Java Programming

Hi everyone

I have an instantiated Jframe containing a ComboBox and a JtextArea. Dependant on the item selected by the ComboBox, different text is displayed in the JtextArea. As far as I am aware, the information is applied correctly for display however the display does not update as expected to.

EXAMPLE: propertyChangeListener � ComboBox

private void dataSetComboBoxPropertyChange(java.beans.PropertyChangeEvent evt) {
        // Change data set for viewing
        this.setDataSet();
    }

EXAMPLE: method called by propertyChangeListener

public void setDataSet(){
        currentData.clear();
        currentData.trimToSize();
        dataDisplayArea.setText("");
        comboIndex = dataSetComboBox.getSelectedIndex();
        fm.getData(comboIndex);
        sizer = fm.getDataSetSize();
        System.out.println("New set size is: "+sizer);
        for(int indexer = 0;indexer < sizer;indexer++){
            currentData.add(fm.getDataString(indexer));
            dataDisplayArea.append(currentData.get(indexer)+"\n");
            dataDisplayArea.setCaretPosition(1);
        }  
    }

The �System.out.println� is for testing purposes. It only produces the output when the Jframe is closed, hence my conclusion about the data being ready. I know the functional code for getting the ArrayList works ok.

Essentially, the information is updated after the Jframe is disposed. I�ve done some reading and am wandering if this issue related to the serializeable issue with objects and thus should I use a transient serializeable protocol on the JtextArea? Or am I way off the mark? Is this possible?

I have tried to implement a thread but it has no affect on the operation:

EXAMPLE: threaded method

Runnable update = new Runnable(){
        public void run(){
                currentData.clear();
                currentData.trimToSize();
                dataDisplayArea.setText("");
                fm.getData(comboIndex);
                sizer = fm.getDataSetSize();
                for(int indexer = 0;indexer < sizer;indexer++){
                    currentData.add(fm.getDataString(indexer));
                } 
                dataHeadersDisplay.setText(currentData.get(0));
                for(int indexer = 1;indexer < sizer;indexer++){
                    dataDisplayArea.append(currentData.get(indexer)+"\n");
                    dataDisplayArea.setCaretPosition(1); 
                }                 
        }
    };

EXAMPLE: listener that calls the thread

private void dataSetComboBoxPropertyChange(java.beans.PropertyChangeEvent evt) {
        // Get data set
        new Thread(update).start();     
    }

Although, I am not sure I have implemented this correctly, it compiles and so assume it to be ok.

Many thanks for any advice.

Edited by: chewzLife on May 24, 2008 5:00 PM