The codePointAt() method of StringBuffer class returns a character Unicode point at that index in sequence contained by StringBuffer. This method returns the “Unicodenumber” of the character at that index. Value of index must be lie between 0 to length-1.
If the char value present at the given index lies in the high-surrogate range, the following index is less than the length of this sequence, and the char value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at the given index is returned.
public int codePointAt(int index)
Parameters: This method takes one parameter index which is int value representing index of the character whose unicode value to be returned.
Return Value: This method returns unicode number of the character at the specified index.
Exception: This method throws IndexOutOfBoundsException when index is negative or greater than or equal to length().
Below programs demonstrate the codePointAt() method of StringBuffer Class:
Unicode of Character at Position 10 in StringBuffer = 101
Example 2: To demonstrate IndexOutOfBoundsException
Exception: java.lang.StringIndexOutOfBoundsException: String index out of range: 25
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