Error message query

Question

Can anyone explain what this means please?
ListTest.java:6: ListTest should be declared abstract; it does not define actionPerformed(java.awt.event.ActionEvent) in ListTest
public class ListTest extends GUIFrame implements ItemListener,ActionListener
ListTest is a class that does some GUI and returns an array if thats any help. If you need more info just ask.
Thanks

Answer 1

Can anyone explain what this means please?
ListTest.java:6: ListTest should be declared abstract;
it does not define
actionPerformed(java.awt.event.ActionEvent) in
ListTest
public class ListTest extends GUIFrame implements
ItemListener,ActionListenerWhen you are implementing any Listener, You need to implement all the methods in that Listener interface in your class. In this case, ListTest needs to implement a method something like this...
public void actionPerformed(ActionEvent ae) {
// code to handle the action event