Replacing Alphabets in Strings

public class ReplaceExample1
{
    public static void main(String args[])
    {
        String s1="gulzar group of Institutes Khanna, Ludhiana";
        String s2 =s1.replace('g','G');
        System.out.println("Original String = " + s1);
        System.out.println("\nAfter converting g into G the new string is");
        System.out.println("\nNew String = " + s2);
    }
}