available from this tokenizer's string. If this method returns true, then a subsequent call to nextToken with no argument will successfully return a token.

Return
Boolean	true if and only if there is at least one token in the string after the current position; false otherwise.

nextElement

Added in API level 1

open fun nextElement(): Any!

Returns the same value as the nextToken method, except that its declared return value is Object rather than String. It exists so that this class can implement the Enumeration interface.

Return
Any!	the next token in the string.

Exceptions
java.util.NoSuchElementException	if there are no more tokens in this tokenizer's string.

See Also

• java.util.Enumeration
• java.util.StringTokenizer#nextToken()

nextToken

Added in API level 1

open fun nextToken(): String!

Returns the next token from this string tokenizer.

Return
String!	the next token from this string tokenizer.

Exceptions
java.util.NoSuchElementException	if there are no more tokens in this tokenizer's string.

nextToken

Added in API level 1

open fun nextToken(delim: String!): String!

Returns the next token in this string tokenizer's string. First, the set of characters considered to be delimiters by this StringTokenizer object is changed to be the characters in the string delim. Then the next token in the string after the current position is returned. The current position is advanced beyond the recognized token. The new delimiter set remains the default after this call.

Parameters
delim	String!: the new delimiters.

Return
String!	the next token, after switching to the new delimiter set.

Exceptions
java.util.NoSuchElementException	if there are no more tokens in this tokenizer's string.
java.lang.NullPointerException	if delim is null