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The class type dynamically assigned to the variable


How does array class work in Java?Java inner class and static nested classFastest way to determine if an integer's square root is an integerJava Class that implements Map and keeps insertion order?Where does the @Transactional annotation belong?How to get a class instance of generics type TDifference between <context:annotation-config> vs <context:component-scan>Error: Could not find or load main classStatic Classes In JavaWhy don't Java's +=, -=, *=, /= compound assignment operators require casting?Is not an enclosing class Java






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2















I'm wrapping an Axis web service in a Springboot microservice and stumbled on some code that does not make sense.



Class cls = AmountInfo[].class;


What class is returned above ?










share|improve this question


























  • Possible duplicate of How does array class work in Java?

    – vincrichaud
    Mar 27 at 16:08











  • That's what would be called the AmountInfo array class, and that's different from the class of AmountInfo

    – ernest_k
    Mar 27 at 16:09











  • By the way int.class is an other exotic class.

    – Joop Eggen
    Mar 27 at 16:10











  • "What class is returned above" - why did not you call "System.out.println(cls.getName())"?

    – Alexei Kaigorodov
    Mar 27 at 17:18

















2















I'm wrapping an Axis web service in a Springboot microservice and stumbled on some code that does not make sense.



Class cls = AmountInfo[].class;


What class is returned above ?










share|improve this question


























  • Possible duplicate of How does array class work in Java?

    – vincrichaud
    Mar 27 at 16:08











  • That's what would be called the AmountInfo array class, and that's different from the class of AmountInfo

    – ernest_k
    Mar 27 at 16:09











  • By the way int.class is an other exotic class.

    – Joop Eggen
    Mar 27 at 16:10











  • "What class is returned above" - why did not you call "System.out.println(cls.getName())"?

    – Alexei Kaigorodov
    Mar 27 at 17:18













2












2








2








I'm wrapping an Axis web service in a Springboot microservice and stumbled on some code that does not make sense.



Class cls = AmountInfo[].class;


What class is returned above ?










share|improve this question
















I'm wrapping an Axis web service in a Springboot microservice and stumbled on some code that does not make sense.



Class cls = AmountInfo[].class;


What class is returned above ?







java compilation






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 27 at 16:07









ernest_k

27k4 gold badges32 silver badges55 bronze badges




27k4 gold badges32 silver badges55 bronze badges










asked Mar 27 at 16:06









VankuisherVankuisher

966 bronze badges




966 bronze badges















  • Possible duplicate of How does array class work in Java?

    – vincrichaud
    Mar 27 at 16:08











  • That's what would be called the AmountInfo array class, and that's different from the class of AmountInfo

    – ernest_k
    Mar 27 at 16:09











  • By the way int.class is an other exotic class.

    – Joop Eggen
    Mar 27 at 16:10











  • "What class is returned above" - why did not you call "System.out.println(cls.getName())"?

    – Alexei Kaigorodov
    Mar 27 at 17:18

















  • Possible duplicate of How does array class work in Java?

    – vincrichaud
    Mar 27 at 16:08











  • That's what would be called the AmountInfo array class, and that's different from the class of AmountInfo

    – ernest_k
    Mar 27 at 16:09











  • By the way int.class is an other exotic class.

    – Joop Eggen
    Mar 27 at 16:10











  • "What class is returned above" - why did not you call "System.out.println(cls.getName())"?

    – Alexei Kaigorodov
    Mar 27 at 17:18
















Possible duplicate of How does array class work in Java?

– vincrichaud
Mar 27 at 16:08





Possible duplicate of How does array class work in Java?

– vincrichaud
Mar 27 at 16:08













That's what would be called the AmountInfo array class, and that's different from the class of AmountInfo

– ernest_k
Mar 27 at 16:09





That's what would be called the AmountInfo array class, and that's different from the class of AmountInfo

– ernest_k
Mar 27 at 16:09













By the way int.class is an other exotic class.

– Joop Eggen
Mar 27 at 16:10





By the way int.class is an other exotic class.

– Joop Eggen
Mar 27 at 16:10













"What class is returned above" - why did not you call "System.out.println(cls.getName())"?

– Alexei Kaigorodov
Mar 27 at 17:18





"What class is returned above" - why did not you call "System.out.println(cls.getName())"?

– Alexei Kaigorodov
Mar 27 at 17:18












1 Answer
1






active

oldest

votes


















1













Here's what the docs of java.lang.Class have to say about this:




Every array also belongs to a class that is reflected as a Class object that is shared by all arrays with the same element type and number of dimensions.




