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Thread: Can not clear the contents of JList Java

  1. #1
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    Unhappy Can not clear the contents of JList Java

    Hello friends..I am new to this forum .
    I am developing small application using NetBeans 7.0 which has a JList on the form (from the palette) . I am filling the JList using the vector which contains records from database. But I can not clear the contents of the JList. Please help me friends. Here is my code

     
    private void dateChooserSelectedDatePropertyChange(java.beans.PropertyChangeEvent evt) {                                                       
     
            DefaultListModel model = new DefaultListModel();
            listSerialNo = new JList(model);
     
            UpdatePurchase updatePurchase = new UpdatePurchase();
            Vector<String> serialNo = new Vector<String>();
            serialNo = updatePurchase.getSerialNoForSelectedDate(date);
            if(serialNo.size()>0){
                listSerialNo.setListData(serialNo);
            }
            else{
                model.clear();
                resetFields();
            }
        }

    If I use above code then neither Jlist contains any record nor it clears the contents of JList . If I remove
    DefaultListModel model = new DefaultListModel();
    listSerialNo = new JList(model);
    // if & else code from above code snippet
    model.clear();
    then atleast JList contains some records for specific date if available.

    My aim is if there are records available for specific date then that record should be displayed in JList otherwise JList should be empty. Please guide me.
    Thanks .


  2. #2
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    Default Re: Can not clear the contents of JList Java

    Instead of removing invalid data from your List, why not only put valid data in the List in the first place?
    Improving the world one idiot at a time!

  3. #3
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    Default Re: Can not clear the contents of JList Java

    Quote Originally Posted by Junky View Post
    Instead of removing invalid data from your List, why not only put valid data in the List in the first place?
    @Junky Thanks for reply. In my application,when I select date from JDateChooser if records are present for selected date in database then it will be fetched & displayed in JList. Otherwise error message will be displayed. So even if record are not present for particular date ,records for previous date are in JList. I don't want to display any records in jList in this case.

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    Default Re: Can not clear the contents of JList Java

    In that case create a new JList each time you fetch data from the database.
    Improving the world one idiot at a time!

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    Default Re: Can not clear the contents of JList Java

    Quote Originally Posted by Junky View Post
    In that case create a new JList each time you fetch data from the database.
    Can you tell me , how to create new JList each time. I am not clear with what you are saying. Because I have JList placed on the form from the NetBeans palette & fetched data from the database is displayed in JList.

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