serializable

问题 I\'ve been reading a lot of posts and articles extolling the speed of Parcelable over Serializable. I\'ve been using both for a while to pass data between Activities through Intents, and have yet to notice any speed difference when switching between the two. The typical amount of data I have to transfer is 5 to 15 nested objects with 2 to 5 fields each. Since I have about 30 classes which must be transferable, implementing Parcelable requires a lot of boilerplate code that adds maintenance

问题 I have inherited a Websphere Portal project that uses Hibernate 3.0 to connect to a SQL Server database. There are about 130 Hibernate table classes in this project. They all implement Serializable. None of them declare a serialVersionUID field, so the Eclipse IDE shows a warning for all of these classes. Is there any actual need for these classes to implement Serializable? If so, is there any tool to add a generated serialVersionUID field to a large number of classes at once (just to make

问题 This question already has answers here : What is a serialVersionUID and why should I use it? (25 answers) Closed last year . I have the warning message given in the title. I would like to understand and remove it. I found already some answers on this question but I do not understand these answers because of an overload with technical terms. Is it possible to explain this issue with simple words? P.S. I know what OOP is. I know what is object, class, method, field and instantiation. P.P.S. If

问题 Why does Android provide 2 interfaces for serializing objects? Do Serializable objects interopt with Android Binder and AIDL files? 回答1: In Android we cannot just pass objects to activities. To do this the objects must either implement Serializable or Parcelable interface. Serializable Serializable is a standard Java interface. You can just implement Serializable interface and add override methods. The problem with this approach is that reflection is used and it is a slow process. This method

问题 I have an ArrayList of an object. The object contains the types \'Bitmap\' and \'String\' and then just getters and setters for both. First of all is Bitmap serializable? How would I go about serializing this to store it in SharedPreferences? I have seen many people ask a similar question but none seem to give a good answer. I would prefer some code examples if at all possible. If bitmap is not serializable then how do I go about storing this ArrayList? many thanks. 回答1: Yes, you can save

问题 I\'m trying to serialize an object to XML that has a number of properties, some of which are readonly. public Guid Id { get; private set; } I have marked the class [Serializable] and I have implemented the ISerializable interface. Below is the code I\'m using to serialize my object. public void SaveMyObject(MyObject obj) { XmlSerializer serializer = new XmlSerializer(typeof(MyObject)); TextWriter tw = new StreamWriter(_location); serializer.Serialize(tw, obj); tw.Close(); } Unfortunately it

问题 What is the difference between Serializable and Externalizable in Java? 回答1: To add to the other answers, by implementating java.io.Serializable , you get "automatic" serialization capability for objects of your class. No need to implement any other logic, it'll just work. The Java runtime will use reflection to figure out how to marshal and unmarshal your objects. In earlier version of Java, reflection was very slow, and so serializaing large object graphs (e.g. in client-server RMI

问题 I understood, I think, that a \"Bean\" is a Java class with properties and getters/setters. As much as I understand, it is the equivalent of a C struct. Is that true? Also, is there a real syntactic difference between a bean and a regular class? Is there any special definition or an interface? Basically, why is there a term for this? Also what does the Serializable interface mean? 回答1: A JavaBean is just a standard All properties private (use getters/setters) A public no-argument constructor