Addition of 2 number using Java Swing Part 2 ActionListener

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Telusko Hindi :

[Xp-Sam]

Sir at 2:57 how did u do that?
I am using eclipse ide and when I am clicking ctrl+left mouse button it only shows definition of the function

[likith]

Sir plz provide even the complete code in some file after each tutorial than it would be best to learn

[tanishsurana]

Telusko we cannot do multiple inheritance but can we implement multiple interfaces?

Like for e.g.

Class Abc implements ActionListener, Runnable
{

}

[nikunjaggarwal]

why this ActionListener is not mentioned functional interface?

[arveersingh]

what is the significance of this keyword here?

[SingamsettiMohanSaiBCE]

sir how is that actionPerformed working