IT Nursery
public static ArrayList mainList = someList; How can I get a specific item from this ArrayList? mainList...
I had this code: String lineElements; . . . try { using (StreamReader sr = new StreamReader("TestFile.txt")) { String line; while ((line = sr.ReadLine()) != null) { lineElements =...
How can I check if a value that is written in scanner exists in an ArrayList? List<CurrentAccount> lista = new ArrayList<CurrentAccount>(); CurrentAccount conta1 = new CurrentAccount("Alberto Carlos", 1052); CurrentAccount...
I try with a loop like that // ArrayList tourists for (Tourist t : tourists) { if (t != null) { t.setId(idForm); } } But it isn’t nice. Can...
I am wanting to create an array of arraylist like below: ArrayList<Individual> group = new ArrayList<Individual>()...
So, normally ArrayList.toArray() would return a type of Object….but supposed it’s an Arraylist of object Custom, how do I make toArray() to return a type of Custom rather than...
I have an ArrayList, a Collection class of Java, as follows: ArrayList<String> animals = new ArrayList<String>(); animals.add("bat"); animals.add("owl"); animals.add("bat"); animals.add("bat"); As you can see, the animals ArrayList consists of...
I use a lot of lists and arrays but I have yet to come across a scenario in which the array list couldn’t be used just as easily as,...
This question already has answers here: Sort ArrayList of custom Objects by property (29 answers) Closed 8 years ago. I have a class named Fruit. I am creating a...
This question already has answers here: Initialization of an ArrayList in one line (33 answers) Closed 6 years ago. ArrayList or List declaration in Java has questioned and answered...