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Tutorial
7

Step 2: Define a JPA Entity Class

(and its annotations) - the Point class is an ordinary Java class. The next step is adding a Main class
Tutorial
7

Step 2: Define a JPA Entity Class

. But nevertheless, this class is a valid ObjectDB entity class, despite the warning. The next step is adding a Main
Tutorial
7

Step 2: Entity Class and Persistence Unit

that was added to the project (under Other Sources > src/main/resources > META-INF). Open
Tutorial
7

Step 4: Run the Application

You can run the application now by right clicking the Main.java node (in the [Package Explorer] window) and selecting Run As > Java Application. The expected output in the Eclipse [Console] window, is: Total Points: 1000 Average X: 499.5 (0,0) (1,1) (2,2) (3,3) : : (998,998) (999,999
Tutorial
7

Step 4: Run the Application

You can run the application now by right clicking the Main node (in the [Projects] window) and selecting Run File. The expected output in the [Output] window, is: Total Points: 1000 Average X: 499.5 (0,0) (1,1) (2,2) (3,3) : : (998,998) (999,999) When you run the application
Tutorial
7

Step 5: Add a JSP Page

In this step we will add the JSP that generates the guestbook HTML output: Open the [New JSP File] dialog box by right clicking WEB-INF under src/main/webapp (in the [Package Explorer] window), selecting New > Other... > Web > JSP File and clicking Next. The parent folder should be WEB-INF
Tutorial
7

Step 6: Set the Spring XML

and click Next. Enter spring-servlet as the File Name. The Folder should be src\main\webapp\WEB-INF
FAQ
7

What is the Java Persistence API (JPA)?

The Java Persistence API (JPA) is a standard API for accessing databases from within Java applications. The main advantage of JPA over JDBC (the older Java API for interacting with databases) is that in JPA data is represented by classes and objects rather than by tables and records as in JDBC
Manual
7

Working with JPA Entity Objects

(except retrieval by refresh, which always requires accessing the database). The main role of the persistence
Manual
7

Database Replication and Clustering

master-slave replication the master node manages the main (master) database, which supports Read