![]() ![]() ![]() AnyĪny in Kotlin is on the top of the hierarchy. Note that Nothing is a subtype of Unit, that's why the first compile but not the last one. In Kotlin we can’t use the classic Mockito dependency of Java, because there are some limits, for example in my first experiment I have encountered these error when I tried to mock my own. Or, if you prefer, is the result value of any statement (for example println()). Contribute to Kotlin/kotlin-examples development by creating an account on GitHub. The Unit type in Kotlin is the equivalent to the void type in Java. We will look in detail at Unit, Nothing, and Any, and compare against their Java corresponding classes.įinally, we also consider null and how types ending with ? fit into these categories. To take full advantage of the Kotlin Type Hierarchy, it is essential to understand how these three special types work. It is also quite close to the Java Type System, so the interoperability is excellent.ĥ Things You Will Like in Kotlin as a Java Developer One of the reasons is its Type Hierarchy, which is both very easy to work with and extremely powerful. It should be apparent, even to the casual reader of this blog, that I really like Kotlin as a language. String of pearls How to Take Advantage of Kotlin Special Types ![]()
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