Examples of autoboxing in Java. For every primitive type, there is a corresponding wrapper class: Integer for int; Character for char; Double for double, and more. Historically, if developers wanted ...

After introducing each operator type, I’ll present an example that shows you how it’s used in Java expressions. Additive operators The additive operators increase or decrease a numeric value ...

Array types in Java are not implicitly contravariant, but they can be explicitly contravariant , just like generic types. I’ll offer some examples later in the article. Type-dependent elements ...

The default constructor in Java initializes primitive types to their binary equivalent of zero and reference types to null. How to use Java's default constructor Although the default constructor in ...

Types of variable in Java A variable that contains a whole number, as in the previous examples, is called an “integer” or “int” for short. However, this is just one type of variable in Java.

An example is String. This is not a primitive type in Java, but rather a reference type: in this case it “points” to a class that can have multiple values and methods.