public static Charset guessEncoding(File f, int bufferLength, Charset defaultCharset)
throws FileNotFoundException, IOException {
FileInputStream fis = new FileInputStream(f);
byte[] buffer = new byte[bufferLength];
fis.read(buffer);
fis.close();
CharsetToolkit toolkit = new CharsetToolkit(buffer);
toolkit.setDefaultCharset(defaultCharset);
return toolkit.guessEncoding();
}
public static void main(String[] args) throws FileNotFoundException, IOException {
// File file = new File("utf-8.txt");
File file = new File("windows-1252.txt");
Charset guessedCharset = CharsetToolkit.guessEncoding(file, 4096);
System.err.println("Charset found: " + guessedCharset.displayName());
FileInputStream fis = new FileInputStream(file);
InputStreamReader isr = new InputStreamReader(fis, guessedCharset);
BufferedReader br = new BufferedReader(isr);
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
}