//Sample04_03.java

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.UnsupportedEncodingException;
import java.io.FileNotFoundException;
import java.io.IOException;

class Sample04_03{
  public static void main(String[] args){

      String path = "hello.txt";
      File file = new File(path);
      StringBuilder strb = null;
      try {
          BufferedReader br = new BufferedReader(
                        new InputStreamReader(
                            new FileInputStream(file), "UTF-8"
                        )
                    );

          strb = new StringBuilder();
          String strLine;
          while((strLine = br.readLine()) != null) {
              strb.append(strLine);
              strb.append("\n");
          }
          br.close();

      } catch (UnsupportedEncodingException e) {
          e.printStackTrace();
      } catch (FileNotFoundException e) {
          e.printStackTrace();
      } catch (IOException e){
          e.printStackTrace();
      }
      if(strb!=null){
          System.out.println(strb.toString());
      }else{
          System.out.println("null");
      }
  }

}