write java program to convert the first character in a string to uppercase

public class Main {
public static void main(String[] args) {   
 
 //write java program to convert the first character in a string to uppercase
    String s="nerdutella.com";
    String firstChar=Character.toString(s.charAt(0));
    firstChar=firstChar.toUpperCase();
    String newS=firstChar;
    for(int i=1;i<s.length();i++)
    newS=newS+Character.toString(s.charAt(i));
    System.out.println("the string after converting first character to uppercase: "+newS);
   }
}

output:

the string after converting first character to uppercase: Nerdutella.com