implements serializable

1. parcelableInterface Interface for classes whose instances can be written to and restored from a parcel. Classes implementing the parcelable interface must also have a static field called Creator, which is an object implementing the parcelable.

  In many applications, some objects need to be serialized so that they can leave the memory space and stay on the physical hard disk for long-term storage. For example, the most common session object in the web server, When there are 0.1 million

1. Create a project and databaseProject name: mybatis092901Database Name: mybatis0929Table Name: DeptCreate Table 'dept '('Deptno' int (11) not null,'Deptname' varchar (30) default null,'Location' varchar (30) default null,Primary Key ('deptno '))

In recent years, ORM (object-relational mapping; object relationship ing, that is, ing between object and database tables) technology has become a buzz in the market, sun has developed a new JPA (Java persistence API) specification based on the

Developing entity beans in ejb3.0 is very simple. You can program it like developing Java Beans, with only a small amount of comments required. An entity bean does not need to implement the home interface or remote or local interface. Entity beans

6. Request log The request log stores the request history.Log File)Is permanently stored in the computer. Many systems provide log files, such as Windows Log Files and Oracle log files. log files can record user operations on the system (such as

EJB 3.0 Development Guide-Entity Bean (1) Developing entity beans in ejb3.0 is very simple. You can program it like developing Java Beans, with only a small amount of comments required. An entity bean does not need to implement the home interface or

Memory architecture of Java Virtual Machine After learning about the JVM basics, let's take a look at the memory architecture of the Java Virtual Machine. This is a prerequisite for understanding the JVM garbage collection algorithm, after

Prototype Pattern: Prototype Pattern and prototypepattern I. Overview: Use a prototype instance to specify the type of the object to be created and copy the prototype to create a new object. Simply put, an object is copied to generate a new object

Combined primary key generation policy in Hibernate, hibernate primary keyI. Configure the joint primary key in xml Design a class separately as the primary key class, such as StudentPK A. Serializable Interface) B. Rewrite equals () and hashCode ()

Android learning path 1: How to transmit data between activitiesTransmit dataCreate Activity Right-click the project, select New, continue to select the Activity at the bottom of the project, and finally click Blank Activity. At this time, Android

@ Onetoone: four attributes 1. targetentity The targetentity attribute is a class attribute. Defines the types of object classes that are subordinate to an object in a one-to-one relationship. 2. mappedby The mappedby attribute is a string

1. parcelableInterface Interface for classes whose instances can be written to and restored from a parcel. Classes implementing the parcelable interface must also have a static field called Creator, which is an object implementing the parcelable.

Multiple-to-multiple relationships use the ing policy of the intermediate table connection. The created intermediate table introduces the primary keys on both sides as foreign keys. @ Suppresswarnings ("serial ") @ Entity @ Table (name = "student ")

From: http://blog.csdn.net/haydenwang8287/archive/2010/10/25/5964130.aspx Serialization is a very common and powerful function in Java. In my opinion, it is one of the most common functions of Java to save Java objects to a disk and read them from

6.6.4 multi-to-Multi- ing Students and teachers are many-to-many relationships. One student has multiple teachers and one teacher teaches multiple students. Multiple-to-multiple mappings use the ing of intermediate table connections Policy. The

In many applications, some objects need to be serialized so that they can leave the memory space and stay on the physical hard disk for long-term storage. For example, the most common is the session object in the Web server. When 0.1 million users

Once upon a time there was a person who thought there was only an unusual dog in the world, so he wrote the following class and wrote itAs a singleton [gamma95]: Public class dog extends exception {public static final dog instance = new dog ();

Hibernate Cache The cache of Hibernate is mainly implemented in the net. sf. hibernate. cache package. For specific code, see the Hibernate source code. 1. CacheThis interface defines some basic cache operations, such as get, put, lock, and unlock.

Memcached building a cache system I. ConceptMemcached is a set of distributed memory object caching systems developed by danga.com (the technical team of operations LiveJournal) to reduce database load and improve performance in dynamic