Change String value using reflection

Main.java

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

public class Main
{
    public static void main(String[] args) throws Exception {
        //Create a new String "Hello"
        String s = "Hello";
        
        //Change the value of "s" variable to "Goodbye"
        change(s, "Goodbye");
        
        //Print it to see the change
        System.out.println(s);
    }
    
    private static void change(String s, String val) throws Exception {
        Field value = String.class.getDeclaredField("value");
        value.setAccessible(true);
        
        Field mod = Field.class.getDeclaredField("modifiers");
        mod.setAccessible(true);
        mod.setInt(value, value.getModifiers() & ~Modifier.FINAL);
        
        value.set(s, val.toCharArray());
    }
}