Below Java Code shows how to read UTF-8 data from a file or read UTF-8 encoded data from a text file-
/****************************************************************************************
* Created on 06-2012 Copyright(c) https://kodehelp.com All Rights Reserved.
****************************************************************************************/
package com.kodehelp.javaio;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
/**
 * Created by https://kodehelp.com Date: 6/9/12
 */
public class ReadUTF8DataFromFile {
    public static void main(String args[]) {
        try {
            File fileDir = new File("c:\\Sample.txt");
            BufferedReader in = new BufferedReader(new InputStreamReader(
                                        new FileInputStream(fileDir), "UTF8"));
            String str;
            while ((str = in.readLine()) != null) {
                System.out.println(str);
            }
            in.close();
        } catch (UnsupportedEncodingException e) {
            System.out.println(e.getMessage());
        } catch (IOException e) {
            System.out.println(e.getMessage());
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}