Lets say my ArrayList got 20 elements. Well, sometime in runtime I will want it to only have 10 elements, so the other 10 indexes(from 9 to 19) don\'t exis开发者_运维百科t at all. How do I do that?Why
I have an arraylist for some kind of objects. These objects, have some attributes like strings and some integers. But also, an arraylist of another kind of objects.
I try with a loop like that // ArrayList tourists for (Tourist t : tourists) { if (t != null) { t.setId(idForm);
Is it possible to make a child clas开发者_StackOverflow社区s that extends ArrayList? If so, how?You can extend any class that is not final in Java. Having said that, you should avoid inheritance if th
I was just playing around and a thought came to my mind and I decided I want to try it: Make an ArrayList that holds more ArrayLists.
I am new to Android development, and I had a question about an excerpt I read in Commonsware\'s \"The Busy Coder\'s Guide to Android Development\".There is an example where it is constructing a class
I am performing some maintenance tasks on an old system. I have an arraylist that contains following values:
I have JComboBox based on ArrayList: private ArrayList<String> klienci = new ArrayList<String>();
Setting a list of values for a Java ArrayList works: Integer[] a = {1,2,3,4,5,6,7,8,9}; ArrayList<Integer> possibleValues2 = new Arr开发者_运维问答ayList<Integer>(Arrays.asList(a));
I h开发者_运维问答ave an ArrayList<Obj> and I wish to know how much memory it is using. The Obj is variant so, it is not as easy as multiply the number of elements in the array per the size of
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