Android Development with Kotlin

Safe/unsafe cast operator

In strongly typed languages, such as Java or Kotlin, we need to convert values from one type to another explicitly using the cast operator. A typical casting operation is taking an object of one particular type and turning it into another object type that is its supertype (upcasting), subtype (downcasting), or interface. Let's start with a small reminder of casting that can be performed in Java:

    Fragment fragment = new ProductFragment(); 
    ProductFragment productFragment = (ProductFragment) fragment; 

In the preceding example, there is an instance of ProductFragment that is assigned to a variable storing the Fragment data type. To be able to store this data in the productFragment variable that can store only the ...