org.mortbay.util
Class StringUtil

java.lang.Object
  org.mortbay.util.StringUtil

public class StringUtil
extends Object

Fast String Utilities. These string utilities provide both conveniance methods and performance improvements over most standard library versions. The main aim of the optimizations is to avoid object creation unless absolutely required.

Author:

Greg Wilkins (gregw)

Field Summary

static String	__ISO_8859_1
static String	__LINE_SEPARATOR
static String	__UTF8
static String	CRLF
private static char[]	lowercases

Constructor Summary

StringUtil()

Method Summary

static void	append(StringBuffer buf, byte b, int base) append hex digit
static void	append(StringBuffer buf, String s, int offset, int length) Append substring to StringBuffer
static void	append2digits(StringBuffer buf, int i)
static String	asciiToLowerCase(String s) fast lower case conversion.
static boolean	endsWithIgnoreCase(String s, String w)
static boolean	equals(String s, char[] buf, int offset, int length)
static int	indexFrom(String s, String chars) returns the next index of a character from the chars string
static String	nonNull(String s) Return a non null string.
static String	replace(String s, String sub, String with) replace substrings within string.
static boolean	startsWithIgnoreCase(String s, String w)
static String	toUTF8String(byte[] b, int offset, int length)
static String	unquote(String s) Remove single or double quotes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CRLF

public static final String CRLF

See Also:

Constant Field Values

__LINE_SEPARATOR

public static final String __LINE_SEPARATOR

__ISO_8859_1

public static String __ISO_8859_1

__UTF8

public static final String __UTF8

See Also:

Constant Field Values

lowercases

private static char[] lowercases

Constructor Detail

StringUtil

public StringUtil()

Method Detail

asciiToLowerCase

public static String asciiToLowerCase(String s)

fast lower case conversion. Only works on ascii (not unicode)

Parameters:

s - the string to convert

Returns:

a lower case version of s

startsWithIgnoreCase

public static boolean startsWithIgnoreCase(String s,
                                           String w)

endsWithIgnoreCase

public static boolean endsWithIgnoreCase(String s,
                                         String w)

indexFrom

public static int indexFrom(String s,
                            String chars)

returns the next index of a character from the chars string

replace

public static String replace(String s,
                             String sub,
                             String with)

replace substrings within string.

unquote

public static String unquote(String s)

Remove single or double quotes.

append

public static void append(StringBuffer buf,
                          String s,
                          int offset,
                          int length)

Append substring to StringBuffer

Parameters:

buf - StringBuffer to append to

s - String to append from

offset - The offset of the substring

length - The length of the substring

append

public static void append(StringBuffer buf,
                          byte b,
                          int base)

append hex digit

append2digits

public static void append2digits(StringBuffer buf,
                                 int i)

nonNull

public static String nonNull(String s)

Return a non null string.

Parameters:

s - String

Returns:

The string passed in or empty string if it is null.

equals

public static boolean equals(String s,
                             char[] buf,
                             int offset,
                             int length)

toUTF8String

public static String toUTF8String(byte[] b,
                                  int offset,
                                  int length)