Common Methods for string strings

charAt(int index)	Char	ReturnscharValue.
equals(Object anObject)	Boolean	Compares the string with the specified object.
getBytes()	Byte []	Use the default Character Set of the platformStringEncode the data as a byte sequence and store the results in a new byte array.
getBytes(String charsetName)	Byte []	Use the specified character setStringEncode the data as a byte sequence and store the results in a new byte array.
indexOf(String str)	Int	Returns the index of the first occurrence of the substring.
isEmpty()	boolean	When and only whenlength()Is0ReturnsTrue.
indexOf(int ch)	Int	Returns the index of the first occurrence of the specified character in this string.
length()	Int	Returns the length of this string.
matches(String regex)	Boolean	Indicates whether the string matches the given regular expression.
toCharArray()	Char []	Converts a string to a new character array.

toString()	String	Returns the object itself (it is already a string !).
toUpperCase()	String	Use the rules of the default language environmentStringAll characters in are converted to uppercase letters
toLowerCase()	String	Use the rules of the default language environmentStringAll characters in are converted to lowercase letters.
valueOf(Object obj)	static String	ReturnObjectParameter string representation.
trim()	String	Returns a copy of the string, ignoring leading and trailing spaces.
equalsIgnoreCase(String anotherString)	boolean	Set thisStringWith anotherStringComparison, case insensitive
endsWith(String suffix)	boolean	Test whether the string ends with the specified suffix.
contains(CharSequence s)	Boolean	Returns true if and only if the string contains the specified char value sequence.

Common Methods for string strings