Is JsonElement integer or float?










1















Is it possible to determine whether a GSON JsonElement instance is an integer or is it a float?



I'm able to determine whether it's a number:



JsonElement value = ...
boolean isNumber = value.getAsJsonPrimitive().isNumber();


But how to determine if it's an integer or a float, so I can subsequently use the correct conversion method? Either



float f = value.getAsJsonPrimitive().getAsFloat();


or



int i = value.getAsJsonPrimitive().getAsInt();


Edit: The other question may answer why this may be not implemented in GSON, but this question definitely isn't its duplicate.










share|improve this question



















  • 2





    Possible duplicate of How to prevent Gson from expressing integers as floats

    – lucidbrot
    Nov 13 '18 at 15:03











  • @lucidbrot I don't see how this is a duplicate.

    – yper
    Nov 13 '18 at 15:09











  • quoting: "Since JSON doesn't distinguish between integer and floating point fields Gson has to default to Float/Double for numeric fields.". Sounds to me like exactly what you're asking about

    – lucidbrot
    Nov 13 '18 at 15:15











  • @lucidbrot I see this answer as being orthogonal to my question. Whatever the way Gson defaults numbers, there could be a way of it answering whether the number essentially "contains a dot" or not.

    – yper
    Nov 13 '18 at 16:29












  • Okay, then great you've clarified that it's not a dupe

    – lucidbrot
    Nov 13 '18 at 16:33















1















Is it possible to determine whether a GSON JsonElement instance is an integer or is it a float?



I'm able to determine whether it's a number:



JsonElement value = ...
boolean isNumber = value.getAsJsonPrimitive().isNumber();


But how to determine if it's an integer or a float, so I can subsequently use the correct conversion method? Either



float f = value.getAsJsonPrimitive().getAsFloat();


or



int i = value.getAsJsonPrimitive().getAsInt();


Edit: The other question may answer why this may be not implemented in GSON, but this question definitely isn't its duplicate.










share|improve this question



















  • 2





    Possible duplicate of How to prevent Gson from expressing integers as floats

    – lucidbrot
    Nov 13 '18 at 15:03











  • @lucidbrot I don't see how this is a duplicate.

    – yper
    Nov 13 '18 at 15:09











  • quoting: "Since JSON doesn't distinguish between integer and floating point fields Gson has to default to Float/Double for numeric fields.". Sounds to me like exactly what you're asking about

    – lucidbrot
    Nov 13 '18 at 15:15











  • @lucidbrot I see this answer as being orthogonal to my question. Whatever the way Gson defaults numbers, there could be a way of it answering whether the number essentially "contains a dot" or not.

    – yper
    Nov 13 '18 at 16:29












  • Okay, then great you've clarified that it's not a dupe

    – lucidbrot
    Nov 13 '18 at 16:33













1












1








1








Is it possible to determine whether a GSON JsonElement instance is an integer or is it a float?



I'm able to determine whether it's a number:



JsonElement value = ...
boolean isNumber = value.getAsJsonPrimitive().isNumber();


But how to determine if it's an integer or a float, so I can subsequently use the correct conversion method? Either



float f = value.getAsJsonPrimitive().getAsFloat();


or



int i = value.getAsJsonPrimitive().getAsInt();


Edit: The other question may answer why this may be not implemented in GSON, but this question definitely isn't its duplicate.










share|improve this question
















Is it possible to determine whether a GSON JsonElement instance is an integer or is it a float?



I'm able to determine whether it's a number:



JsonElement value = ...
boolean isNumber = value.getAsJsonPrimitive().isNumber();


But how to determine if it's an integer or a float, so I can subsequently use the correct conversion method? Either



float f = value.getAsJsonPrimitive().getAsFloat();


or



int i = value.getAsJsonPrimitive().getAsInt();


Edit: The other question may answer why this may be not implemented in GSON, but this question definitely isn't its duplicate.







java gson






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 13 '18 at 15:08







yper

















asked Nov 13 '18 at 15:00









yperyper

2,49242535




2,49242535







  • 2





    Possible duplicate of How to prevent Gson from expressing integers as floats

    – lucidbrot
    Nov 13 '18 at 15:03











  • @lucidbrot I don't see how this is a duplicate.

    – yper
    Nov 13 '18 at 15:09











  • quoting: "Since JSON doesn't distinguish between integer and floating point fields Gson has to default to Float/Double for numeric fields.". Sounds to me like exactly what you're asking about

    – lucidbrot
    Nov 13 '18 at 15:15











  • @lucidbrot I see this answer as being orthogonal to my question. Whatever the way Gson defaults numbers, there could be a way of it answering whether the number essentially "contains a dot" or not.

