Final Keyword In Java

[BarryA]

Using a final keyword in the main method parameter solves the problem. Why is there no compiler error or exception since I modified Java's standard main method?

public class bytes {
 
    public static void main(final String... args) {
        System.out.println("Hi");
 
    }
}

Now let's see if I can code:

public class bytes {
 
    public static void main (String... args) {
 
        String[] str = {"I ", "haven't ", "received ", "my ", "answer." };
        args[0] = "hi";
        System.out.println(args[0]);
        args =str;
        for(int i=0; i<args.length; i++) {
            System.out.print(args[i]);
        }
 
    }
 
}

When you execute the programme using the above coding, pass an argument as:

javac bytes Nisrin

The output of my programme is

hi

I have yet to receive a response.
Now repeat the process with the final keyword.

public class bytes {
 
    public static void main (final String... args) {
 
        String[] str = {"I ", "haven't ", "received ", "my ", "answer." };
        args[0] = "hi";
        System.out.println(args[0]);
        args =str;
        for(int i=0; i<args.length; i++) {
            System.out.print(args[i]);
        }
 
    }
 
}

It throws an error saying that the final parameter, args, cannot be assigned.

Because I am now assigning str to args.

As I am following this source https://www.scaler.com/topics/java/f...yword-in-java/, this indicates I have made a significant difference by include the final keyword in the argument and making it constant in the main method. I'm updating the primary method's signature. So, why am I not receiving any compilation or runtime errors?