Access Integer.class from Kotlin

Question

I have a Java method that accepts Class parameter. I need to pass Integer.class to it, but from Kotlin code. I tried Int::class.java, however this does not work, because int.class is passed to the function. My question is, how do I access Integer.class from Kotlin.

Java

void foo(Class clazz);

Kotlin

foo(Int::class.java) // does not work, int.class gets passed to foo

holi-java · Accepted Answer · 2017-08-11 10:46:22Z

26

You must use the KClass#javaObjectType to get the wrapper type class in Kotlin:

Returns a Java Class instance corresponding to the given KClass instance. In case of primitive types it returns corresponding wrapper classes.

For example:

//                  v--- java.lang.Integer
println(Int::class.javaObjectType)

//                  v--- int
println(Int::class.java)

answered Aug 11, 2017 at 10:46

holi-java

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holi-java Over a year ago

For the more details you can see here.

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