    – yper
    Nov 13 '18 at 16:29












  • Okay, then great you've clarified that it's not a dupe

    – lucidbrot
    Nov 13 '18 at 16:33












  • 2





    Possible duplicate of How to prevent Gson from expressing integers as floats

    – lucidbrot
    Nov 13 '18 at 15:03











  • @lucidbrot I don't see how this is a duplicate.

    – yper
    Nov 13 '18 at 15:09











  • quoting: "Since JSON doesn't distinguish between integer and floating point fields Gson has to default to Float/Double for numeric fields.". Sounds to me like exactly what you're asking about

    – lucidbrot
    Nov 13 '18 at 15:15











  • @lucidbrot I see this answer as being orthogonal to my question. Whatever the way Gson defaults numbers, there could be a way of it answering whether the number essentially "contains a dot" or not.

    – yper
    Nov 13 '18 at 16:29












  • Okay, then great you've clarified that it's not a dupe

    – lucidbrot
    Nov 13 '18 at 16:33







2




2





Possible duplicate of How to prevent Gson from expressing integers as floats

– lucidbrot
Nov 13 '18 at 15:03





Possible duplicate of How to prevent Gson from expressing integers as floats

– lucidbrot
Nov 13 '18 at 15:03













@lucidbrot I don't see how this is a duplicate.

– yper
Nov 13 '18 at 15:09





@lucidbrot I don't see how this is a duplicate.

– yper
Nov 13 '18 at 15:09













quoting: "Since JSON doesn't distinguish between integer and floating point fields Gson has to default to Float/Double for numeric fields.". Sounds to me like exactly what you're asking about

– lucidbrot
Nov 13 '18 at 15:15





quoting: "Since JSON doesn't distinguish between integer and floating point fields Gson has to default to Float/Double for numeric fields.". Sounds to me like exactly what you're asking about

– lucidbrot
Nov 13 '18 at 15:15













@lucidbrot I see this answer as being orthogonal to my question. Whatever the way Gson defaults numbers, there could be a way of it answering whether the number essentially "contains a dot" or not.

– yper
Nov 13 '18 at 16:29






@lucidbrot I see this answer as being orthogonal to my question. Whatever the way Gson defaults numbers, there could be a way of it answering whether the number essentially "contains a dot" or not.

– yper
Nov 13 '18 at 16:29














Okay, then great you've clarified that it's not a dupe

– lucidbrot
Nov 13 '18 at 16:33





Okay, then great you've clarified that it's not a dupe

– lucidbrot
Nov 13 '18 at 16:33












3 Answers
3






active

oldest

votes


















-1














use something like, and so if return json object is an instance of float or integer you can then apply the required get:



JSONObject jObj = new JSONObject(jString);
Object aObj = jObj.get("a");
if(aObj instanceof Integer)
System.out.println(aObj);






share|improve this answer























  • This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

    – yper
    Nov 13 '18 at 16:41











  • This is a direct copy from here. At least link give credit to the original answer

    – Eamon Scullion
    Nov 13 '18 at 17:02












  • Additionally, this answer uses org.json.simple.* and not Gson.

    – yper
    Nov 13 '18 at 17:14


















-1














The only way I've found so far is using regex on a string:



if (value.getAsJsonPrimitive().isNumber()) 
String num = value.getAsString();
boolean isFloat = num.matches("[-+]?[0-9]*\.[0-9]+");
if (isFloat)
System.out.println("FLOAT");
else
System.out.println("INTEGER");



This correctly determines 123 as integer, and both 123.45 and 123.0 as floats.






share|improve this answer






























    -1














    From GSON API docs:




    Class JsonElement

    ...

    A class representing an element of Json. It could either be a JsonObject, a JsonArray, a JsonPrimitive or a JsonNull.




    and for example:




    getAsInt()

    convenience method to get this element as a primitive integer value.




    JsonElement is not either int or float. You just have the methods to get the value in it somehow casted to some object / primitive.



    So your question might better set to something like



    Howto check if JsonElement value can be constructed as int or as float



    or something like that.



    Short answer: it is possible but you need to do it by yourself by checking if from value can be constructed something you need, like other answers suggest.



    Gson can not know (of course it can try to guess) what is the type of the object some name holds in JSON. It could be also DateTime serialize to ticks.



    Whern using gson.fromJson(...) I would register type adapter like:



    JsonDeserializer<Number> numDeserializer = new JsonDeserializer<Number>() 
    @Override
    public Number deserialize(JsonElement json, Type typeOfT
    ,JsonDeserializationContext context) throws JsonParseException
    try
    return new Integer(json.getAsString());
    catch (NumberFormatException nfe)
    return json.getAsFloat();


    ;


    and have the corresponding field be Number in my class where i deserialze it.
    or if using JsonParser put similar try catch -block or helper method alike.



