How can i change an existing JPanel from a JFrame after an event happens?

Question

Good day!
i'm new in java programing and im trying to build a GUI for a for a small inventory system.
here's a part of my code............
if(e.getSource()==invButton){
               if(username.equals(storekeeper)){
                    cont.add(new Equipment(cont,deck,username),"equipment");
                    deck.show(cont,"equipment");
                    cont.remove(this);
               }else{
                    cont.add(new EquipmentEmployee(cont,deck,username),"equipmentEmployee");
                    deck.show(cont,"equipmentEmployee");
                    cont.remove(this);
my code calls a new class called Equipment.java after a button is pressed and add it into a frame.
but the problem is nothings happened. my code didn't work.
can anyone help me fix my problem?..
thanx!!...

Answer 1

my code calls a new class called Equipment.java after a button is pressed and add it into a frame.
but the problem is nothings happened. my code didn't work.Did you add the action listener to your button? Like below:
invButton.addActionListener(this);