For example, all the collection classes in the JDK hold data as objects ... JDK version 1.5 introduced a feature known as the autoboxing of Java primitive types. It means that on newer JDKs, a wrapper ...

Primitives have been part of the Java ... types. To illustrate the difference, consider the two declarations below. The first declaration uses a primitive type and the second uses a wrapper class.

The following example uses the Integer wrapper class’ parse method to convert a text String to a long: Note that an instance of the Long wrapper class is different from the lower-case long primitive ...