    But of course these are just some use cases / possibilities.






    share|improve this answer

























    • This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

      – yper
      Nov 13 '18 at 16:49











    • @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

      – pirho
      Nov 13 '18 at 17:01












    • getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

      – yper
      Nov 13 '18 at 17:10











    • Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

      – pirho
      Nov 13 '18 at 17:12












    • I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

      – yper
      Nov 13 '18 at 17:16










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    3 Answers
    3






    active

    oldest

    votes








    3 Answers
    3






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    -1














    use something like, and so if return json object is an instance of float or integer you can then apply the required get:



    JSONObject jObj = new JSONObject(jString);
    Object aObj = jObj.get("a");
    if(aObj instanceof Integer)
    System.out.println(aObj);






    share|improve this answer























    • This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

      – yper
      Nov 13 '18 at 16:41











    • This is a direct copy from here. At least link give credit to the original answer

      – Eamon Scullion
      Nov 13 '18 at 17:02












    • Additionally, this answer uses org.json.simple.* and not Gson.

      – yper
      Nov 13 '18 at 17:14















    -1














    use something like, and so if return json object is an instance of float or integer you can then apply the required get:



    JSONObject jObj = new JSONObject(jString);
    Object aObj = jObj.get("a");
    if(aObj instanceof Integer)
    System.out.println(aObj);






    share|improve this answer























    • This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

      – yper
      Nov 13 '18 at 16:41











    • This is a direct copy from here. At least link give credit to the original answer

      – Eamon Scullion
      Nov 13 '18 at 17:02












    • Additionally, this answer uses org.json.simple.* and not Gson.

      – yper
      Nov 13 '18 at 17:14













    -1












    -1








    -1







    use something like, and so if return json object is an instance of float or integer you can then apply the required get:



    JSONObject jObj = new JSONObject(jString);
    Object aObj = jObj.get("a");
    if(aObj instanceof Integer)
    System.out.println(aObj);






    share|improve this answer













    use something like, and so if return json object is an instance of float or integer you can then apply the required get:



    JSONObject jObj = new JSONObject(jString);
    Object aObj = jObj.get("a");
    if(aObj instanceof Integer)
    System.out.println(aObj);







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered Nov 13 '18 at 15:09









    Ptyler649Ptyler649

    841




    841












    • This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

      – yper
      Nov 13 '18 at 16:41











    • This is a direct copy from here. At least link give credit to the original answer

      – Eamon Scullion
      Nov 13 '18 at 17:02












    • Additionally, this answer uses org.json.simple.* and not Gson.

      – yper
      Nov 13 '18 at 17:14

















    • This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

      – yper
      Nov 13 '18 at 16:41











    • This is a direct copy from here. At least link give credit to the original answer

      – Eamon Scullion
      Nov 13 '18 at 17:02












    • Additionally, this answer uses org.json.simple.* and not Gson.

      – yper
      Nov 13 '18 at 17:14
















    This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

    – yper
    Nov 13 '18 at 16:41





    This does not work since jObj.get("a") returns JsonElement which is never Integer or Float (i.e. Integer is not a child of JsonElement).

    – yper
    Nov 13 '18 at 16:41













    This is a direct copy from here. At least link give credit to the original answer

    – Eamon Scullion
    Nov 13 '18 at 17:02






    This is a direct copy from here. At least link give credit to the original answer

    – Eamon Scullion
    Nov 13 '18 at 17:02














    Additionally, this answer uses org.json.simple.* and not Gson.

    – yper
    Nov 13 '18 at 17:14





    Additionally, this answer uses org.json.simple.* and not Gson.

    – yper
    Nov 13 '18 at 17:14













    -1














    The only way I've found so far is using regex on a string:



    if (value.getAsJsonPrimitive().isNumber()) 
    String num = value.getAsString();
    boolean isFloat = num.matches("[-+]?[0-9]*\.[0-9]+");
    if (isFloat)
    System.out.println("FLOAT");
    else
    System.out.println("INTEGER");



    This correctly determines 123 as integer, and both 123.45 and 123.0 as floats.






    share|improve this answer



























      -1














      The only way I've found so far is using regex on a string:



      if (value.getAsJsonPrimitive().isNumber()) 
      String num = value.getAsString();
      boolean isFloat = num.matches("[-+]?[0-9]*\.[0-9]+");
      if (isFloat)
      System.out.println("FLOAT");
      else
      System.out.println("INTEGER");



