The StringTokenizer 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 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 having the value True or False :
- If the flag is Flase
, 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.
Example without Delimiter:-StringTokenizer st = new StringTokenizer("Example Of String Tokenizer");
while (st.hasMoreTokens()) {
System.out.println(st.nextToken());
}
Output
=====
Example
of
String
Tokenizer
Example with Delimiter:-
StringTokenizer st = new StringTokenizer("1$2$3$4","$");
while (st.hasMoreTokens()) {
System.out.println(st.nextToken());
}
Output
=====
1
2
3
4
