How to Use the StringTokenizer Class in JAVA

StringTokenizer class

 

The StringTokenizer class allows us to break a string into tokens. The StringTokenizer method does not distinguish among the identifiers quoted string, numbers, skip comment; and the StringTokenizer class implements the Enumeration interfaceTo use a StringTokenizer that you specify in an input String which contains delimiters.

 

Delimiters are nothing but only characters that separate tokens, for example, comma (,) colon(:) semicolon(;). The default delimiters are the whitespace characters space, tab, newline, and carriage return.

 

To read about Strings in Java pls click 

 

Constructor of StringTokenizer class

 

1. StringTokenizer(String object):

 

Constructs a string tokenizer for the specified string. It takes a default delimiter.

 

2. StringTokenizer(String object, String delimiters):

 

In this constructor, you can pass a delimiter according to need int form of string as a second argument.

 

3. StringTokenizer(String object, String delimiters, boolean deliasktoken):

 

This constructor has the same arguments except a boolean deliasktoken is an extra argument; this argument means if it's True then the delimiter character is also returned with the token.

 

Methods of the StringTokenizer class

 

1. int countTokens():

Calculates the number of times that this tokenizer's nextToken method can be called before it generates an exception.

 

2. boolean hasMoreTokens():

 

Tests if there are more tokens available from this tokenizer's string.

 

3. boolean hasMoreElements()

 

Returns the same value as the hasMoreTokens method.

 

4. String nextToken():

 

Returns the next token from this string tokenizer.

 

5. Object nextElement():

 

Returns the same value as the nextToken method, except that its declared return value is an Object rather than a String.

 

6. String nextToken(String delim):

 

Returns the next token in this string tokenizer's string.

 

Program

import java .io.*;
import java.util.*;
class MyStringTokenizer
{
    public static void main(String arg[])throws IOException
    {
         String s="this ,is, the, example, of, StirgTokenizer";
         /* creating the object of stringTokenizer Class by passing the object string type s and second object passing as delimeter */
         StringTokenizer st=new StringTokenizer(s,",");
         /* hasMoreTokens() using for printing the return token it return the value true */
         while(st.hasMoreTokens())
        {
            System.out.println(st.nextToken());
        }
    }
}

Output

 

 

Summary

 

The StringTokenizer class helps to break a string object into tokens as determined by the delimiter passed into the parameter, which works as a separator you can make your own delimiter and if you do not specify a delimiter then it uses default delimiters.