Incompatible type error when attempting to use variable length argument

Question

I am attempting to use a variable length argument in my constructor, however I get the error messages:

1. 'Incompatible types string cannot be converted to int'

2. Illegal start of operation, ';' expected

   public class Personnel {
   
   private String pname;
   private String rank;
   private String certs [];
   
   public static int totalPersonnel = 0;
   
   public Personnel(String name, String rank, String... certs) {
   
       this.pname = name;
       this.rank = rank;
       this.certs =  certs;
   
       incrPersonnel();
   
   }
   
   public static void incrPersonnel(){
       totalPersonnel++;
   }
   
   public static void main(String myArgs[]){
       Personnel Alex = new Personnel ("Alex", "CPT", ["none"] );
   

   }

   }

Answer 1

If you try to pass an array then the way you are using is not correct instead you have to use new String[]{"none"}, so your code should look like this :

public static void main(String myArgs[]) {
    Personnel Alex = new Personnel("Alex", "CPT", new String[]{"none"});  
}

Or you can also use :

public static void main(String myArgs[]) {
    Personnel Alex = new Personnel("Alex", "CPT", "val1", "val2", "val3");
    //--------------------------------------------[_____________________]
}

But in your case you pass only one value, so you don't have to use new String[]{..}, you need just to pass it like this :

Personnel Alex = new Personnel("Alex", "CPT", "none");

If you don't want to pass any value, then you don't need to specify it you can just pass the first and second value like :

Personnel Alex = new Personnel("Alex", "CPT");
//------------------------------------------^____no need to pass

It will return empty for the array