Primitive datatypes

JVM has a few so-called built-in primitive datatypes. This is the main reason why Java is not considered a pure OOP language. Variables of these types are not objects and always have a value:

Note that not all JVM languages support the creation of variables of primitive types and follow this modern assumption: everything takes the object approach. We will see that this is usually not a problem as the Java Class Library has wrapper objects that wrap primitive types, and most languages, including Java, automatically use these wrappers when required. This process is called auto-boxing.