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is JApplet an instance of ActionListner according to this code?

Anil Deshpande
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Joined: Jan 13, 2008
Posts: 119
This is a code which demonstrates the use of JRadioButton



At line number 35,39 and 43, they write a code
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);

My class itself give the implementation of actionPerformed() method

My Problem with this code is how come we can write addActionListener(this) when addActionListener() takes ActionListener as the argument. Does this code mean My class implements ActionListener
by overrriding actionPerformed method(). How did my class became a ActionListener even though i have not declared my class as such.

Please explain?


Anil Deshpande
SCJP 1.5, SCWCD 1.5
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 42061
    
  64
Does this code mean My class implements ActionListener by overrriding actionPerformed method.

Sort of. It becomes an ActionListener by having an actionPerformed method AND by declaring that it implements the ActionListener interface.

How did my class became a ActionListener even though i have not declared my class as such.

Yes, you have - look at line 11.


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Anil Deshpande
Ranch Hand

Joined: Jan 13, 2008
Posts: 119
Yeah, really silly query. Just in hurry I didn't see the code at line 11. Any way thanks a lot. I realized what I did just after I posted the query
Rob Camick
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Joined: Jun 13, 2009
Posts: 2191
    
    7
I realized what I did just after I posted the query


Then why didn't you reply to the posting stating you solved the problem, so we don't waste time answering a question that has already been answered. That kind of behaviour will NOT get you help in the future.
Anil Deshpande
Ranch Hand

Joined: Jan 13, 2008
Posts: 119
Well before I could you had replied sir. Don't take any offense. Some times just things happen
 
 
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