A Gson is a library that can be used to parse Java objects to JSON and vice-versa. It can also be used to convert a JSON string to an equivalent Java object. In order to parse java object to JSON or JSON to java object, we need to import com.google.gson package in the Java program.
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We can get all the keys of a JSON object in the below example
import java.util.*;
import com.google.gson.*;<strong>
</strong>import org.json.*;
public class GetJSONAllKeysTest {
public static void main(String[] args) {
String jsonStr = "{\"Raja\":\"Java\", \"Ravi\":\"SAP\", \"Chaitanya\":\"Python\", \"Adithya\":\"Spark\"}";
JsonParser parser = new JsonParser();
JsonElement element = parser.parse(jsonStr);
JsonObject obj = element.getAsJsonObject();
Set<Map.Entry<String, JsonElement>> entries = obj.entrySet();
for(Map.Entry<String, JsonElement> entry: entries) {
System.out.println(entry.getKey());
}
}
}Raja Ravi Chaitanya Adithya
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