Jee Java Tutorials
Here you will see tutorial on Spring Boot + ReactJS Example. We have seen many examples of Spring MVC web application application using JSP as a front-end technology but here we will use ReactJS as a front-end technology to represent our UI….
Here we will know the use of @Temporal annotation in JPA. @Temporal is a JPA annotation and generally specified only for persistent fields or properties of type java.util.Date and java.util.Calendar. This @Temporal annotation is generally we use on the date or calendar field…
Composition vs Aggregation explained with Java will show you what is Composition and what is Aggregation? In simple terms, both Composition and Aggregation are Associations. Composition means “Strong Has-A relationship”, whereas, Aggregation means “Weak Has-A relationship”. Composition implies a relationship where the child cannot…
This tutorial will show you Spring Boot Data JPA Left, Right, Inner and Cross Join Examples. We will create here Spring Boot application, where we will use Spring Data JPA Repository to query our database tables. We will use here custom query using…
This example will show you how to segregate positive followed by negative elements in an Array using Java programming language. The function will put all positive numbers first, and then negative numbers and finally count the number of moves required to arrange…
This tutorial we show you how to connect multiple database servers using Hibernate framework. We Hibernate is an ORM framework for the automated persistence of objects in a Java application to the tables in a relational database. You get many advantages from…
In this tutorial we will how to mock Activiti TaskService, TaskQuery, NativeTaskQuery in Junit test class. Suppose you have Spring service class where you are doing some business flow for your application. So you are using activiti’s TaskService to create list of…
This example shows you hot to convert milliseconds into days, hours, minutes, seconds in Java. Sometimes we need to convert the milliseconds into days or hours or minutes or seconds. Typically when you want to check the exact time taken to execute…
Here we will see how to read last n lines from a file using Java programming language. Last “n” lines means last 10 lines or 20 lines or 30 lines etc. So “n” should be replaced by an appropriate numeric value. Obviously the…
This tutorial example will show you how to mock ObjectFactory<KieSession>, KieSession and KieStatelessSession using Junit. KieSession is the most common way to interact with the engine in Drools. A KieSession allows the application to establish an iterative conversation with the engine, where…