Important String Functions in JAVA
1 toUpperCase() :: Convert string to upper case
2 toLowerCase() :: Convert string to lower case
3 valueOf :: Convert given value to string.
4 equals :: Check 2 strings are equal or not.
5 equalsWithIgnoreCase :: Check 2 strings are equal or not(case insensitive).
6 subString :: return substring to given string.
7 Replace :: replace a value in given styring.
8 trim() :: is used to removing blanks from start and end of string.
9 Split() :: split string on basis of given regular exp.
10 Length :: return length of the string
11 Concat :: Concatenate the two string.
12 IndexOf : to find the index of first occurrence of character.
13 LastIndexOf : to find the index of first occurrence of character.
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