Java string type Method

 

Method Summary
char	charAt(int index)  ReturnscharValue.
int	codePointAt(int index)  Returns the characters (UNICODE code points) at the specified index ).
int	codePointBefore(int index)  Returns the character (UNICODE Code Point) before the specified index ).
int	codePointCount(int beginIndex, int endIndex)  Return thisStringNumber of Unicode code points in the specified text range.
int	compareTo(String anotherString)  Compares two strings in alphabetical order.
int	compareToIgnoreCase(String str)  Compare two strings in alphabetical order, regardless of case.
String	concat(String str)  Link the specified string to the end of the string.
boolean	contains(CharSequence s)  True is returned only when this string contains the specified sequence of char values.
boolean	contentEquals(CharSequence cs)  If and only whenStringReturns the same char value as the specified sequence.True.
boolean	contentEquals(StringBuffer sb)  If and only whenStringIndicatesStringbufferReturns the same character sequence.True.
static String	copyValueOf(char[] data)  Returns the string that represents the character sequence in the specified array.
static String	copyValueOf(char[] data, int offset, int count)  Returns the string that represents the character sequence in the specified array.
boolean	endsWith(String suffix)  Test whether the string ends with the specified suffix.
boolean	equals(Object anObject)  Compare this string with the specified object.
boolean	equalsIgnoreCase(String anotherString)  Set thisStringWith anotherStringFor comparison, case-insensitive.
static String	format(Locale l, String format, Object... args)  Returns a formatted string using the specified language environment, format string, and parameter.
static String	format(String format, Object... args)  Returns a formatted string using the specified format string and parameters.
byte[]	getBytes()  Use the default Character Set of the platformStringDecodes the data into a byte sequence and stores the results in a new byte array.
void	getBytes(int srcBegin, int srcEnd, byte[] dst, int dstBegin)  Expired. This method cannot correctly convert characters into bytes. From JDK 1.1, the preferred method to complete the conversion is throughgetBytes()Constructor. This method uses the default Character Set of the platform.
byte[]	getBytes(String charsetName)  Use the specified character setStringDecodes the data into a byte sequence and stores the results in a new byte array.
void	getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin)  Copy the character string to the target character array.
int	hashCode()  Returns the hash code of this string.
int	indexOf(int ch)  Returns the index of the first occurrence of the specified character in this string.
int	indexOf(int ch, int fromIndex)  Searches from the specified index and returns the index at the specified character for the first time in this string.
int	indexOf(String str)  Returns the index of the first occurrence of the specified substring in this string.
int	indexOf(String str, int fromIndex)  Returns the index of the first occurrence of the specified substring from the specified index.
String	intern()  Returns the canonicalized representation of string objects.
int	lastIndexOf(int ch)  Returns the index of the last occurrence of the specified character in this string.
int	lastIndexOf(int ch, int fromIndex)  Start Backward Search from the specified index, and return the index of the last occurrence of the specified character in this string.
int	lastIndexOf(String str)  Returns the index of the rightmost substring in this string.
int	lastIndexOf(String str, int fromIndex)  Searches backward from the specified index and returns the index of the specified sub-string that appears the last time in this string.
int	length()  Returns the length of this string.
boolean	matches(String regex)  Indicates whether the string matches the given regular expression.
int	offsetByCodePoints(int index, int codePointOffset)  Return thisStringFromindexOffsetcodePointOffsetCode points.
boolean	regionMatches(boolean ignoreCase, int toffset, String other, int ooffset, int len)  Test whether the two string regions are equal.
boolean	regionMatches(int toffset, String other, int ooffset, int len)  Test whether the two string regions are equal.
String	replace(char oldChar, char newChar)  Returns a new string by usingnewCharReplace alloldChar.
String	replace(CharSequence target, CharSequence replacement)  Replace this string with each substring that matches the target sequence of the literal value.
String	replaceAll(String regex, String replacement)  Replace this string with the given replacement string to match each substring of the given regular expression.
String	replaceFirst(String regex, String replacement)  Replace the string with the given replacement string to match the first substring of the given regular expression.
String[]	split(String regex)  Splits the string based on the matching of the given regular expression.
String[]	split(String regex, int limit)  Splits the string based on the given regular expression.
boolean	startsWith(String prefix)  Test whether the string starts with the specified prefix.
boolean	startsWith(String prefix, int toffset)  Test whether the string starts with the specified prefix. The prefix starts with the specified index.
CharSequence	subSequence(int beginIndex, int endIndex)  Returns a new character sequence, a subsequence of this sequence.
String	substring(int beginIndex)  Returns a new string, which is a substring of this string.
String	substring(int beginIndex, int endIndex)  Returns a new string, which is a substring of this string.
char[]	toCharArray()  Converts a string to a new character array.
String	toLowerCase()  Use the rules of the default language environmentStringAll characters in are converted to lowercase letters.
String	toLowerCase(Locale locale)  Use the givenLocaleThe ruleStringAll characters in are converted to lowercase letters.
String	toString()  Returns the object itself (it is already a string !).
String	toUpperCase()  Use the rules of the default language environmentStringAll characters in are converted to uppercase letters.
String	toUpperCase(Locale locale)  Use the givenLocaleThe rule sets thisStringAll characters in are converted to uppercase letters.
String	trim()  Returns a copy of the string, ignoring leading and trailing spaces.
static String	valueOf(boolean b)  ReturnbooleanParameter string representation.
static String	valueOf(char c)  ReturncharParameter string representation.
static String	valueOf(char[] data)  ReturncharString Representation of array parameters.
static String	valueOf(char[] data, int offset, int count)  ReturncharThe string representation of the special sub-array of the array parameter.
static String	valueOf(double d)  ReturndoubleParameter string representation.
static String	valueOf(float f)  ReturnfloatParameter string representation.
static String	valueOf(int i)  ReturnintParameter string representation.
static String	valueOf(long l)  ReturnlongParameter string representation.
static String	valueOf(Object obj)  ReturnObjectParameter string representation.