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java.lang.Object org.apache.hadoop.util.StringUtils
public class StringUtils
General string utils
Nested Class Summary | |
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static class |
StringUtils.TraditionalBinaryPrefix
The traditional binary prefixes, kilo, mega, ..., exa, which can be represented by a 64-bit integer. |
Field Summary | |
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static char |
COMMA
|
static String |
COMMA_STR
|
static char |
ESCAPE_CHAR
|
Constructor Summary | |
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StringUtils()
|
Method Summary | |
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static String |
arrayToString(String[] strs)
Given an array of strings, return a comma-separated list of its elements. |
static String |
byteDesc(long len)
Return an abbreviated English-language desc of the byte length |
static String |
byteToHexString(byte[] bytes)
Same as byteToHexString(bytes, 0, bytes.length). |
static String |
byteToHexString(byte[] bytes,
int start,
int end)
Given an array of bytes it will convert the bytes to a hex string representation of the bytes |
static String |
camelize(String s)
Convert SOME_STUFF to SomeStuff |
static String |
capitalize(String s)
Capitalize a word |
static String |
escapeHTML(String string)
Escapes HTML Special characters present in the string. |
static String |
escapeString(String str)
Escape commas in the string using the default escape char |
static String |
escapeString(String str,
char escapeChar,
char charToEscape)
Escape charToEscape in the string
with the escape char escapeChar |
static String |
escapeString(String str,
char escapeChar,
char[] charsToEscape)
|
static int |
findNext(String str,
char separator,
char escapeChar,
int start,
StringBuilder split)
Finds the first occurrence of the separator character ignoring the escaped separators starting from the index. |
static String |
formatPercent(double done,
int digits)
Format a percentage for presentation to the user. |
static String |
formatTime(long timeDiff)
Given the time in long milliseconds, returns a String in the format Xhrs, Ymins, Z sec. |
static String |
formatTimeDiff(long finishTime,
long startTime)
Given a finish and start time in long milliseconds, returns a String in the format Xhrs, Ymins, Z sec, for the time difference between two times. |
static String |
getFormattedTimeWithDiff(DateFormat dateFormat,
long finishTime,
long startTime)
Formats time in ms and appends difference (finishTime - startTime) as returned by formatTimeDiff(). |
static String |
getHostname()
Return hostname without throwing exception. |
static Collection<String> |
getStringCollection(String str)
Returns a collection of strings. |
static String[] |
getStrings(String str)
Returns an arraylist of strings. |
static byte[] |
hexStringToByte(String hex)
Given a hexstring this will return the byte array corresponding to the string |
static String |
humanReadableInt(long number)
Given an integer, return a string that is in an approximate, but human readable format. |
static String |
join(CharSequence separator,
Iterable<String> strings)
Concatenates strings, using a separator. |
static String |
join(CharSequence separator,
Object[] objects)
Concatenates objects, using a separator. |
static String |
join(CharSequence separator,
String[] strings)
Concatenates strings, using a separator. |
static String |
limitDecimalTo2(double d)
|
static String |
simpleHostname(String fullHostname)
Given a full hostname, return the word upto the first dot. |
static String[] |
split(String str)
Split a string using the default separator |
static String[] |
split(String str,
char escapeChar,
char separator)
Split a string using the given separator |
static void |
startupShutdownMessage(Class<?> clazz,
String[] args,
org.apache.commons.logging.Log LOG)
Print a log message for starting up and shutting down |
static String |
stringifyException(Throwable e)
Make a string representation of the exception. |
static Path[] |
stringToPath(String[] str)
|
static URI[] |
stringToURI(String[] str)
|
static String |
unEscapeString(String str)
Unescape commas in the string using the default escape char |
static String |
unEscapeString(String str,
char escapeChar,
char charToEscape)
Unescape charToEscape in the string
with the escape char escapeChar |
static String |
unEscapeString(String str,
char escapeChar,
char[] charsToEscape)
|
static String |
uriToString(URI[] uris)
|
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final char COMMA
public static final String COMMA_STR
public static final char ESCAPE_CHAR
Constructor Detail |
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public StringUtils()
Method Detail |
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public static String stringifyException(Throwable e)
e
- The exception to stringify
public static String simpleHostname(String fullHostname)
fullHostname
- the full hostname
public static String humanReadableInt(long number)
number
- the number to format
public static String formatPercent(double done, int digits)
done
- the percentage to format (0.0 to 1.0)digits
- the number of digits past the decimal point
public static String arrayToString(String[] strs)
strs
- Array of strings
public static String byteToHexString(byte[] bytes, int start, int end)
bytes
- start
- start index, inclusivelyend
- end index, exclusively
public static String byteToHexString(byte[] bytes)
public static byte[] hexStringToByte(String hex)
hex
- the hex String array
public static String uriToString(URI[] uris)
uris
- public static URI[] stringToURI(String[] str)
str
- public static Path[] stringToPath(String[] str)
str
- public static String formatTimeDiff(long finishTime, long startTime)
finishTime
- finish timestartTime
- start timepublic static String formatTime(long timeDiff)
timeDiff
- The time difference to formatpublic static String getFormattedTimeWithDiff(DateFormat dateFormat, long finishTime, long startTime)
dateFormat
- date format to usefinishTime
- fnish timestartTime
- start time
public static String[] getStrings(String str)
str
- the comma seperated string values
public static Collection<String> getStringCollection(String str)
str
- comma seperated string values
ArrayList
of string valuespublic static String[] split(String str)
str
- a string that may have escaped separator
public static String[] split(String str, char escapeChar, char separator)
str
- a string that may have escaped separatorescapeChar
- a char that be used to escape the separatorseparator
- a separator char
public static int findNext(String str, char separator, char escapeChar, int start, StringBuilder split)
str
- the source stringseparator
- the character to findescapeChar
- character used to escapestart
- from where to searchsplit
- used to pass back the extracted stringpublic static String escapeString(String str)
str
- a string
public static String escapeString(String str, char escapeChar, char charToEscape)
charToEscape
in the string
with the escape char escapeChar
str
- stringescapeChar
- escape charcharToEscape
- the char to be escaped
public static String escapeString(String str, char escapeChar, char[] charsToEscape)
charsToEscape
- array of characters to be escapedpublic static String unEscapeString(String str)
str
- a string
public static String unEscapeString(String str, char escapeChar, char charToEscape)
charToEscape
in the string
with the escape char escapeChar
str
- stringescapeChar
- escape charcharToEscape
- the escaped char
public static String unEscapeString(String str, char escapeChar, char[] charsToEscape)
charsToEscape
- array of characters to unescapepublic static String getHostname()
public static void startupShutdownMessage(Class<?> clazz, String[] args, org.apache.commons.logging.Log LOG)
clazz
- the class of the serverargs
- argumentsLOG
- the target log objectpublic static String escapeHTML(String string)
string
-
public static String byteDesc(long len)
public static String limitDecimalTo2(double d)
public static String join(CharSequence separator, Iterable<String> strings)
separator
- Separator to join with.strings
- Strings to join.
public static String join(CharSequence separator, String[] strings)
separator
- to join withstrings
- to join
public static String join(CharSequence separator, Object[] objects)
separator
- to join withobjects
- to join
public static String capitalize(String s)
s
- the input string
public static String camelize(String s)
s
- input string
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