Java tutorial
import java.io.FileReader; import java.io.FileWriter; import java.io.Reader; import java.io.Writer; public class FileReaderWriterExample { public static void main(String[] args) throws Exception { Reader r = new FileReader("in.txt"); Writer w = new FileWriter("out.txt"); int c; while ((c = r.read()) != -1) { System.out.print((char) c); w.write(c); } r.close(); w.close(); } }