Java tutorial
import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; public class FileInputOutputExample { public static void main(String[] args) throws Exception { InputStream is = new FileInputStream("in.txt"); OutputStream os = new FileOutputStream("out.txt"); int c; while ((c = is.read()) != -1) { System.out.print((char) c); os.write(c); } is.close(); os.close(); } }