      This correctly determines 123 as integer, and both 123.45 and 123.0 as floats.






      share|improve this answer

























        -1












        -1








        -1







        The only way I've found so far is using regex on a string:



        if (value.getAsJsonPrimitive().isNumber()) 
        String num = value.getAsString();
        boolean isFloat = num.matches("[-+]?[0-9]*\.[0-9]+");
        if (isFloat)
        System.out.println("FLOAT");
        else
        System.out.println("INTEGER");



        This correctly determines 123 as integer, and both 123.45 and 123.0 as floats.






        share|improve this answer













        The only way I've found so far is using regex on a string:



        if (value.getAsJsonPrimitive().isNumber()) 
        String num = value.getAsString();
        boolean isFloat = num.matches("[-+]?[0-9]*\.[0-9]+");
        if (isFloat)
        System.out.println("FLOAT");
        else
        System.out.println("INTEGER");



        This correctly determines 123 as integer, and both 123.45 and 123.0 as floats.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 13 '18 at 17:07









        yperyper

        2,49242535




        2,49242535





















            -1














            From GSON API docs:




            Class JsonElement

            ...

            A class representing an element of Json. It could either be a JsonObject, a JsonArray, a JsonPrimitive or a JsonNull.




            and for example:




            getAsInt()

            convenience method to get this element as a primitive integer value.




            JsonElement is not either int or float. You just have the methods to get the value in it somehow casted to some object / primitive.



            So your question might better set to something like



            Howto check if JsonElement value can be constructed as int or as float



            or something like that.



            Short answer: it is possible but you need to do it by yourself by checking if from value can be constructed something you need, like other answers suggest.



            Gson can not know (of course it can try to guess) what is the type of the object some name holds in JSON. It could be also DateTime serialize to ticks.



            Whern using gson.fromJson(...) I would register type adapter like:



            JsonDeserializer<Number> numDeserializer = new JsonDeserializer<Number>() 
            @Override
            public Number deserialize(JsonElement json, Type typeOfT
            ,JsonDeserializationContext context) throws JsonParseException
            try
            return new Integer(json.getAsString());
            catch (NumberFormatException nfe)
            return json.getAsFloat();


            ;


            and have the corresponding field be Number in my class where i deserialze it.
            or if using JsonParser put similar try catch -block or helper method alike.



            But of course these are just some use cases / possibilities.






            share|improve this answer

























            • This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

              – yper
              Nov 13 '18 at 16:49











            • @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

              – pirho
              Nov 13 '18 at 17:01












            • getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

              – yper
              Nov 13 '18 at 17:10











            • Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

              – pirho
              Nov 13 '18 at 17:12












            • I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

              – yper
              Nov 13 '18 at 17:16















            -1














            From GSON API docs:




            Class JsonElement

            ...

            A class representing an element of Json. It could either be a JsonObject, a JsonArray, a JsonPrimitive or a JsonNull.




            and for example:




            getAsInt()

            convenience method to get this element as a primitive integer value.




            JsonElement is not either int or float. You just have the methods to get the value in it somehow casted to some object / primitive.



            So your question might better set to something like



            Howto check if JsonElement value can be constructed as int or as float



            or something like that.



            Short answer: it is possible but you need to do it by yourself by checking if from value can be constructed something you need, like other answers suggest.



            Gson can not know (of course it can try to guess) what is the type of the object some name holds in JSON. It could be also DateTime serialize to ticks.



            Whern using gson.fromJson(...) I would register type adapter like:



            JsonDeserializer<Number> numDeserializer = new JsonDeserializer<Number>() 
            @Override
            public Number deserialize(JsonElement json, Type typeOfT
            ,JsonDeserializationContext context) throws JsonParseException
            try
            return new Integer(json.getAsString());
            catch (NumberFormatException nfe)
            return json.getAsFloat();


            ;


            and have the corresponding field be Number in my class where i deserialze it.
            or if using JsonParser put similar try catch -block or helper method alike.



            But of course these are just some use cases / possibilities.






            share|improve this answer

























            • This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

              – yper
              Nov 13 '18 at 16:49











            • @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

              – pirho
              Nov 13 '18 at 17:01












            • getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

              – yper
              Nov 13 '18 at 17:10











            • Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

              – pirho
              Nov 13 '18 at 17:12












            • I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

              – yper
              Nov 13 '18 at 17:16













            -1












            -1








            -1







            From GSON API docs:




            Class JsonElement

            ...

            A class representing an element of Json. It could either be a JsonObject, a JsonArray, a JsonPrimitive or a JsonNull.




            and for example:




            getAsInt()

            convenience method to get this element as a primitive integer value.




