Plzz solve my error

Question

https://code.sololearn.com/cnz7ZMPyID2Z/?ref=app

Answer 1

Or else
Use string class instead of string buffer, if you may trying this way:

public class Program
{
public static void main(String[] args) {
String sb=new String("hello");
System.out.println(sb.replace('h','r'));

System.out.println(sb); // original string won't change.. try to check
}
}

Answer 2

Kajal Kumari

replace method have 3 parameters

1 - start index int type
2 - end index int type
3 - a string not character

System.out.println(sb.replace(0, 1, "r"));