Determine encoding from byte array or any input stream.

FindEncoding.java

/*
 * Download "UniversalDetector" from here: https://code.google.com/p/juniversalchardet/
 */

public class FindEncoding {
  private FindEncoding(){}

	public static String findEncoding(byte[] bytes) {
		UniversalDetector detector = new UniversalDetector(null);
		detector.handleData(bytes, 0, bytes.length);
		detector.dataEnd();
		return detector.getDetectedCharset();
	}

	public static String findEncoding(InputStream stream) throws IOException {
		byte[] buf = new byte[4096];
		int nread;

		UniversalDetector detector = new UniversalDetector(null);
		while ((nread = stream.read(buf)) > 0 && !detector.isDone()) {
			detector.handleData(buf, 0, nread);
		}
		detector.dataEnd();
		return detector.getDetectedCharset();
	}
}