[JAVA] [Kotlin] 3 ways to get Class from KClass

The following three types are defined in KClass as properties that return Class.

Taking the ╩╗Int type of Kotlin` as an example, the returned contents are as follows.

.java .javaObjectType .javaPrimitiveType
Int::class int.class Integer.class int.class
Integer::class Integer.class Integer.class int.class
Other *.class *.class null

When to care

You will need to use them properly depending on whether you need to distinguish between primitive types and wrapper types. Also, I have followed the pattern of "Implementation that requires Class does not support primitive types ", so in such a case, it is necessary to call .javaObjectType.

Articles that I used as a reference

-[Kotlin 1 \ .0 Beta 4 changes -Qiita](https://qiita.com/mattak/items/ba0e3294d539a86f120f#%E3%81%95%E3%82%89%E3%81%AB% E3% 83% 8F% E3% 82% A4% E3% 83% A9% E3% 82% A4% E3% 83% 88)

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