Jun 17, 2009 · ArrayList<String> list = new ArrayList<String>() {{ add("A"); add("B"); add("C"); }}; However, I'm not too fond of that method because what you end up with is a subclass of …

ArrayList or List declaration in Java has questioned and answered how to declare an empty ArrayList but how do I declare an ArrayList with values? I've tried the following but it returns a …

The ArrayList constructed by asList is not a java.util.ArrayList, only shares the same. In fact, it cannot be, as the return value of asList is specified to be a fixed size list, but an ArrayList must …

MyClass(String, String, int); i know about how to add to add to ArrayList in this way: java

Oct 1, 2008 · If you look, Arrays ISN'T returning a true java.util.ArrayList. It's returning an inner class that implements the required methods, but you cannot change the memebers in the list.

The integer passed to the constructor represents its initial capacity, i.e., the number of elements it can hold before it needs to resize its internal array (and has nothing to do with the initial …

Jan 17, 2012 · I faced with the similar issue, and just knowing the arrayList is a resizable-array implementation of the List interface, I also expect you can add element to any point, but at …

Apr 24, 2013 · Closed 7 years ago. I have an sample program as shown. I want my ArrayList symbolsPresent to be initialized with some predefined symbols: ONE, TWO, THREE, and FOUR.

I'me getting a NullPointerException when adding an item to an ArrayList IF the ArrayList is isn't initialized as a field. Can anyone explain why? WORKS when I initialize the ArrayList as a field:

Jan 5, 2018 · ArrayList<Integer> al = new ArrayList<>(Arrays.asList(1,2,3,4,5); Now of al is 5 and it is filled with numbers 1,2,3,4 and 5. Also, you need to be aware that ArrayList doesn't work …