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Parse JSON to Java – Streaming Parser and Generator Jackson provides a low-level API to parse JSON to Java. The API provides token for each JSON object. For example, the start of JSON ‘{‘ is the first object that the parser provides. The key value pair is another single object. The client code can use … Read more
Jackson – Java to JSON Jackson provides classes that can be used to convert a Java Object to JSON and back. In this example, we look at how to convert Java to JSON and JSON to Java. We will start with a simple class and gradually start adding complexities to it. Let’s say that we … Read more
Overview of the Java JSON Jackson library The java JSON Jackson is a JSON library for Java It has very powerful data binding capabilities and provides a framework to serialize custom java objects to JSON and deserialize JSON back to Java objects. JSON written with Jackson can contain embedded class information that helps in creating the … Read more
Introduction Java 8 comes with a much improved and much required change in the way date and time is handled. Almost all of us have experienced the pains of working with date in java. Most of us have switched to Joda Time, but java 8 has changed that with a much cleaner and more extensive … Read more
Introduction In the first article we learned about Lambdas, functional interfaces and method references introduced in Java 8. In the previous article we saw some of the new methods added in the Collections hierarchy. In this article we look at what is probably the most important addition to Java since generics – Streams. Streams make … Read more
Introduction In the first article we learned about Lambdas, functional interfaces and method references introduced in Java 8. In the previous article we saw default methods in interfaces and their inheritance rules. In this article we look at the new default methods added in the Collections hierarchy. Many of the new methods make use of … Read more
Default Methods In the previous article we learned about functional programming using lambdas introduced in java8. We also learned about functional interfaces and method references. In this tutorial we will look at a side effect in Java8 – Default methods. The designers in Java always strive for backward compatibility, and so to add methods to … Read more
Introduction The introduction of functional programming in Java8 has caused quite a buzz amongst java enthusiasts. It is probably the biggest change in Java since the introduction of generics. Java has lacked this feature which has been quite popular in other languages such as Lisp, Clojure, Haskell, R etc. In this slightly length..ish tutorial we … Read more
Template pattern is a behavioral pattern that allows part of an algorithm to vary independent of the rest of the algorithm. In other words, the bulk of the algorithm logic is defined in a base class (could be abstract) and the part that can change is defined in a derived class. Each derived class can … Read more
The Observer pattern is such a popular design pattern that the jdk has provided a set of classes that make it easy to implement it. Here’s how we define the pattern : An Observer pattern allows multiple objects to “observe” or “listen to” the changes in one object. To explain the Observer pattern lets use … Read more