String in JAVA 3

String in JAVA 3

Methods of String Class

The java.lang.String class provides many useful methods to perform operations on sequence of char values. 

Methods	Description
char charAt(int index)	returns char value for the particular index.
int length()	returns string length.
static String format(String format, Object... args)	returns formatted string.
static String format(Locale l, String format, Object... args)	returns formatted string with given localer.
String substring(int beginIndex)	returns substring for given begin index.
String substring(int beginIndex, int endIndex)	returns substring for given begin index and end index.
boolean contains(CharSequence s)	returns true or false after matching the sequence of char value
static String join(CharSequence delimiter, CharSequence... elements)	returns a joined string.
static String join(CharSequence delimiter, Iterable elements)	returns a joined string.
boolean equals(Object another)	checks the equality of string with object.
boolean isEmpty()	checks if string is empty.
String concat(String str)	concatinates specified string.
String replace(char old, char new)	replaces all occurrences of specified char value.
String replace(CharSequence old, CharSequence new)	replaces all occurrences of specified CharSequence.
String trim()	returns trimmed string omitting leading and trailing spaces.
String split(String regex)	returns splitted string matching regex.
String split(String regex, int limit)	returns splitted string matching regex and limit.
String intern()	returns interned string.
int indexOf(int ch)	returns specified char value index.
int indexOf(int ch, int fromIndex)	returns specified char value index starting with given index.
int indexOf(String substring)	returns specified substring index.
int indexOf(String substring, int fromIndex)	returns specified substring index starting with given index.
String toLowerCase()	returns string in lowercase.
String toLowerCase(Locale l)	returns string in lowercase using specified locale.
String toUpperCase()	returns string in uppercase.
String toUpperCase(Locale l)	returns string in uppercase using specified locale.