OutputStreamWriter

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
/*  ja v  a  2 s . c om*/
public class Main {
  public static void main(String[] args) throws Exception {
    try {
      FileOutputStream fos = new FileOutputStream("test.txt");
      Writer out = new OutputStreamWriter(fos, "UTF8");
      out.write("java2s.com");
      out.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}