visual basic barcode printing 8: Inner Classes in Java

Printing PDF 417 in Java 8: Inner Classes

8: Inner Classes
PDF-417 2d Barcode Reader In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
PDF417 Printer In Java
Using Barcode drawer for Java Control to generate, create PDF 417 image in Java applications.
the sometimes bizarre syntax, and you know how to spot legal and illegal inner class definitions. We looked first at regular inner classes, where one class is a member of another. You learned that coding an inner class means putting the class definition of the inner class inside the curly braces of the enclosing (outer) class, but outside of any method or other code block. We learned that an inner class instance shares a special relationship with a specific instance of the outer class, and that this special relationship lets the inner class access all members of the outer class, including those marked private. You learned that to instantiate an inner class, you must have a reference to an instance of the outer class. Next we looked at method-local inner classes classes defined inside a method. We saw that the code for a method-local inner class looks virtually the same as the code for any other class definition, except that you can t apply an access modifier the way you can to a regular inner class. You also learned why method-local inner classes cannot use nonfinal local variables declared within the same method the inner class instance may outlive the stack frame, so the local variable might vanish while the inner class object is still alive. We showed you that to use the inner class you need to instantiate it, and that the instantiation must come after the class declaration in the method. We also explored the strangest inner class type of all the anonymous inner class. You learned that they come in two forms, normal and argument-local. Normal, ho-hum, anonymous inner classes are created as part of a variable assignment, while argument-local inner classes are actually declared, defined, and automatically instantiated all within the argument to a method! We covered the way anonymous inner classes can be either a subclass of the named class type, or an implementer of the named interface. Finally, we looked at how polymorphism applies to anonymous inner classes: you can invoke on the new instance only those methods defined in the named class or interface type. In other words, even if the anonymous inner class defines it s own new method, no code from anywhere outside the inner class will be able to invoke that method.
Scan PDF417 In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Paint Bar Code In Java
Using Barcode encoder for Java Control to generate, create barcode image in Java applications.
Certification Summary
Bar Code Scanner In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
PDF-417 2d Barcode Generator In Visual C#.NET
Using Barcode encoder for VS .NET Control to generate, create PDF417 image in VS .NET applications.
As if we weren t already having enough fun for one day, we pushed on to static inner classes, which really aren t inner classes at all. Known as static nested classes (or top-level nested classes), a nested class marked with the static modifier is quite similar to any other non-inner class, except that to access it, code must have access to both the nested and enclosing class. We saw that because the class is static, no instance of the enclosing class is needed, and thus the static nested class does not share a special relationship with any instance of the enclosing class. We ve finished the inner class tour, and now it s up to you to review the Two-Minute Drill and take the Self Test. We can virtually guarantee that if you can t answer these questions correctly, you probably can t pass the exam. On the bright side, though, a strong knowledge of inner class syntax and behavior should get you through some of the exam s toughest questions. And did you know that recent studies show that intense mental effort like working on logic puzzles can actually increase the synaptic connections in your brain This chapter s Self-Test qualifies as intense mental effort, and might be covered under some health insurance plans.
Generate PDF-417 2d Barcode In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
PDF 417 Creation In Visual Studio .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in .NET applications.
8: Inner Classes
PDF417 Creator In VB.NET
Using Barcode generation for VS .NET Control to generate, create PDF417 image in VS .NET applications.
EAN-13 Supplement 5 Generator In Java
Using Barcode generator for Java Control to generate, create EAN / UCC - 13 image in Java applications.
TWO-MINUTE DRILL
Creating Code128 In Java
Using Barcode drawer for Java Control to generate, create Code 128 Code Set B image in Java applications.
Linear Barcode Drawer In Java
Using Barcode generator for Java Control to generate, create Linear Barcode image in Java applications.
Here are some of the key points from the certification objectives (which for this chapter, means the four inner class topics).
Leitcode Creator In Java
Using Barcode drawer for Java Control to generate, create Leitcode image in Java applications.
EAN-13 Supplement 5 Creator In Objective-C
Using Barcode maker for iPhone Control to generate, create EAN 13 image in iPhone applications.
Bar Code Generation In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create barcode image in .NET framework applications.
Barcode Recognizer In C#.NET
Using Barcode Control SDK for Visual Studio .NET Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
Generate EAN 128 In Java
Using Barcode maker for Eclipse BIRT Control to generate, create UCC - 12 image in Eclipse BIRT applications.
Bar Code Generation In None
Using Barcode generation for Font Control to generate, create bar code image in Font applications.
Code-128 Creator In Objective-C
Using Barcode maker for iPad Control to generate, create Code 128B image in iPad applications.
Drawing Code39 In Visual C#
Using Barcode printer for .NET framework Control to generate, create Code 39 image in .NET framework applications.
Copyright © OnBarcode.com . All rights reserved.