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The Java has a number of methods and functions that are available for use with strings. These methods and functions are listed below in alphabetical order. For more details about any one of these, please visit its page.

Java String Methods
MethodDescription
charAt() Returns the character at the specified index.
codePointAt() Returns the Unicode of the character at the specified index.
codePointBefore() Returns the Unicode of the character before the specified index.
codePointCount() Returns the number of Unicode code points in the specified text range.
compareTo() Compares two strings lexicographically.
compareToIgnoreCase() Compares two strings lexicographically, ignoring case differences.
concat() Appends a string to the end of another string.
contains() Returns true if the string contains the specified sequence of char values.
contentEquals() Compares the string to the specified CharSequence.
copyValueOf() Returns a String that represents the characters of the character array.
endsWith() Checks whether a string ends with the specified character(s).
equals() Compares two strings. Returns true if the strings are equal, and false if not.
equalsIgnoreCase() Compares two strings, ignoring case considerations.
format() Returns a formatted string using the specified locale, format string, and arguments.
getBytes() Encodes this String into a sequence of bytes using the named charset, storing the result into a new byte array.
getChars() Copies characters from a string to an array of chars.
hashCode() Returns the hash code of a string.
indexOf() Returns the position of the first found occurrence of specified characters in a string.
intern() Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index.
isEmpty() Checks whether a string is empty or not.
join() Returns a new string composed of CharSequence elements joined together with the specified delimiter.
lastIndexOf() Returns the position of the last found occurrence of specified characters in a string.
length() Returns the length of a specified string.
matches() Searches a string for a match against a regular expression, and returns the matches.
offsetByCodePoints() Returns the index within this String that is offset from the given index by codePointOffset code points.
regionMatches() Tests if two string regions are equal.
replace() Searches a string for a specified value, and returns a new string where the specified values are replaced.
replaceFirst() Replaces the first occurrence of a substring that matches the given regular expression with the given replacement.
replaceAll() Replaces each substring of this string that matches the given regular expression with the given replacement.
split() Splits a string into an array of substrings.
startsWith() Checks whether a string or substring of a string starts with specified prefix.
subSequence() Returns a new character sequence that is a subsequence of this sequence.
substring() Extracts the characters from a string, beginning at a specified start position, and through the specified number of character.
toCharArray() Converts this string to a new character array.
toLowerCase() Converts a string to lower case letters.
toString() Returns the value of a String object.
toUpperCase() Converts a string to upper case letters.
trim() Removes whitespace from both ends of a string.
valueOf() Returns the string representation of the given argument.

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