What is JPA Entity Relationship? Multiplicities are of the following types. Create JPA Entity with One-to-One Relationship Reference: In this example, we create Instructor and InstructorDetail entities and we make a one-to-one mapping between them. Create a new project…
Collections Overview The Java Collections Framework standardizes the way in which groups of objects are handled by your programs. Collections were not part of the original Java release but were added by J2SE 1.2. Prior to the Collections Framework, Java…
What is Java System Properties and Spring Application Configuration? Java System Properties Java maintains a set of system properties for its operations. Each java system property is a key-value (String-String) pair. For example, one such system property is “java.version”=”1.7.0_09“. All…
What is JSON, HTTP Methods, REST API and Web Server? JSON JSON Syntax Rules HTTP Methods The Hypertext Transfer Protocol (HTTP) is designed to enable communications between clients and servers. HTTP works as a request-response protocol between a client and…
Class Fundamentals A Java class is often used to represent a concept. A Java class is often used to store or represent data for the construct that the class represents. For example, you could create a model (a programmatic representation)…
Why Data Types Are Important Java is a strongly-type language. It means that every variable defined must have a data type assigned to it. Java’s Primitive Data Types Integer Floating Point Character True/False byteshortintlong floatdouble char boolean 1, 2, 3,…
Running Maven from Command-Line To run a Maven build from the command line / terminal, you need to install the Maven command line tooling. Compile and build a Java runtime library with Maven To compile you project from command line,…
Run your Java console application in Eclipse Debug your Java console application in Eclipse Introduction to Maven Dependency and Maven Central Repository Reference: A repository in Maven holds build artifacts and dependencies of varying types. There are exactly two…
Reference: Apache Maven is a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project’s build, reporting and documentation from a central piece of information. Maven, a Yiddish…