Java Questions
Method Overriding in Java Example An instance method in a child class that has the same method signature of the parent class is sail to be overriding the parent’s class method. Using this feature we can provide a child-specific implementation for the method. We can use the @Ovevrride annotation when we are overriding the method. […]
CurrencyConverter Java Program(Dollars to Pounds) In this tutorial, we will write a java program to convert Dollar to Pound and vice-versa. We will provide a program menu to the user. The Dollar to the pound exchange rate is taken as a constant in the program. In real-time, the exchange can vary from time to time. […]
What is an ArrayList? ArrayList is a resizable array in Java. It is an implementation of the List interface. Array is fixed in size, whereas ArrayList can grow or shrink dynamically as needed to accommodate adding and removing elements. Class Diagram ArrayList is random access list. It supports fast and generally constant access time for […]
How to create a Sample Servlet using Eclipse? Let us create a sample servlet and deploy it on the Tomcat server. First of all, create a Web Project in Eclipse. For instructions for creating a web project in eclipse, please go through the following question. ( http://www.testingdocs.com/questions/how-to-deploy-a-war-file-in-tomcat-using-eclipse/ ) Create Sample Servlet Right-click the source […]
String Literals vs String Objects String is associated with a string literal in the form of double-quoted text. You can assign a string literal directly into a String variable. String objects are created by a new operator and String constructor. However, this is not recommended in Java. Strings are immutable String is an immutable sequence […]
Differences between JSON and XML In this tutorial, you will learn the differences between JSON and XML. Let’s first understand each term and then look at the differences between them. What is JSON? JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines […]