The Question : 628 people think this question is useful How can I get the last value of an ArrayList? I don’t know the last index of the ArrayList. The Question Comments : I upvoted this question, because I was wondering why there’s no such a method like: getLastItem() and came to see if there
The Question : 1072 people think this question is useful How might I convert an ArrayList<String> object to a String array in Java? The Question Comments : Have made this answer with an updated approach with JDK-11 introducing a new an equally performant API to toArray(T) and similar in syntax to Stream.toArray. The Answer 1
The Question : 1167 people think this question is useful I’m working in the android environment and have tried the following code, but it doesn’t seem to be working. If I define as follows: it works. Is there something that I’m missing? The Question Comments : use String stockArr = (String) stock_list.toArray(new String[0]); refer
The Question : 2853 people think this question is useful I wanted to create a list of options for testing purposes. At first, I did this: Then, I refactored the code as follows: Is there a better way to do this? The Question Comments : If this is intended for unit testing, try groovy out
The Question : 3685 people think this question is useful I have an array that is initialized like: I would like to convert this array into an object of the ArrayList class. The Question Comments : In Java9 –> List<String> list = List.of(“Hello”, “World”, “from”, “Java”); @MarekM This answer is wrong, as this doesn’t return
The Question : 3685 people think this question is useful I have an array that is initialized like: I would like to convert this array into an object of the ArrayList class. The Question Comments : In Java9 –> List<String> list = List.of(“Hello”, “World”, “from”, “Java”); @MarekM This answer is wrong, as this doesn’t return
The Question : 2853 people think this question is useful I wanted to create a list of options for testing purposes. At first, I did this: ArrayList<String> places = new ArrayList<String>(); places.add("Buenos Aires"); places.add("Córdoba"); places.add("La Plata"); Then, I refactored the code as follows: ArrayList<String> places = new ArrayList<String>( Arrays.asList("Buenos Aires", "Córdoba", "La Plata")); Is there
The Question : 3207 people think this question is useful I’ve always been one to simply use: List<String> names = new ArrayList<>(); I use the interface as the type name for portability, so that when I ask questions such as these I can rework my code. When should LinkedList be used over ArrayList and vice-versa?
The Question : 3685 people think this question is useful I have an array that is initialized like: Element array = {new Element(1), new Element(2), new Element(3)}; I would like to convert this array into an object of the ArrayList class. ArrayList<Element> arraylist = ???; The Question Comments : In Java9 –> List<String> list =
The Question : 0 people think this question is useful I have created an object ArrayList, private ArrayList<Object> objects; and I am initializing it in a constructor. public ObjectManager(Handler handler) { this.handler = handler; objects = new ArrayList<>(); } This ArrayList is then painted/added it to a canvas. public void renderObjects(Graphics g) { handler.getObjectManager().addObject(new InstanceOfObject(handler,
问题内容: I have two array $array1 = array("2017-12-08","2017-12-09","2017-12-10","2017-12-11","2017-12-12","2017-12-13","2017-12-14","2017-12-15","2017-12-16","2017-12-17","2017-12-18","2017-12-19","2017-12-20","2017-12-21","2017-12-22"); $array2 = array("Y","Y","Y","Y","Y","N","N","N","Y","Y","Y","N","N","Y","Y"); I need the first and last date where the key=”Y”. Like this: $result = array("2017-12-08 - 2017-12-12", "2017-12-16 - 2017-12-18", "2017-12-21 - 2017-12-22"); How i can make this? I have tried with array_combine but after that I do not know how to list the
