PrintWriter和DataOutputStream有什么区别？ [英] What is the Difference between PrintWriter and DataOutputStream?

问题描述

我正在研究Android的聊天室应用程序。我读了不同的教程;其中一些使用PrintWriter发送数据，其中一些使用DataOutputStream。这两者有什么区别？哪一个更适合聊天应用？

I'm working on a chat room application for android. I read different tutorials; some of them use PrintWriter to send data and some of them use DataOutputStream. What is the difference between these two? Which one is better for a chat app?

推荐答案

来自java docs

From java docs

DataOutputStream 允许应用程序将原始Java数据类型写入以便携方式输出流。然后，应用程序可以使用数据输入流来重新读取数据。

A DataOutputStream lets an application write primitive Java data types to an output stream in a portable way. An application can then use a data input stream to read the data back in.

PrintWriter 将对象的格式化表示形式打印到文本输出流。此类实现PrintStream中的所有打印方法。它不包含写入原始字节的方法，程序应该使用未编码的字节流。

PrintWriter Prints formatted representations of objects to a text-output stream. This class implements all of the print methods found in PrintStream. It does not contain methods for writing raw bytes, for which a program should use unencoded byte streams.

在一句话中，区别在于：

In one sentence the difference is:

OutputStreams用于二进制数据。作家（包括PrintWriter）用于文本数据

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