Mar 29, 2014 · Can you suggest some best practices, do I need to define the ArrayList with the instance variables or can I do it in the constructor. Thanks for your suggestions!

0 Your hobbies object is suppose to be of type ArrayList<String> To it pass to your Description class constructor you can do it like this

Apr 24, 2013 · 5 Java 9 allows you to create an unmodifiable list with a single line of code using List.of factory:

private ArrayList<Player> team; { // This is an instance initializer. team = new ArrayList<Player>(); } and instance initializers are gathered together and inserted into every constructor which invokes …

Apr 23, 2013 · 0 I'm trying to write a constructor for a class which accepts an ArrayList (containing integers) as one of it's arguments. When instantiating this class later, I will pass an appropriate, pre …

I am trying to add newly created objects to an ArrayList in the constructor of a class. The new objects are being created in another class in the main method. Main method: public static void main(S...

Sep 29, 2020 · 1 If i understood your question correct, you need to pass in a new ArrayList to the Names constructor class, and maybe add a method to add elements to that list, so e.g.

Jul 17, 2020 · I was practicing the visitor pattern. And I found something interesting that the program created a new ArrayList inside the constructor, which confuses me. For example: class Computer …

14 Because the version in the constructor is creating a new variable that just happens to be named the same as your member field, and the member field remains not set. This is known as variable …

May 2, 2013 · 5 Simply: you are iterating over people but you should iterate over other.people variable. Just a note: ArrayList already provides a constructor to add all items of another collection: