public class FileInputStream extends InputStream {
  private int fd;

  public FileInputStream(String pathname) {
    fd=nativeOpen(pathname.getBytes());
  }

  public FileInputStream(File path) {
    fd=nativeOpen(path.getPath().getBytes());
  }
  public int getfd() {
    return fd;
  }

  private static native int nativeOpen(byte[] filename);
  private static native int nativeRead(int fd, byte[] array, int numBytes);
  private static native void nativeClose(int fd);

  public int read() {
    byte b[]=new byte[1];
    int retval=read(b);
    if (retval==-1)
      return -1;
    return b[0];
  }

  public int read(byte[] b) {
    return nativeRead(fd, b, b.length);
  }

  public void close() {
    nativeClose(fd);
  }
}