Extracts unicode characters less than 0x1F0F1 from a file

UnicodeCharExtract.java

import java.io.*;
import java.nio.CharBuffer;

/**
 * Extracts unicode characters less than 0x1F0F1 from a file.
 * <br />
 * Created for http://www.reddit.com/r/program/comments/1tvh50/request_unicodetxt/
 * <br />
 * Usage: java UnicodeCharExtract path/to/file > output.txt
 * <br />
 * @author reddit.com/u/zkxs Jul 3, 2014
 */
public class UnicodeCharExtract
{	
	private final static String CHARACTER_ENCODING = "UTF-8";
	private final static int BUFFER_SIZE = 1024;
	
	public static void main(String[] args)
	{
		for (String filename : args)
		{
			try
			{
				// horrid sequence of wrappers
				readChars(new BufferedReader(new InputStreamReader(new FileInputStream(filename), CHARACTER_ENCODING)));
			}
			catch (FileNotFoundException | UnsupportedEncodingException e)
			{
				e.printStackTrace();
			}
		}
	}
	
	private static CharBuffer buffer = CharBuffer.allocate(BUFFER_SIZE);
	
	private static void readChars(BufferedReader br)
	{
		try
		{
			while(br.read(buffer) != -1)
			{
				buffer.flip();
				while(buffer.hasRemaining())
				{
					char c = buffer.get();
					if (c > 0x7F && c < 0x1F0F1)
						System.out.print(c);
				}
				buffer.clear();
			}
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}
}