CHAPTER 8

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Wrapper Classes

In this chapter, you will learn:

  • About the wrapper classes and how to use them
  • How primitive values are automatically boxed into wrapper objects when needed
  • How wrapper objects are automatically unboxed into primitive values when needed

Wrapper Classes

In previous chapters, you learned that primitive and reference types are not assignment compatible. You cannot even compare a primitive value with an object reference. Some parts of the Java library work only with objects; for example, collections in Java work only with objects. You cannot create a list of primitive values, such as 1, 3, 8, and 10. You will need to wrap ...

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