Get JSONParser Default Settings Using Jackson in Java

All the default settings of JSON Parser can be represented using the JsonParser.Feature enumeration. The JsonParser.Feature.values() will return all the features that are available for JSONParser but whether a feature is enabled or disabled for a particular parser can be determined using the isEnabled() method of JsonParser. 

Syntax

public static enum JsonParser.Feature extends Enum<JsonParser.Feature>

Example

import com.fasterxml.jackson.core.*;
import java.io.*;
public class JsonParserSettingsTest {
   public static void main(String[] args) throws IOException {
      String json = "[{\"name\":\"Adithya\", \"age\":\"30\"}," + "{\"name\":\"Ravi\", \"age\":\"35\"}]";
      JsonFactory jsonFactory = new JsonFactory();
      JsonParser jsonParser = jsonFactory.createParser(json);
      for(JsonParser.Feature feature : JsonParser.Feature.values()) {
         System.out.println(feature.name() + ":" + jsonParser.isEnabled(feature));
      }
   }
}

Output

AUTO_CLOSE_SOURCE:true
ALLOW_COMMENTS:false
ALLOW_YAML_COMMENTS:false
ALLOW_UNQUOTED_FIELD_NAMES:false
ALLOW_SINGLE_QUOTES:false
ALLOW_UNQUOTED_CONTROL_CHARS:false
ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER:false
ALLOW_NUMERIC_LEADING_ZEROS:false
ALLOW_NON_NUMERIC_NUMBERS:false
ALLOW_MISSING_VALUES:false
ALLOW_TRAILING_COMMA:false
STRICT_DUPLICATE_DETECTION:false
IGNORE_UNDEFINED:false
INCLUDE_SOURCE_IN_LOCATION:true