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FlexDoc/Javadoc 2.0 Demo Java Doc |
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:
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
Constructor Summary |
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StringTokenizer(String str)
Constructs a string tokenizer for the specified string.
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Constructs a string tokenizer for the specified string.
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Constructs a string tokenizer for the specified string.
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Method Summary |
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int |
Calculates the number of times that this tokenizer's
nextToken method can be called before it generates an
exception.
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boolean |
Returns the same value as the hasMoreTokens
method.
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boolean |
Tests if there are more tokens available from this tokenizer's string.
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Returns the same value as the nextToken method,
except that its declared return value is Object rather than
String.
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Returns the next token from this string tokenizer.
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Returns the next token in this string tokenizer's string.
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Methods inherited from class java.lang.Object |
Methods inherited from interface java.util.Enumeration |
public StringTokenizer |
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.
public StringTokenizer |
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.
public StringTokenizer |
(String str) |
" \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.
public boolean hasMoreTokens |
() |
public String nextToken |
() |
public String nextToken |
(String delim) |
public boolean hasMoreElements |
() |
public Object nextElement |
() |
public int countTokens |
() |
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FlexDoc/Javadoc 2.0 Demo Java Doc |