Just as the a Class object for the type AmountInfo, there is a Class for the array 1D array type AmountInfo[], just as there is also a type for the 2D array type AmountInfo[][], etc.



A Class of an array type returns true when isArray() is invoked on it. AmountInfo[].class is equivalent to AmountInfo.class.arrayType(). And you can use it with the reflection API the same way you can use a normal class (example below):



//Creating a 1D array of AmountInfo type
jshell> Array.newInstance(AmountInfo.class, 2)
$65 ==> AmountInfo[2] null, null

// Creating a 2D array of AmountInfo type
jshell> Array.newInstance(AmountInfo[].class, 2)
$66 ==> AmountInfo[2][] null, null





share|improve this answer
























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    1 Answer
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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

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    active

    oldest

    votes









    1













    Here's what the docs of java.lang.Class have to say about this:




    Every array also belongs to a class that is reflected as a Class object that is shared by all arrays with the same element type and number of dimensions.




    Just as the a Class object for the type AmountInfo, there is a Class for the array 1D array type AmountInfo[], just as there is also a type for the 2D array type AmountInfo[][], etc.



    A Class of an array type returns true when isArray() is invoked on it. AmountInfo[].class is equivalent to AmountInfo.class.arrayType(). And you can use it with the reflection API the same way you can use a normal class (example below):



    //Creating a 1D array of AmountInfo type
    jshell> Array.newInstance(AmountInfo.class, 2)
    $65 ==> AmountInfo[2] null, null

    // Creating a 2D array of AmountInfo type
    jshell> Array.newInstance(AmountInfo[].class, 2)
    $66 ==> AmountInfo[2][] null, null





    share|improve this answer





























      1













      Here's what the docs of java.lang.Class have to say about this:




      Every array also belongs to a class that is reflected as a Class object that is shared by all arrays with the same element type and number of dimensions.




      Just as the a Class object for the type AmountInfo, there is a Class for the array 1D array type AmountInfo[], just as there is also a type for the 2D array type AmountInfo[][], etc.



      A Class of an array type returns true when isArray() is invoked on it. AmountInfo[].class is equivalent to AmountInfo.class.arrayType(). And you can use it with the reflection API the same way you can use a normal class (example below):



      //Creating a 1D array of AmountInfo type
      jshell> Array.newInstance(AmountInfo.class, 2)
      $65 ==> AmountInfo[2] null, null

      // Creating a 2D array of AmountInfo type
      jshell> Array.newInstance(AmountInfo[].class, 2)
      $66 ==> AmountInfo[2][] null, null





      share|improve this answer



























        1












        1








        1







        Here's what the docs of java.lang.Class have to say about this:




        Every array also belongs to a class that is reflected as a Class object that is shared by all arrays with the same element type and number of dimensions.




        Just as the a Class object for the type AmountInfo, there is a Class for the array 1D array type AmountInfo[], just as there is also a type for the 2D array type AmountInfo[][], etc.



        A Class of an array type returns true when isArray() is invoked on it. AmountInfo[].class is equivalent to AmountInfo.class.arrayType(). And you can use it with the reflection API the same way you can use a normal class (example below):



        //Creating a 1D array of AmountInfo type
        jshell> Array.newInstance(AmountInfo.class, 2)
        $65 ==> AmountInfo[2] null, null

        // Creating a 2D array of AmountInfo type
        jshell> Array.newInstance(AmountInfo[].class, 2)
        $66 ==> AmountInfo[2][] null, null





        share|improve this answer













        Here's what the docs of java.lang.Class have to say about this:




        Every array also belongs to a class that is reflected as a Class object that is shared by all arrays with the same element type and number of dimensions.




        Just as the a Class object for the type AmountInfo, there is a Class for the array 1D array type AmountInfo[], just as there is also a type for the 2D array type AmountInfo[][], etc.



        A Class of an array type returns true when isArray() is invoked on it. AmountInfo[].class is equivalent to AmountInfo.class.arrayType(). And you can use it with the reflection API the same way you can use a normal class (example below):



        //Creating a 1D array of AmountInfo type
        jshell> Array.newInstance(AmountInfo.class, 2)
        $65 ==> AmountInfo[2] null, null

        // Creating a 2D array of AmountInfo type
        jshell> Array.newInstance(AmountInfo[].class, 2)
        $66 ==> AmountInfo[2][] null, null






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 27 at 16:31









        ernest_kernest_k

        27k4 gold badges32 silver badges55 bronze badges




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