Java non-static method addInv(int) cannot be referenced from a static context

Question

I know this error very well however this is the once time I\'m stumped. I know that I can\'t call non-static variables from main method but this is confusing. Maybe you can help

Answer 1

You can't call a non static method from a static method. So either make addInv static:

public class Item {
    ...

    public static void main(String args[]) {
        addInv(1);
    }

    public static void addInv(int e) {
        ...
    }

    public static String[] getItem(int e) {
        ...
    }
}

But making all these methods static may not be an appropriate design, you might prefer using an Item instance in your main:

public class Item {
    ...

    public static void main(String args[]) {
        Item item = new Item();
        item.addInv(1);
    }

}

By the way, I don't mean to be rude but you should seriously work on your (awful) code formatting and conventions, both for readers and for you.

See also

• Code Conventions for the Java Programming Language
• How to Write Doc Comments for the Javadoc Tool