Default Method Definition in Interface | Java 8

First feature of java 8

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[saadiyafourie]

I am SO GRATEFUL, thank you very much. Well explained and clarity achieved :)

[kamakshijayaraman]

please make a video on when to use abstract class .when to use interface.

[nikhilratnalikar]

really thanks it helped a lot!!! you are awesome

[malayalitravelsuk]

Why do we do like this :-
List<Integer> numList = new ArrayList<>();
and why not
ArrayList<Integer> numList = new ArrayList<>();

[kritikagupta]

I have 2 questions
1) why we have to define that method in interface only, we can define method inside implemented class only?
like message method with body can be write inside implementation class AndroidPhone, there will be no change in interface then

2) if we want to enhance or add something in default method in implentation class, can we do that?
Can we override default method too?

[avinashkesarla]

If we are able to define methods in the interface itself then what would be the difference between the abstract class which has concrete implementation and interface where we do have default definition of the method!

[saikumar-kkkh]

what about static method in Interface? do video for also??

[rupalipatil]

Is default is only keyword ...or it's access modifier is also default ?

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[crazyvideos]

Why we are not declared that call method as default that is also by default public/abstract

[Raj_Gada]

if 2 interfaces have same method names but do different functions and a class implements both the interfaces then which method will it call

[adarshverma]

here default is a keyword or an access specifier ?

[dhoniramakrishna]

sir if u override object class methods in interface we will get compile time error ?

[sairawadwa]

Sir can we use instance variables in default interface.??

[justfeelit]

Can we have more than one default methods in interface? if default method we are defining in the interface it seems like same in the abstract class, what would be the difference between interface and abstract class in java8

[asennikolaev]

how you comment 4 rows at the same time, and how you uncomment them ?