In this lesson, you will learn how to clone Java arrays. We will discuss the concept of a shallow and deep copy, and look at single and...
Accessing Array Elements in JavaScript Adding Elements to an Array in JavaScript Removing Elements from Array We are very familiar with the Arraylist in Java that allows us to add elements to an array without specifying its size. It is a nice feature but do we have anything similar in Ja...
To add an element in ArrayList, we can use the remove( ) method. This method also has variations. 1 class ArrayList1{ 2 3 public static void main(String args[]){ 4 5 ArrayList<String> ArrayList<String>(); 6 7 arlist.add("JAVA"); 8 9 arlist.add("Cshar...
import java.util.HashSet; import java.util.Set; public class IterateOverHashSet { public static void main(String[] args) { Set<String> mySet = new HashSet<>(); mySet.add("Apple"); mySet.add("Banana"); mySet.add("Mango"); String[] myArray = mySet.toArray(new String[mySet....
etc. In order to sort an ArrayList of custom or user-defined objects, you need two things, first a class to provide ordering and a method to provide sorting. If you know about ordering and sorting in Java then you know that theComparableandComparatorclass is used to provide the ordering ...
different data fields, such as one to one, one to many, unique, required, or optional, and add “pointers” among different tables. The system enforces these rules so that, with a well-designed database, an application never sees data that’s inconsistent, duplicated, orphaned, or out of...
Mapping a java.util.Date to the database requires additional code to convert to an Aerospike representation and back for example. Sub-objects which also need to be stored in the database must be handled separately. Changing the representation of the information between the database and the POJO...
IDEA also supports using anEditorConfigfile to define the code style. You can create a newEditorConfigfile by right-clicking on the.ideafolder and then selectingNew|New EditorConfig File. This will be our root, add the standard EditorConfig properties and IntelliJ IDEA-specific settings for Java ...
Swing and JavaFX are two commonly used applications to create GUIs in Java. Elements of GUI: A GUI comprises an array of user interface elements. All these elements are displayed when a user is interacting with an application and they are as follows: 1. Input commands such as buttons, ...
Coding lets you create things. One of the coolest benefits of learning how to code is the ability to bring your ideas to life. Have a concept for a website, app, or computer game? Now, you can build it exactly how you want, then share it with the world. I still remember the thr...