在java中将int的流转换为char [英] Converting stream of int's to char's in java

问题描述

这可能已经回答了其他问题，但是你如何获得int值的字符值？

This has probably been answered else where but how do you get the character value of an int value?

特别是我正在从tcp流中读取一个并且读者.read（）方法返回一个int。

Specifically I'm reading a from a tcp stream and the readers .read() method returns an int.

如何从中获取一个字符？

How do I get a char from this?

推荐答案

如果您尝试将流转换为文本，则需要了解要使用的编码。然后，您可以将一个字节数组传递到 String 构造函数并提供 Charset ，或使用 InputStreamReader ，带有相应的 Charset 而不是。

If you're trying to convert a stream into text, you need to be aware of which encoding you want to use. You can then either pass an array of bytes into the String constructor and provide a Charset, or use InputStreamReader with the appropriate Charset instead.

只需从 int 转换为 char 只有当你想要直接从流中读取字节时才能使用ISO-8859-1。

Simply casting from int to char only works if you want ISO-8859-1, if you're reading bytes from a stream directly.

编辑：如果是已经使用 Reader ，然后将 read（）的返回值转换为 char 是正确的方法（在检查它是否为-1之后）...但通常更有效和方便的是调用 read（char []，int，int）读取整个块o f一次发短信。不要忘记检查返回值，以查看已读取的字符数。

If you are already using a Reader, then casting the return value of read() to char is the right way to go (after checking whether it's -1 or not)... but it's normally more efficient and convenient to call read(char[], int, int) to read a whole block of text at a time. Don't forget to check the return value though, to see how many characters have been read.

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