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Java How to Program, Early Objects, 11th Edition
book

Java How to Program, Early Objects, 11th Edition

by Paul J. Deitel, Harvey Deitel
June 2017
Beginner
1296 pages
69h 23m
English
Pearson
Content preview from Java How to Program, Early Objects, 11th Edition

10.12 private Constructors

In Section 3.4, we mentioned that constructors are normally declared public. Sometimes it’s useful to declare one or more of a class’s constructors as private.

Preventing Object Instantiation

You can prevent client code from creating objects of a class by making the class’s constructors private. For example, consider class Math, which contains only public static constants and public static methods. There’s no need to create a Math object to use the class’s constants and methods, so its constructor is private.

Sharing Initialization Code in Constructors

One common use of a private constructor is sharing initialization code among a class’s other constructors. You can use delegating constructors (introduced in Fig. ...

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Publisher Resources

ISBN: 9780134751962