OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide by Boyarsky Jeanne Selikoff Scott & Scott Selikoff

Author:Boyarsky, Jeanne,Selikoff, Scott & Scott Selikoff
Language: eng
Format: epub
ISBN: 9781118957424
Publisher: John Wiley & Sons, Inc.
Published: 2015-03-30T00:00:00+00:00

Applying Access Modifiers

You already saw that there are four access modifiers: public, private, protected, and default access. We are going to discuss them in order from most restrictive to least restrictive:

private: Only accessible within the same class

default (package private) access: private and other classes in the same package

protected: default access and child classes

public: protected and classes in the other packages

Private Access

Private access is easy. Only code in the same class can call private methods or access private fields.

Before we start, take a look at Figure 4.2. It shows the classes we'll use to explore private and default access. The big boxes are the names of the packages. The smaller boxes inside them are the classes in each package. You can refer back to this figure if you want to quickly see how the classes relate.

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