InputStreamReader.markSupported 为 false
我需要从 InputStreamReader 中“取消读取”字符。为此，我想使用 mark 和 reset 但 markSupported 为 InputStreamReader 返回 false code> 类，因为它不维护内部缓冲区和/或字符队列。
我知道 BufferedInputStream 和 PushbackInputStream 但这里都不合适，因为它们缓冲以字节为基础，而我需要字符。
Java 是否提供了可以不读取字符的缓冲字符读取器？实际上，让我进一步限制一下，我只需要取消读取一个字符（用于前瞻目的）。我真的需要保持自己的前瞻性吗？
I need to “un-read” characters from an InputStreamReader. For that purpose I wanted to use mark and reset but markSupported returns false for the InputStreamReader class, since it doesn’t maintain an internal buffer and/or queue of characters.
I know about BufferedInputStream and PushbackInputStream but neither is appropriate here since they buffer on byte basis, while I need characters.
Does Java offer a buffered character reader which can un-read characters? Actually, let me constrain that further, I only ever need to un-read a single character (for lookahead purposes). Do I really need to maintain my own lookahead?
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两个基于字节流的类
java.io.BufferedInputStream和java.io.PushbackInputStream在同一个包中拥有基于字符流的对应类：The two byte-stream based classes
java.io.BufferedInputStreamandjava.io.PushbackInputStreamhave their character-stream based counterparts in the same package:您尝试过 java.io.BufferedReader 吗？
Have you tried java.io.BufferedReader?
您可以使用 BufferedReader 包装输入流。
缓冲读取器确实支持标记和读取字符。
You could wrap the input stream using a
BufferedReaderThe buffered reader does support mark and reads characters.