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Comparing arrays : For comparing arrays and slices of arrays more static utility methods are added to java.util.Arrays. Below are the list of overloaded static methods added in JDK 9 to the Arrays utility class. equals - returns true if two arrays are equal to each other. compare - compares two arrays lexicographically (similar to dictionary order). mismatch - finds

#comparing arrays

Convenience Factory Methods for Collections in JDK 9: This article can be consider as continuation article for the Creating immutable collections before JDK 9. In previous article we explained about how to create unmodifiable collections before JDK 9 and flaws using those techniques. In this article we explained how JDK 9 solves the

#set.of

Creating immutable Collections before JDK9: In Java 9 added some factory methods to create immutable collections. See JEP 269: Convenience Factory Methods for Collections. But this guide will explain the techniques to create immutable collections before JDK 9 and flaws in using these techniques. Java 9 how solved these flaws will be explained in

#unmodifiable set

(via New Stream operations in Java 9 - Java By Developer)

(via interface private methods - Java 9 - Java By Developer)

Entity Role. Cascade. Fetch Type. Direction. mappedBy Attribute. Join Column. Join Tables. Inverse Join Column. 1. Entity Role : In every association there are two entities that are related to one another, each entity play a role which is either Owning Entity or Non-Owning Entity. Assume that there are two tables

#mappedby

Java 9 Module System : One of the most exciting features of Java 9 is its support for developing modular Java applications. This guide shows how to work with Java 9 module system using eclipse step by step. Goals : Create EM (Employee Management) - Common module Project. Create source folder (module) with name

#multiple modules

Stream filter() method : This article is about demonstrating different Stream interface intermediate operations using filter(). filter() returns a stream consisting of the elements of this stream that match the given predicate. Example with forEach() : Program to print even numbers from list of elements. Example with collect() :

#stream filter

(via forEach method in Java 8 - Java By Developer)

(via Collection Framework and key interfaces - Java By Developer)

#collection framework #collection interfaces

(via Collection Framework Introduction - Java By Developer)

#collection framework

(via Generic methods and Wildcard character - Java By Developer)

#generic methods wildcards generics generics wildcards

Merge the state of the given entity into the current persistence context. The merge method's major task is to transfer the state from an unmanaged entity (detached entity) to its managed counterpart within the persistence context. In other words merge will reattach the detached entity to the persistence context. How merge works? When you

#merging entity #jpa merge hibernate merge merge

(via many-to-many bidirectional association - Java By Developer)

#many-to-many bidirectional

(via Bounded type parameters in generics - Java By Developer)

#bounded types #generics bounded types

1. Setting Up Maven 2. Setting Up Mysql Database 3. Importing Maven Project into Eclipse 1. What is JPA (Java Persistence API)? 2. Why Java Persistence API? 3. Why Object Relational Mapping? 4. Terminology and JPA Architecture 5. Configuring JPA in Project 1. How to persist an Entity in

Generic class in general - A class that can refer to any type is known as generic class. To understand Generic classes, lets have a look on generic and nongeneric version of ArrayList Class: Generics are introduced in java 1.5, it means until java 1.4 ArrayList class is nongeneric. java 1.4 non generic version of Arraylist

#java generic classes

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