How to convert scala immutable map to JSON using Java?

Question

I have the following example

scala.collection.immutable.Map<java.lang.String, java.lang.Object> statesMap = scala.collection.immutable.Map("AL" -> "Alabama", "AK" -> "Alaska")

and I need to convert this to JSON using Java.

nineunderground · Accepted Answer · 2017-09-13 10:02:45Z

0

I'd recommend use Google Gson library for it:

In that case, type the following:

Gson gson = new GsonBuilder().serializeNulls().create();
String convertedMap = gson.toJson(statesMap).toString();

answered Sep 13, 2017 at 10:02

nineunderground

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4 Comments

user1870400 Over a year ago

is .toString() necessary since gson.toJson returns a string ?

nineunderground Over a year ago

No. Just thinking for printing and testing it

user1870400 Over a year ago

for some reason it didn't quite work with two lines you posted

nineunderground Over a year ago

Well, I should work for any Object, but maybe I've underestimate Scala. If is inmutable... is it really neccesary scala Object? You can just create ImmutableMap<String, String> using Google guava library. That works for sure

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