java function interface example

Java Interface Programming (3), java Interface Programming This article is my learning notes, welcome to reprint, but please note the Source: http://blog.csdn.net/jesson20121020 In java, components may be placed on forms in different ways than other GUI systems. First, it

Notebook class:Package Cn.fanse;public class Notebook {public void run () {System.out.println (' book Run ');} public void Useusb (USB usb) {Usb.open (); Usb.close ();} }USB Interface:Package Cn.fanse;public interface USB {public void open (); public void close ();USB Interface for Mouse:Package Cn.fanse;public class Mousebyusb implements usb{@Overridepublic Void Open () {System.out.println ("mouse Run

Document directory 1. Let's talk about polymorphism first. 1. Differences between abstract classes and virtual functions (abstract, virtual function) The two words abstract and virtual are a little abstract and confused. In fact, they are easy to differentiate. 1.Abstract: you can modify the members of a class or a class. in addition, the class must be abstract modified before the members can be abstract modified. virtual cannot be used to modify t

Java Language Programming on the computer experiment 4Experimental Purpose :understand the function of interfaces, understand the relationship between interfaces and classes that implement interfaces, master declaration interfaces, declare and use methods for implementing interfaces with a class; common classes in Java language packs and utility packages. Experi

interface compensate for the single inheritance of the class. For example:1 //Serial hard Drive interface2 Public InterfaceSatahddextendsa,b{3 //Number of connection lines4 Public Static Final intConnect_line = 4;5 //Write Data6 Public voidWriteData (String data);7 //Read Data8 PublicString ReadData ();9 }Ten Interfacea{ One Public voida (); A } - Interfaceb{ - Public

public abstractIf it is not written, it is the default.ImplementsImplements is a class that implements an interface with a keyword that is used to implement an abstract method defined in an interface.Java does not have many inheritance, in order to compensate for the shortcomings here, the use of interface.The interface definition in Java is basically a class th

. We even have to be more careful,Must not violate the interface's rules. So why should we use interface?In fact, interface is like an industry standard. A factory (class) can adopt the industry standard (implement Interface), or it can not adopt the industry standard.However, a product that incorporates industry standards will have the following benefits:• Highe

defined as follows: Package java.util; Public interface comparator Description1. If a class implements the comparator interface: it must implement the CompareTo (t O1, T O2) function, but it may not implement the Equals (Object obj) function.Why not implement the Equals (Object obj) function? Because any

System.out.println(u1.equals(u2));// true System.out.println(u1 == u3);// false System.out.println(u1.equals(u3));// true } } The clone () method is awesome. We cloned our object and the execution results were as expected. The addresses of u1 and u3 are different but the content is the same. Part IV Through the above example, we can see that there are two steps to clone an object: 1. Implement the java.

Introduction??This is part of the Java interface Programming, not the focus of network programming, but also a little bit about these two interfaces??Login interface??The login interface you want to end up with????Analysis interface??This

interface to define temporary comparison rules. Both the Comparable interface and Comparator interface are members of the Java Collection framework. Comparable interface: Comparator interface:

probably the only advantage of Java Abstract classes, however, this advantage is very useful. For example, if a new method is added to an abstract class, all its subclasses will get this new method at once, and the Java interface cannot do this, if you add a new method to a Java