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java.lang.Object org.apache.nutch.util.StringUtil
public class StringUtil
A collection of String processing utility methods.
Constructor Summary | |
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StringUtil()
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Method Summary | |
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static byte[] |
fromHexString(String text)
Convert a String containing consecutive (no inside whitespace) hexadecimal digits into a corresponding byte array. |
static boolean |
isEmpty(String str)
Checks if a string is empty (ie is null or empty). |
static String |
leftPad(String s,
int length)
Returns a copy of s padded with leading spaces so
that it's length is length . |
static void |
main(String[] args)
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static String |
parseCharacterEncoding(String contentType)
Parse the character encoding from the specified content type header. |
static String |
resolveEncodingAlias(String encoding)
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static String |
rightPad(String s,
int length)
Returns a copy of s padded with trailing spaces so
that it's length is length . |
static String |
toHexString(byte[] buf)
Convenience call for toHexString(byte[], String, int) , where
sep = null; lineLen = Integer.MAX_VALUE . |
static String |
toHexString(byte[] buf,
String sep,
int lineLen)
Get a text representation of a byte[] as hexadecimal String, where each pair of hexadecimal digits corresponds to consecutive bytes in the array. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public StringUtil()
Method Detail |
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public static String rightPad(String s, int length)
s
padded with trailing spaces so
that it's length is length
. Strings already
length
characters long or longer are not altered.
public static String leftPad(String s, int length)
s
padded with leading spaces so
that it's length is length
. Strings already
length
characters long or longer are not altered.
public static String toHexString(byte[] buf)
toHexString(byte[], String, int)
, where
sep = null; lineLen = Integer.MAX_VALUE
.
buf
- public static String toHexString(byte[] buf, String sep, int lineLen)
buf
- input datasep
- separate every pair of hexadecimal digits with this separator, or
null if no separation is needed.lineLen
- break the output String into lines containing output for lineLen
bytes.public static byte[] fromHexString(String text)
text
- input text
public static String parseCharacterEncoding(String contentType)
null
is returned.
contentType
- a content type headerpublic static boolean isEmpty(String str)
public static String resolveEncodingAlias(String encoding)
public static void main(String[] args)
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