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Java Interface Java tutorials for beginners
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Java Interface | Java tutorials for beginners • About this Video: • This video will explain basics of Java interface with real life example as well as practical example. • Links: • To learn about basics of Java click here 👇 • Java Basics: • Java Tutorials for Beginners | Java c... • Java Abstraction: • • Java Abstraction | Java tutorials for... • Method Overriding: • • Method Overriding in Java | Java Meth... • Notes: • 1) What is Interface? • 2) Uses of Interface. • 3) Syntax • 4) Achive abstraction by interface. • 1) What is Interface? • First, let's understand in real life scenario, • Suppose,you have to make a wooden chair by the help of carpenter. • So for that, first,you will need to give details about chair or we can say specifications about chair to the carpenter and specifications such as suppose, • designOfChair(); • sizedOfChair() ; • applyColor(); • And using this specifications carpenter will make a chair as per your requirement • I .e carpenter will use or implement all these specifications while making chair.. • So, these are the Requirement specification • And these Requirement specifications we can called an interface.. • So if we think technically, • Here, you are a client demanding for wooden chair and carpenter will be a service provider who providing service by implementing all these specifications to make a chair as per your requirement.. • so here we can say , • this interface is work like an agreement or contract • between you and carpenter • I.e between client and service provider.. • So basically, • Interface can be define as : Any agreement or contract between client and service provider. • 2) Uses of Interface: • i)Interface is used to achieve total abstraction. • ii)Interface is used to achieve multiple inheritance. • iii)Interface is used to achieve Loose coupling. • 3) Syntax: • interface Interface Name • { • // constant fields; • // abstract methods; • (features added under • 👇 Java version 8) • // default methods ; • // static methods; • (features added under • 👇Java version 9) • //private methods; • // private static methods; • } • 4) Achive abstraction by interface: • interface User{ • void insertCard(); • void enterPin(); • } • class Test1 implements User { • public void insertCard(){ • System.out.println( Please insert card. ); • } • public void enterPin(){ • System.out.println( Please enter a pin. ); • } • } • class Test { • public static void main(String [ ] args){ • Test1 test1Obj = new Test1(); • test1Obj.insertCard(); • test1Obj.enterPin(); • } • Output: • Please insert card. • Please enter a pin. • #javainterface #interfaceinjava #javainterfacewithnotes #sgturorial #javainterfacewithreallifeexample #javainterfacewithexample #javainterfacenewfeatures
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