I NEED HELP WITH THIS QUESTION

PROGRAMMING LANGUAGE : JAVA

I 'M MAKING A PHONEBOOK WITH GRAPHICAL USER INTERFACE (GUI), HERE'S MY GUI:

BUT I DON'T KNOW HOW TO ADD EVENT TO GUI BUTTONS.

I HAVE CODES FOR THEM BUT LIKE I SAID I DON'T KNOW HOW TO ADD EVENTS TO THEM. HERE'S MY CODES FOR GUI BUTTONS:

"ADD" BUTTON SHOULD DO ADDING PERSONS IN ORDER TO THEIR NAMES

"REMOVE" BUTTON SHOULD DO REMOVING PERSONS

"A - Z" BUTTON SHOULD PRINT PERSONS IN ASCENDING ALPHABETICAL ORDER

"Z-A" BUTTON SHOULD DO PRINT PERSONS IN DESCENDING ALPHABETICAL ORDER

PLEASE CAN YOU HELP ME?

Name Surname Phone Add Remove Z-A