| charAt() | Char at given position of the string |
| codePointAt() | Unicode vlaue of Char at given position of the string |
| codePointBefore() | Unicode vlaue of Char at before the given position of the string |
| codePointCount() | Number of Unicode chars inside a range of a string |
| compareTo() | Case sensitive string comparison |
| compareToIgnoreCase() | Case insensitive string comparison |
| concat() | Case sensitive string comparison |
| contains() | Check if string contains a sequence of chars |
| copyValueOf() | Returns string by using chars of char array |
| endsWith() | Check the string ending with input string or not |
| equals() | Check if two strings are equal or not ( case sensitive) |
| equalsIgnoreCase() | Check if two strings are equal or not |
| format() | Formatting string outputs |
| getBytes() | Creates a byte array by using sequence of bytes used in string |
| getChars() | Copy range of chars of a string |
| hashCode() | Creates hash code of the string |
| indexOf() | position of a matching string or char from left |
| intern() | string intern to get instance of memory |
| isEmpty() | check string if it is empty or not |
| lastIndexOf() | position of a matching string or char from right |
| length() | Length of the string |
| replace() | Replace all occurrence of string or char |
| replaceAll() | regular expression string replacement |
| replaceFirst() | Replace first occurrence of string or char |
| startsWith() | Check the string starting with input string or not |
| split() | Breaking a string with delimiters |
| substring() | Part of the string with start and end positions |
| toCharArray() | char Array from the input string |
| toUpperCase() | Converts all lowercase char to uppercase |
| toLowerCase() | Converts all Uppercase char to lowercase |
| trim() | Removing space from left and right side of the string |
| join() | Concatenates the string elements by using a delimiter |
| valueOf() | Converting any type to String |