StringBuilder charAt() in Java with Examples
The charAt(int index) method of StringBuilder Class is used to return the character at the specified index of String contained by StringBuilder Object. The index value should lie between 0 and length()-1.
public char charAt(int index)
Parameters: This method accepts one int type parameter index which represents index of the character to be returned.
Return Value: This method returns character at the specified position.
Exception: This method throws IndexOutOfBoundsException when index is negative or greater than or equal to length().
Below programs demonstrate the charAt() method of StringBuilder Class:
StringBuilder Object contains = Geek Character at Position 1 in StringBuilder = e
String is WelcomeGeeks Char at position 0 is W Char at position 1 is e Char at position 2 is l Char at position 3 is c Char at position 4 is o Char at position 5 is m Char at position 6 is e Char at position 7 is G Char at position 8 is e Char at position 9 is e Char at position 10 is k Char at position 11 is s
Example 3: To demonstrate IndexOutOfBoundException
Exception: java.lang.StringIndexOutOfBoundsException: String index out of range: 12
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