LinkedHashMap: insert List of Strings

Question

I have a LinkedHashMap and I want to insert a List of Strings just to some of the 'headers' of my Expandable List, but for some reason I can't and I get the error

java.lang.IndexOutOfBoundsException: Invalid index 10, size is 1

LinkedHashMap <String, List<String>> expandableListDetail2 = new LinkedHashMap<String, List<String>>();

        List<String> category_header = new ArrayList<String>();
        List<Producto> produtos;
        Database db = new Database(context);
        List<Categorias> categories;

        categories = db.getAllCategorias();

        for (int i=0; i<categories.size(); i++){

            expandableListDetail2.put(categories.get(i).toString(), category_header);

            produtos = db.getAllProductos(categories.get(i).toString());


               for(int j=0;j<produtos.size();j++) {
                   category_header.add(i, produtos.get(i).getNameProducto());
               }

        }

I'm getting error on the line where I have category_header.add(...) and all the products are been added to all keys. Can you help?

Nit: you don't need to have the conditional if (produtos.size() > 0) because the for loop checks it anyway. — Andy Turner
– Andy Turner, Commented Oct 25, 2015 at 21:22

Linus · Accepted Answer · 2015-10-25 21:25:09Z

3

What you're doing is using i where you should use j

if (produtos.size() > 0) {
   for(int j=0;j<produtos.size();j++) {
       category_header.add(i, produtos.get(j).getNameProducto());
   }
}

Also it is not neccessary to have an extra if (produtos.size() > 0) { because if produtos.size() is zero the for loop will iterate zero times anyway.

edited Oct 25, 2015 at 21:25

answered Oct 25, 2015 at 21:21

Linus

1,52818 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

porthfind Over a year ago

No..because I want to insert my list of products a specific category. Not all categories have products...so I have 'i' to identify the correct category to insert my products. And changing it to j, as you said I also get the error.

Linus Over a year ago

@porthfind Surely you can't use produtos.get(i).getNameProducto() with index i beacuse that will cause an exception.

porthfind Over a year ago

You are right, I though you were talking about first 'i' on the category_header.add. But even so I go on with the same error, with another index...Invalid index 10, size is 0

porthfind Over a year ago

The problem is on "produtos.get(j).getNameProducto()" but I don't know why :\

Linus Over a year ago

@porthfind It could be in the getNameProducto function.

Collectives™ on Stack Overflow

LinkedHashMap: insert List of Strings

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related