When
a StringTokenizer is instantiated with a
String, it breaks the string up into tokens
separated by any of the characters in the specified string of
delimiters. (For example, words separated by space and tab characters
are tokens.) The hasMoreTokens( ) and
nextToken( ) methods obtain the tokens in order.
countTokens( ) returns the number of tokens in the
string. StringTokenizer implements the
Enumeration interface, so you may also access the
tokens with the familiar hasMoreElements( ) and
nextElement( ) methods. When you create a
StringTokenizer, you can specify a string of
delimiter characters to use for the entire string, or you can rely on
the default whitespace delimiters. You can also specify whether the
delimiters themselves should be returned as tokens. Finally, you can
optionally specify a new string of delimiter characters when you call
nextToken( ).
Figure 16-59. java.util.StringTokenizer
 public class StringTokenizer implements Enumeration<Object> {
// Public Constructors
public StringTokenizer (String str );
public StringTokenizer (String str , String delim );
public StringTokenizer (String str , String delim , boolean returnDelims );
// Public Instance Methods
public int countTokens ( );
public boolean hasMoreTokens ( );
public String nextToken ( );
public String nextToken (String delim );
// Methods Implementing Enumeration
public boolean hasMoreElements ( );
public Object nextElement ( );
}
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