StringBuffer setCharAt() method in Java with Examples

// Java program to demonstrate
// the setCharAt() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuffer object
        // with a String pass as parameter
        StringBuffer str
            = new StringBuffer("Geeks For Geeks");

        // print string
        System.out.println("String = "
                           + str.toString());

        // set char at index 4 to '0'
        str.setCharAt(7, '0');

        // print string
        System.out.println("After setCharAt() String = "
                           + str.toString());
    }
}

// Java program to demonstrate
// Exception thrown by the setCharAt() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuffer object
        // with a String pass as parameter
        StringBuffer str
            = new StringBuffer("Geeks for Geeks");

        try {

            // pass index -1
            str.setCharAt(-1, 'T');
        }

        catch (Exception e) {
            System.out.println("Exception:" + e);
        }
    }
}