opposite of transient

The serialization mechanism in Java is implemented in two ways:One is to implement the Serializable interfaceThe other is to implement the Externalizable interfaceDifference:Implementing the Serializable interface1 The system automatically stores

1. Class-level annotations @Entity Mapping entity classes @Table map number of database tables @Entity (name= "TableName")-Must be, annotations declare a class as an entity bean. Property: name-Optional, corresponding to a table in the database.

Today, companies are highly dependent on computer networks. In fact, they can hardly run effectively without high-tech electronic devices. Once purchased, the reliable operation of these electronic devices becomes crucial. System faults will not

Thinking logic of computer programs (39) and thinking 39 In the previous section, we introduced the ArrayList. the random access efficiency of ArrayList is very high, but the insertion and deletion performance is relatively low. We mentioned that

A Power distribution System (PDS) is a subsystem that allocates power from power source to each device and device that needs power in the system. In all electrical systems there are power distribution systems, such as the lighting system for a

Recently, I have been studying the theory of 3D audio surround sound reproduction, and found that to realize the real effect of stereo surround, I must make a deeper theoretical and application of the response of human ears to audio. For example,

Martha, Ammasa Here's a good name for feshion, there is no Maserati's sense of sight.What is Martha marshalling? is serialization, translating data structures or object state to a formatImplementation is very simple, Pojo object annotated

JPA (Java Persistence API) is the Java Persistence specification proposed by Sun. It provides Java developers with an object/relational mapping tool to manage relational data in Java applicationsThere are two different ways to annotate a class into

Java object-oriented four features1. Abstraction:Abstraction--is to ignore aspects of a topic that are not relevant to the current goal in order to pay more attention to the aspects related to the current goal. (That is, the real world of a certain

Java Collection framework 08 -- HashMap and source code analysis1. Introduction to HashMap First, let's take a look at the inheritance relationship of HashMap.   java.lang.Object ? java.util.AbstractMap ? java.util.HashMap