从文件读取后，特殊字符未正确填充

Question

InputStreamReader isr = new InputStreamReader(new FileInputStream(f), "UTF-8");

According to rule it should return all specified characters as it is in stream. But it is not working fine. It is converting special characters into some invalid character strings.

Input characters : éÇüéâäàåçêëèïîìÄÅÉæ

output after reading from above method :

Answer 1

This means that your stream is not in UTF-8. It may be in Windows-1252 or ISO 8859-1 or some other encoding.

The reader needs to use the encoding that the stream is encoded with, in order to read it properly.

Article worth noting: The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)