            JsonElement is not either int or float. You just have the methods to get the value in it somehow casted to some object / primitive.



            So your question might better set to something like



            Howto check if JsonElement value can be constructed as int or as float



            or something like that.



            Short answer: it is possible but you need to do it by yourself by checking if from value can be constructed something you need, like other answers suggest.



            Gson can not know (of course it can try to guess) what is the type of the object some name holds in JSON. It could be also DateTime serialize to ticks.



            Whern using gson.fromJson(...) I would register type adapter like:



            JsonDeserializer<Number> numDeserializer = new JsonDeserializer<Number>() 
            @Override
            public Number deserialize(JsonElement json, Type typeOfT
            ,JsonDeserializationContext context) throws JsonParseException
            try
            return new Integer(json.getAsString());
            catch (NumberFormatException nfe)
            return json.getAsFloat();


            ;


            and have the corresponding field be Number in my class where i deserialze it.
            or if using JsonParser put similar try catch -block or helper method alike.



            But of course these are just some use cases / possibilities.






            share|improve this answer















            From GSON API docs:




            Class JsonElement

            ...

            A class representing an element of Json. It could either be a JsonObject, a JsonArray, a JsonPrimitive or a JsonNull.




            and for example:




            getAsInt()

            convenience method to get this element as a primitive integer value.




            JsonElement is not either int or float. You just have the methods to get the value in it somehow casted to some object / primitive.



            So your question might better set to something like



            Howto check if JsonElement value can be constructed as int or as float



            or something like that.



            Short answer: it is possible but you need to do it by yourself by checking if from value can be constructed something you need, like other answers suggest.



            Gson can not know (of course it can try to guess) what is the type of the object some name holds in JSON. It could be also DateTime serialize to ticks.



            Whern using gson.fromJson(...) I would register type adapter like:



            JsonDeserializer<Number> numDeserializer = new JsonDeserializer<Number>() 
            @Override
            public Number deserialize(JsonElement json, Type typeOfT
            ,JsonDeserializationContext context) throws JsonParseException
            try
            return new Integer(json.getAsString());
            catch (NumberFormatException nfe)
            return json.getAsFloat();


            ;


            and have the corresponding field be Number in my class where i deserialze it.
            or if using JsonParser put similar try catch -block or helper method alike.



            But of course these are just some use cases / possibilities.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited Nov 13 '18 at 17:36

























            answered Nov 13 '18 at 16:31









            pirhopirho

            4,065101830




            4,065101830












            • This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

              – yper
              Nov 13 '18 at 16:49











            • @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

              – pirho
              Nov 13 '18 at 17:01












            • getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

              – yper
              Nov 13 '18 at 17:10











            • Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

              – pirho
              Nov 13 '18 at 17:12












            • I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

              – yper
              Nov 13 '18 at 17:16

















            • This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

              – yper
              Nov 13 '18 at 16:49











            • @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

              – pirho
              Nov 13 '18 at 17:01












            • getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

              – yper
              Nov 13 '18 at 17:10











            • Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

              – pirho
              Nov 13 '18 at 17:12












            • I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

              – yper
              Nov 13 '18 at 17:16
















            This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

            – yper
            Nov 13 '18 at 16:49





            This doesn't work. Doing getAsInt() on a JsonElement that is a float 123.45, does not throw but insteads returns an integer 123.

            – yper
            Nov 13 '18 at 16:49













            @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

            – pirho
            Nov 13 '18 at 17:01






            @yper Well, what can I say. I have Gson v2.8.5 and get java.lang.NumberFormatException: For input string: "2.0", for example. Maybe it behaves differently outside of JsonAdapter. Anyway my point in aswer is elsewhere. Having my GSON not lenient also.

            – pirho
            Nov 13 '18 at 17:01














            getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

            – yper
            Nov 13 '18 at 17:10





            getAsInt() doesn't throw in my environment, which is Gson 2.7, Java 1.7, Linux.

            – yper
            Nov 13 '18 at 17:10













            Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

            – pirho
            Nov 13 '18 at 17:12






            Ok, I'll try with 2.7.(0?) just to see if there is any difference. BTW: based on your answer you are actually asking something that is not in any way tightly coupled to GSON but just a String rexgexp... And there are so many of those questions with answers in SO.

            – pirho
            Nov 13 '18 at 17:12














            I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

            – yper
            Nov 13 '18 at 17:16





            I've used regex as a last resort, I'm happy to accept a better answer that uses "pure" Gson / Java and actually works.

            – yper
            Nov 13 '18 at 17:16

















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