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EclipseLink JPA With H2 Database

EclipseLink JPA With H2 Database

EclipseLink JPA With H2 Database explains step by step details of setting / configuring Java Persistence JPA With EclipseLink And H2

How To Configure EclipseLink JPA With H2?

Java Persistence API, is a standard interface which wraps different ORM tools such as  EclipseLink, Hibernate, OpenJPA etc.

ie; you can able to change Hibernate implementation to EclipseLink implementation without changing the code base.

On this standalone JPA Example, we are using Java Persistence With H2 Database

EclipseLink is popular open source ORM (Object Relation Mapping) tool for Java platform, for mapping an entity to a traditional relational like Oracle, MySQL, SQL Server, PostgreSQL, DB2, Derby, Sybase, H2 etc

Hibernate JPA With H2 Database

Hibernate JPA With H2 Database

Hibernate JPA With H2 Database explains step by step details of setting / configuring Java Persistence JPA With Hibernate And H2

How To Configure Hibernate JPA With H2?

Java Persistence API, is a standard interface which wraps different ORM tools such as  Hibernate, EclipseLink, OpenJPA etc.

ie; you can able to change Hibernate implementation to EclipseLink implementation without changing the code base.

On this standalone JPA Example, we are using Java Persistence With H2 Database

Hibernate is popular open source ORM (Object Relation Mapping) tool for Java platform, for mapping an entity to a traditional relational like Oracle, MySQL, SQL Server, PostgreSQL, DB2, Derby, Sybase, H2 etc

I am going to reuse JPA Tutorial With Hibernate

Java Batch Update Example With SQL Statement & PreparedStatement

Java Batch Update Example With SQL Statement & PreparedStatement

In this example, we are showing how to use Java Batch Update Example With SQL Statement & PreparedStatement

In batch update, update happens on the database as batches, which will increase the processing speed and performance. We can use batch updates for both JDBC Statement & PreparedStatement. You can see the JDBC examples for both Statement & PreparedStatement below.

In this tutorial, we are using H2 database and inserting some data using Java Batch Update

Convert Java Collection / List / String[] Array Into JSON

Convert Java Collection / List / String[] Array Into JSON

In this example, we are going to convert a Java collection/list/string[] array into appropriate JSON String using GSON library

Note

I have already written an article about GSON, Convert Java Object To / From JSON, GSON Example, Please see it

 

Calculate Area / Circumference Of Circle Using Java Math.PI

Calculate Area / Circumference Of Circle Using Java Math.PI

In this example, we are going to explain the usage of Java Math.PI to calculate area / circumference of circle

On below example, we are using Math.PI for finding the area / circumference of circle.


Formula to find the Area/Circumference are below

Area = radius*radius*PI
Circumference = PI*radius*2

Read File Using Java Scanner Class

Read File Using Java Scanner Class

Read File Using Java Scanner Class explains about the usage of Java Scanner class API.

while (scnr.hasNextLine()) {
	String line = scnr.nextLine();
	System.out.println( lineNum + " : " + line);
	lineNum++;
}

On above code, we are using java.util.Scanner class methods, method scanner.nextLine() is used for reading whole content line by line

Another important method of Scanner class is useDelimiter(), which allows you to change the delimiter accordingly.

Get / Find Package Name Of Java Class

Get / Find Package Name Of Java Class

In this tutorial, we are find / get the package name of a Java class by providing the class name using java API.

Package packs = str.getClass().getPackage();

On above code we are using object.getClass().getPackage() method for getting the package name.

How To view Content Of H2 In-memory & File Database

How To view Content Of H2 In-memory & File Database

In this tutorial, we are discussing about the usage of H2 Console Application. This console application is available with h2 package.

We can see / browse the contents in H2 Database in a browser, by using this handy tool

View the content of H2 Database

H2 Console application helps you to view the database contents using a browser, whether it is a In-Memory database or a File based database.  It is also possible to view the contents of other database, if it is according to JDBC standards.

We need to start both client / server inorder to view the contents of database through browser.

Reference -> http://www.h2database.com/html/main.html