Link to home
Create AccountLog in
Avatar of bcamacho
bcamachoFlag for United States of America

asked on

Java JSON parsing data

Hello,  I am using Java with GSON. I am having an issue returning values in a organized format.  I want a simple java app to handle parsing data to my classes. When I return values using System.pringln(data2); I seem to obtain unexpected null value for NAME. What do you think the issue is? Why a null value?
<META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW">

Open in new window

<META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW">

Open in new window

import com.google.gson.Gson;

public class ReadJson {

    public static void main(String... args) throws Exception {

	String JSON_STRING = "{\"data\":[{\"NAME\":\"Brandy\",\"LOCATION\":\"Redding, CA\"},{\"NAME\":\"Jacob\",\"LOCATION\":\"Redding, CA\"},{\"NAME\":\"Tatiana\",\"LOCATION\":\"Wonderland\"},{\"NAME\":\"Tedo\",\"LOCATION\":\"Cottonwood\"}]}";

    DataJSON data2 = new Gson().fromJson(JSON_STRING, DataJSON.class);
    System.out.println(data2);
	
    }
}
class DataJSON {
    public String NAME;
    public String LOCATION;
    public String getName() { return NAME; }
    public String getLocation() { return LOCATION;}

    public void setName(String NAME) { this.NAME = NAME; }
    public void setLoction(String LOCATION) { this.LOCATION = LOCATION; }
    public String toString() {
    	return String.format("NAME:%s,LOCATION:%s", NAME, LOCATION);
    }
}

Open in new window

Avatar of leakim971
leakim971
Flag of Guadeloupe image

Your JSON string contain an array/list not a simple DataJSON object.
Use :
import com.google.gson.Gson;

public class ReadJson {

    public static void main(String... args) throws Exception {
		String JSON_STRING = "{\"data\":[{\"NAME\":\"Brandy\",\"LOCATION\":\"Redding, CA\"},{\"NAME\":\"Jacob\",\"LOCATION\":\"Redding, CA\"},{\"NAME\":\"Tatiana\",\"LOCATION\":\"Wonderland\"},{\"NAME\":\"Tedo\",\"LOCATION\":\"Cottonwood\"}]}";
	
	    Data data2 = new Gson().fromJson(JSON_STRING, Data.class);
	    System.out.println(data2.getDataJSON().get(0).toString());
    }
}

Open in new window

And :
import java.util.List;

public class Data {
    private List<DataJSON> data;
    public List<DataJSON> getDataJSON() { return data; }
    public void setDataJSON(List<DataJSON> data) { this.data = data; }
}

Open in new window

And :
public class DataJSON {
    public String NAME;
    public String LOCATION;
    public String getName() { return NAME; }
    public String getLocation() { return LOCATION;}

    public void setName(String NAME) { this.NAME = NAME; }
    public void setLocation(String LOCATION) { this.LOCATION = LOCATION; }
    public String toString() {
    	return String.format("NAME:%s,LOCATION:%s", NAME, LOCATION);
    }
}

Open in new window

ASKER CERTIFIED SOLUTION
Avatar of bcamacho
bcamacho
Flag of United States of America image

Link to home
membership
Create an account to see this answer
Signing up is free. No credit card required.
Create Account
Avatar of bcamacho

ASKER

To long of time has passed from the point I originally ask the question, with a different solution in-place for parsing data there is no need to have this question open.