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Java Object Tutorial

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In this post, we feature a comprehensive article on the Java Object class, which is the parent class of all the classes. The article and the examples used are based on JDK 8. You can also check the Java Classes and Objects Tutorial in the following video: Java Classes and Objects Tutorial – video Table Of Contents 1.Introduction 2.Parts of ...

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Nested If Statements in Java

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In this article we will look how to write nested if Statements in Java. 1. Introduction in Java Java is a popular programming language, created in 1995. It is owned by Oracle, and more than 3 billion devices run Java. It is used for mobile applications (especially Android apps), desktop applications, web servers, and application servers, games, and much more. ...

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Introduction to Apache Wink

1. Overview In this article, we will take a look at the Apache Wink Web Service examples. Apache Wink 1.0 is a JAX-RS 1.0 compliant and it has features related to the coreJAX-RS specification. 2. Apache Wink Using Apache Wink, REST web services are built. REST is an acronym for “Representational State Transfer”. Roy Fielding was the first person to ...

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Java Optional Parameters

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In this post, we feature a comprehensive article about the Java Optional Parameters. When you design a method in a Java class, some parameters may be optional for its execution. 1. Java Optional Parameters You can tackle Java optional parameters in a method in several different ways. We will see them in the following: 1.1 Mutability with accessors Using standard ...

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Topological Sort Java Example

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In this article, we will discuss the Topological sort Java algorithm. We will start with graphs, some common types, and to store graphs. 1. Graph and common types A graph is a non-linear data structure consisting of a finite set of Vertices (also called nodes) connected by Edges. Fig 1. A sample Graph with vertices and edges In the above ...

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Printstream Java Example

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This article is a quick introduction to the Printstream Java class available as part of Java ecosystem. 1. Introduction Stream refers to data essentially bytes at lowest level. To read and process data from a source, the data needs to be saved. Outputstream is the means to save the data to a sink. Outputstream is the superclass of all classes ...

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Apache Spark Installation Guide

In this post, we feature a comprehensive Apache Spark Installation Guide. 1. Introduction Apache Spark is an open-source cluster computing framework with in-memory data processing engine. It provides API in Java, Scala, R, and Python. Apache Spark works with HDFS and can be up to 100 times faster than Hadoop Map-Reduce. It also supports other high-level tools like Spark-SQL for ...

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What is Spring Framework

In this article, we are going to explain what is Java Spring framework. We are going to learn about architecture, core features, different modules, and feature additions from Spring 5. The Spring Framework is an open-source, lightweight application framework and Inversion of Control container for the Java platform. The first version of the Spring Framework was released in 2003. The ...

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Apache CXF Web Service Example

In this article, we will implement an Apache CXF Web service example. Webservices can be developed using SOAP and REST. SOAP refers to Simple Object Access Protocol. REST stands for Representational State Transfer. 1. Overview Roy Fielding was the first person to come up with the REST architecture proposal. In REST, a Resource is a Uniform Resource Identifier or URI. The ...

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Liferay 7.2 MVC Portlet Development and Deployment

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In this post, we feature a comprehensive article about Liferay 7.2 MVC Portlet, an open source content management system that is developed in Java. It provides web content management and many inbuilt modules like login, web content, calendar, polls, users and roles management. Integration with LDAP. In Liferay, we can develop any dynamic website fastly. Liferay is also providing staging ...

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