Comparing String against JSON.getString

Question

I'm a little bit stuck on this one. I'm trying to compare a String against a jsonobject.getString and it seems whatever I do they do not match:

String date = scoreJson.getString("Date");
if (dateString.equals(date))
{
    //do stuff
}

The value of dateString is assigned here:

calendar = Calendar.getInstance();
int day = calendar.get(calendar.DAY_OF_MONTH), month = calendar.get(calendar.MONTH), year = calendar.get(calendar.YEAR);

//months start at 0 in calendar
month += 1;

//use builder to create the dateString
builder.append(year).append("-").append(month).append("-").append(day);
dateString = builder.toString();

When I view both Strings in debug they show "2015-05-18", however they will not match in a conditional statement. Does anyone have any idea why, and how I could compare them?

Thanks.

Edit: The JSON object will come back in this format:

{"ScoreData":{"Username":"testUser","Id":"8fb25209-863a-410b-a440-
b5b57a903ee1","Date":"2015-02-25","Score":"25.3"}}

I am retrieving the values from it here and saving to sharedprefs:

//response comes back as two JSONObjects, this makes the inner object into a new JSON
JSONObject responseJson = new JSONObject(response);

JSONObject scoreJson = new JSONObject(responseJson.getString("ScoreData"));

String date = scoreJson.getString("Date");
puzzleScore = scoreJson.getString("Score");

SharedPreferencesWrapper.saveToPrefs(c, "score-" + date, puzzleScore);

I am then checking for the key here:

puzzleScore = SharedPreferencesWrapper.getFromPrefs(c, "score-" + dateString, "NotFound");

if (!puzzleScore.contains("NotFound"))
{
    //do stuff
}

Maybe you have non-printable characters in the string. Also why not compare Date instances instead? — Alexis C.
– Alexis C., Commented May 18, 2015 at 21:03
Json strings include " so try replaceAll("\"", "") before comparing. — user
– user, Commented May 18, 2015 at 21:04
@AlexisC. Hmm it's possible, I'm using String compares because the place in my code where I need to compare them is to retrieve an item from sharedpreferences, for example: code SharedPreferencesWrapper.saveToPrefs(c, "score-" + date, puzzleScore); code puzzleScore = SharedPreferencesWrapper.getFromPrefs(c, "score-" + dateString, "NotFound"); — JasperMoneyshot
– JasperMoneyshot, Commented May 18, 2015 at 21:07
Comparing equality by toString() representation is ugly. toString() is usually used for representation, not comaprison. Better idea is to parse date obtained from JSON to Calendar and compare Calendar objects. — Filip Malczak
– Filip Malczak, Commented May 18, 2015 at 21:10
@FilipMalczak. Unfortunately I can't parse to a date as I need the two Strings to match to pull the key from sharedpreferences. — JasperMoneyshot
– JasperMoneyshot, Commented May 18, 2015 at 21:16

reidzeibel · Accepted Answer · 2015-06-15 08:03:25Z

1

Have you tried adding toString() after this scoreJson.getString("Date"), so the code would be like scoreJson.getString("Date").toString().

I think it is a problem with encoding. If that doesn't work, check for whitespaces around the string. You can remove starting & trailing whitespaces with trim().

Hope this helps, good luck~

answered Jun 15, 2015 at 8:03

reidzeibel

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