What is different between Action listener and event handler

Answer 1

Action Listener is LISTENING for a certain action to happen, like the press of a button, move the mouse, or mouse click. So it listens to things the user is doing.

Event handler is what the program is doing, change colour.
It handles an action performed by the computer, usually in response of the user's actions

Answer 2

that means action listener listener lisen to use and get input process
event handler give out put show or give by computer which can base on action listener or other listener or other input codes I am I right?

Answer 3

Indeed, you're right