JsonParser is deprecated

Question

Getting deprecated message for JsonParser for Spring Boot app,

JsonObject jsonObject = new JsonParser().parse(result).getAsJsonObject(); 

What is the alternative?

Answer 1

Based on the javadoc for Gson 2.8.6

No need to instantiate this class, use the static methods instead.

and following are the alternatives to be used.

// jsonString is of type java.lang.String JsonObject jsonObject = JsonParser.parseString​(jsonString).getAsJsonObject();  // reader is of type java.io.Reader JsonObject jsonObject = JsonParser.parseReader​(reader).getAsJsonObject();  // jsonReader is of type com.google.gson.stream.JsonReader JsonObject jsonObject = JsonParser.parseReader​(jsonReader).getAsJsonObject(); 

Example

import static org.junit.Assert.assertTrue;  import com.google.gson.JsonObject; import com.google.gson.JsonParser;  public class Test {      public static void main(String[] args) {         String jsonString = "{ \"name\":\"John\"}";          JsonObject jsonObjectAlt = JsonParser.parseString(jsonString).getAsJsonObject();         // Shows deprecated warning for new JsonParser() and parse(jsonString)         JsonObject jsonObject = new JsonParser().parse(jsonString).getAsJsonObject();          assertTrue(jsonObjectAlt.equals(jsonObject));      } }