Implementing interfaces

Question

I know what interface is and how to build/use one. Lets take the ActionListener interface for example. My question is what happens after I click on a button, which class calls the actionPerformed method?what is the process from the part that I click the button to the part that the actionPerformed is executed?

Is that ActionListener android or swing?

AlexWien
– AlexWien

2013-02-18 20:01:30 +00:00
Commented Feb 18, 2013 at 20:01 — AlexWien
– AlexWien, Commented Feb 18, 2013 at 20:01
Speaking generally, but if it matters the swing

Imri Persiado
– Imri Persiado

2013-02-18 20:03:03 +00:00
Commented Feb 18, 2013 at 20:03 — Imri Persiado
– Imri Persiado, Commented Feb 18, 2013 at 20:03

JB Nizet · Accepted Answer · 2013-02-18 20:12:12Z

1

The JButton calls the ActionListener.

Internally, it listens to keyboard and mouse events. When it receives a mouse click or a keypress which means "click the button", it creates an ActionEvent instance, loops through all the ActionListener instances that have been added to itself, and calls each one with the ActionEvent as argument.

answered Feb 18, 2013 at 20:12

JB Nizet

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