public class Converter
{
  public void registerConverter()
  {
    String jsonString = "{" +
            "  \"id\": \"Calendar\"," +
            "  \"properties\": {" +
            "    \"value\": {" +
            "      \"required\": true," +
            "      \"description\": \"Date in ISO-8601 format\"," +
            "      \"notes\": \"Add any notes you like here\"," +
            "      \"type\": \"string\"," +
            "      \"format\": \"date-time\"" +
            "    }" +
            "  }" +
            "}";
    OverrideConverter converter = new OverrideConverter();
    converter.add("java.util.Calendar", jsonString);
  }
}