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Hibernate Enum Type Mapping Example

In hibernate; developers can map the Java Enum type to a column in the database. In this tutorial, we will explore how a Java Enum type is stored in the database. 1. Introduction Object-Relational Mapping or ORM is the programming technique to map application domain model objects to the relational database tables Hibernate is a Java-based ORM tool that provides ...

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Using an enum as a state machine

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In this short example, a parser state machine processes raw XML from a ByteBuffer. Each state has its own process method and if there is not enough data available, the state machine can return to retrieve more data. Each transition between states is well defined and the code for all states is together in one enum. interface Context { ByteBuffer ...

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Each Enum Instance a different sub-class

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In this example we shall show you how to have each enum instance represent a different sub-class. To make each enum instance represent a different sub-class one should perform the following steps: Create an enum with different enum constants. Give each enum constant a different behavior for some method. Declare the method abstract in the enum type and override it with ...

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Enum to implement an interface

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With this example we are going to demonstrate how to use an enum to implement an interface. Implementing an interface with an enum can be useful when we need to implement some business logic that is tightly coupled with a discriminatory property of a given object or class. In short, to implement an interface with an enum you should: Create ...

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Enum for Singleton and Utility class

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enum Singleton { INSTANCE; } enum Utility { ; // no instances } Related Article: Java Secret: Using an enum to build a State machine Reference: Java Secret: Using an enum to build a State machine from our JCG partner Peter Lawrey at the Vanilla Java blog

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