“DataOutputStream”之间的差异和“ObjectOutputStream” [英] difference between "DataOutputStream" and "ObjectOutputStream"

问题描述

我是一名初学程序员，遵循此 Java教程。

I'm a beginner programmer following this Java Tutorial.

在基本I / O 部分，提到的两个类是数据流和对象流。

In the Basic I/O section, two of the classes mentioned are Data Streams and Object Streams.

非常类似地使用它们：

out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(dataFile)));

// ..

in = new DataInputStream(new BufferedInputStream(new FileInputStream(dataFile)));

DataInputStream 和

out = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(dataFile)));

// ..

in = new ObjectInputStream(new BufferedInputStream(new FileInputStream(dataFile)));

ObjectInputStream

我知道它说 DataInputStreams 用于原始对象， ObjectInputStreams 是用于对象（及其序列化），我应该使用哪一个？两个使用原始类型的示例类之间没有明显的区别。我通常也使用原始类型。

I know it says that DataInputStreams are used for primitive objects, and ObjectInputStreams are used for objects (and serialization of them), so which one should I use? It isn't a noticeable difference between the two example classes which both use primitive types. I usually use primitive types, too.

对于性能，哪一个更好？还有其他大的差异吗？

For performance, which one is better? and are there any other large differences?

谢谢。

推荐答案

DataStreams 用于原语类型的的I / O， int ， float ， double 等等。

DataStreams are used for I/O of primitive types which are int, float, double and so on.

ObjectStreams 用于对象的I / O 。

如果你知道你将明确使用原始类型，那么使用 DataStreams ，否则使用更通用的 ObjectStreams 实现 DataInput接口以及 ObjectInput接口因此可以使用基元和对象。

If you know you're going to be explicitly working with primitive types then use DataStreams, otherwise go with the more generic ObjectStreams which implement the DataInput interface as well as ObjectInput interface so can work with primitives as well as objects.

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