Java tutorial
import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; public class Converter { public static void main(String args[]) throws Exception { FileInputStream fis = new FileInputStream(new File("input.txt")); BufferedReader in = new BufferedReader(new InputStreamReader(fis, "SJIS")); FileOutputStream fos = new FileOutputStream(new File("output.txt")); BufferedWriter out = new BufferedWriter(new OutputStreamWriter(fos, "UTF8")); int len = 80; char buf[] = new char[len]; int numRead; while ((numRead = in.read(buf, 0, len)) != -1) out.write(buf, 0, numRead); out.close(); in.close(); } }