serializable | 易学教程

What is the difference between “conflict serializable” and “conflict equivalent”?

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问题 In database theory, what is the difference between "conflict serializable" and "conflict equivalent"? My textbook has a section on conflict serializable but glosses over conflict equivalence. These are probably both concepts I am familiar with, but I am not familiar with the terminology, so I am looking for an explanation. 回答1: Just two terms to describe one thing in different ways. Conflict equivalent : you need to say Schedule A is conflict equivalent to Schedule B. it must involve two

What's the best way of ensuring a Function argument is serializable?

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问题 I'm writing a serializable class that takes several arguments, including a Function : public class Cls implements Serializable { private final Collection<String> _coll; private final Function<String, ?> _func; public Cls(Collection<String> coll, Function<String, ?> func) { _coll = coll; _func = func; } } func is stored in a member variable, and so needs to be serializable. Java lambdas are serializable if the type they're being assigned to is serializable. What's the best way to ensure that

HashMap not Serializable

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来源： https://stackoverflow.com/questions/32790025/hashmap-not-serializable

Bad state Unexpected diagnostics on json_serializable package with flutter

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来源： https://stackoverflow.com/questions/63334661/bad-state-unexpected-diagnostics-on-json-serializable-package-with-flutter

Bad state Unexpected diagnostics on json_serializable package with flutter

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来源： https://stackoverflow.com/questions/63334661/bad-state-unexpected-diagnostics-on-json-serializable-package-with-flutter

Java中对象序列化与反序列化

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1. 概念把对象转换为字节序列的过程称为对象的序列化。把字节序列恢复为对象的过程称为对象的反序列化。对象的序列化主要有两种用途：把对象的字节序列永久地保存到硬盘上，通常存放在一个文件中；在网络上传送对象的字节序列。　　在很多应用中，需要对某些对象进行序列化，让它们离开内存空间，入住物理硬盘，以便长期保存。比如最常见的是Web服务器中的Session对象，当有10万用户并发访问，就有可能出现10万个Session对象，内存可能吃不消，于是Web容器就会把一些seesion先序列化到硬盘中，等要用了，再把保存在硬盘中的对象还原到内存中。　　当两个进程在进行远程通信时，彼此可以发送各种类型的数据。无论是何种类型的数据，都会以二进制序列的形式在网络上传送。发送方需要把这个Java对象转换为字节序列，才能在网络上传送；接收方则需要把字节序列再恢复为Java对象。 2. JDK类库中的序列化API java.io.ObjectOutputStream代表对象输出流，它的writeObject(Object obj)方法可对参数指定的obj对象进行序列化，把得到的字节序列写到一个目标输出流中。　　java.io.ObjectInputStream代表对象输入流，它的readObject()方法从一个源输入流中读取字节序列，再把它们反序列化为一个对象，并将其返回。　

Android - passing hashmap through intent

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问题 I'm trying to pass a Hashmap of custom objects through an intent. I am trying to use parcelable as that's what i read is the correct way to do things in android (i.e. parcelable over serializable). However, when i try and get the hashmap using getParcelable, it can't find my hashmap in the intent, but getSerializable can. Is it OK to use serializable for hashmaps? Is this my only option? 回答1: You can of course serialize your map, as long as your Objects are serializable. What you also could

Serializable Hibernate data object for GWT RPC

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问题 I have a simple POJO mapped to a table using Hibernate. Which works just fine. public class Patient implements Serializable { private int patientId; private String firstName; private String lastName; private Set<Prescription> patientPrescriptions; public Patient() {} ... } My problem is I want to be able to serialize the object so I can get it trough the wire for my GWT-RPC calls. If my async service return this object I get an error: com.google.gwt.user.client.rpc.SerializationException:

How can I serialize a class to XML using Windows Phone 8 SDK?

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问题 I've got one attribute (_XMLPlaylist) that I want to serialize in a XML-file likeshown in the code: private void btn_Save_Click(object sender, RoutedEventArgs e) { _Playlist.Pl_Name = tb_Name.Text.ToString(); _XMLPlaylist.Playlists.Add(_Playlist); IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication(); using (IsolatedStorageFileStream isoStream = new IsolatedStorageFileStream(StudiCast.Resources.AppResources.Playlists, FileMode.CreateNew, isoStore)) { using

serialVersionUID naming convention

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问题 Is there any viable reason why serialVersionUID field is not named SERIAL_VERSION_UID? According to the docs for java.io.Serializable: A serializable class can declare its own serialVersionUID explicitly by declaring a field named "serialVersionUID" that must be static, final , and of type long: ANY-ACCESS-MODIFIER static final long serialVersionUID = 42L; While referring Java Naming Conventions all static final (constants) fields should be capitilized having its fragments separated with an