#75 Types of Interface in Java

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In this lecture we are discussing types of interface:
#1
types of interface
1) Normal interface
2)functional interface /SAM
3)Marker interface
#2
i)Normal interface
Normal interface contains two or more abstract method.
It can have any number of static and default methods and also even public methods of Object classes.
you can declare variable which are public static final by deault
ii)Functional Interface:
Functional Interface is an interface that has only pure one abstract method.
It can have any number of static and default methods and also even public methods of Object classes
e.g Runnable interface : It contains only run() method
iii)
Marker Interface:
An interface that does not contain any methods, fields, Abstract Methods, and any Constants is Called a Marker interface.
Also, if an interface is empty, then it is known as Marker Interface.
The Serializable and the Cloneable interfaces are examples of Marker interfaces.
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[@zr0724]

thank you these short lessons are fun and less frustrating.

[@burakkizilkaya99]

thank you for explanation. best teacher so far

[@samplayz9557]

the king of java

[@241_krunalkhapekar2]

what an explanation sir 🤩

[@revankumar984]

As always, great explanation, thank you!

[@AkshithaAlladi]

Happy teacher's day sir 🎉

[@adityakumar2288]

Question: Java 8 allows default and static methods in the interface. Can we use that in Functional Interface? If yes what is the real-time use case?

[@qkcb]

You can take a look at the Java Comparator interface

[@anisha7909]

No,I don't think so. It should be either abstract or static.Since all methods under interface are abstract.

[@mesmerizeart663]

​@@anisha7909dont say java 8 it's it's 1.8 after sun micro system hand over java to oracle corporation it's name change floating like criteria to 1.8 to only 9,10,11----21.According your question after 1.7v of java you can declare default method and static method inside inter face.

[@anisha7909]

Thank you for the information@@mesmerizeart663

[@maleeshasandakalum6213]

Fantastic sir❤❤

[@shraddhapawar5674]

Best tutorial

[@mesmerizeart663]

Memories theory you can't get a job in industry . I also known the each and every part of java concept theoretically with real world example and every concept related program but when I start coding logic not come to my mind.

[@MELIS_I]

So practice on coding bro 😅

[@harshitismm]

Where is the next video?

[@rwordspecialist6734]

Khaa gye Navin sir

[@md.ikramulislam9708]

#72

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