![]() ![]() Here list will be inferred as List> which is an intersection type. ![]() It's not so obvious from a simple example but considers where a method returns a complex list type which requires a lot of angle brackets and generics to declare the type, this really saves time in those case: For example, var name = "Java" is ok but then name = 3 is not ok.Īs Sander Mak puts in his Pluralsight course What's New in Java 10 this is one of the most eye-catching features of Java 10 which reduces the amount of boilerplate code needed to declare local variables in Java. variables inside methods or code blocks, you cannot use it for member variable declaration inside the class body.Īnd, finally, it doesn't make Java a dynamically typed language like Python, Java is still a statically typed language and once the type is assigned you cannot change it. ![]() I don't know how useful this will be as I am quite used to seeing int i =0 or String name = "Java" and I liked the type information present in the variable declaration line but looks like Java is going the way Scala and Kotlin are and trying to incorporate changes from there.Īlso, note that the var keyword can only be used for local variables i.e. The type will be inferred from context for example when you say var name = "Java" then compile will already know the type is String. Similar to Javascript, Kotlin, and Scala, now Java will also have a var keyword that allows you to declare a local variable without specifying its type. Here is a quick note on those new Java 10 features:ġ. ![]()
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