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Thread: Updating JList

  1. #1
    Junior Member
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    Default Updating JList

    I have a Jlist receiving elements from a model. the model has elements and when I remove the elements, I want the jlist to update after the removal from the model

  2. #2
    Super Moderator pbrockway2's Avatar
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    Jan 2012
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    Default Re: Updating JList

    Represent the model by an instance of ListModel. (Eg a DefaultListModel or an AbstractListModel) As the JList documentation states:

    "A ListModel can be supplied directly to a JList by way of a constructor or the setModel method. The contents need not be static - the number of items, and the values of items can change over time. A correct ListModel implementation notifies the set of javax.swing.event.ListDataListeners that have been added to it, each time a change occurs. These changes are characterized by a javax.swing.event.ListDataEvent, which identifies the range of list indices that have been modified, added, or removed. JList's ListUI is responsible for keeping the visual representation up to date with changes, by listening to the model."

    The How to Use Lists page of Oracle's Tutorial gives a worked example using a DefaultListModel in the section "Adding Items to and Removing Items from a List".

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