try {
  int maxHeaderSize = 4096;
  int maxHeaderTableSize = 4096;
  byte[] name = "name".getBytes();
  byte[] value = "value".getBytes();
  boolean sensitive = false;

  ByteArrayOutputStream out = new ByteArrayOutputStream();

  // encode header list into header block
  Encoder encoder = new Encoder(maxHeaderTableSize);
  encoder.encodeHeader(out, name, value, sensitive);

  ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());

  HeaderListener listener = new HeaderListener() {
    @Override
    public void addHeader(byte[] name, byte[] value, boolean sensitive) {
      // handle header field
    }
  };

  // decode header list from header block
  Decoder decoder = new Decoder(maxHeaderSize, maxHeaderTableSize);
  decoder.decode(in, listener);
  decoder.endHeaderBlock();
} catch (IOException e) {
  // handle exception
}