command line argument

import java.util.*;
public class Command {
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        System.out.println("Arguments are:"+Arrays.toString(args));
        System.out.println("Enter key");
        String key=sc.nextLine();
        for(int i=0;i<args.length;i++){
            if(key.equals(args[i])){
                System.out.println("Key Found at: "+i);
                break;
            }
        }
    }
}