Trouble updating a JtextArea from a JTable ListSelectionListener..
Hi, I'm having trouble updating a JtextArea from a JTable ListSelectionListener, it is working for another JTextArea but I have created JNMTextArea which extends JTextArea and I am getting no data passed to it.
Any help is really greatly appreciated. Im a relative newbie to Java.
Here is the class declaration for JNMTextArea
/////////////////////////////////////////////////////////////
publicclass JNMTextAreaextends JTextArea
{
//Constructor
public JNMTextArea(String text){
super(text);
setLineWrap(true);
setEditable(false);
}
//Constructor
public JNMTextArea()
{
this(new String());
}
//This sets the data in setText, works ok.
void displayPacket(Packet p){
//Function works fine
//Need to pass this data to the JNMTextArea!!!
setText(buffer.toString());
setCaretPosition(0);
}
}
//////////////////////////////////////////////////////
Here is where I use JNMTextArea, Im
///////////////////////////////////////////////////////
class JNMGuiextends JFrameimplements ActionListener, WindowListener{
publicstatic JNMTextArea txtPktContent;
//Constructor
JNMGui(){
buildGUI();
}
privatevoid buildGUI(){
mainWindow =new JFrame("Monitor");
tblPacket =new JTable(tblPacketM);
tblPacket.setToolTipText("Packet Panel");
tblPacket.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
if (ALLOW_ROW_SELECTION){
ListSelectionModel rowSM = tblPacket.getSelectionModel();
rowSM.addListSelectionListener(new ListSelectionListener(){publicvoid valueChanged(ListSelectionEvent e){
if (e.getValueIsAdjusting())
return;
ListSelectionModel lsm =(ListSelectionModel)e.getSource();
if (lsm.isSelectionEmpty()){
System.out.println("No rows are selected.");
}
else{
int selectedRow = lsm.getMinSelectionIndex();
selectedRow++;
String str;// = "";
//Unsure if I need to create this here!
txtPktContent =new JNMTextArea();
//This works perfectly
txtPktType.append ("Packet No: " + Integer.toString(selectedRow) +"\n\n");
Packet pkt =new Packet();
pkt = (Packet) CaptureEngine.packets.elementAt(selectedRow);
if(pkt.datalink!=null && pkt.datalinkinstanceof EthernetPacket){
str ="Ethernet ";
//THis works txtPktType is another JTextArea!!
txtPktType.append ( s );
//This is not working
//I realise displayPacket return type is void but how do get
//the setText it created to append to the JNMTextArea?
txtPktContent.displayPacket(pkt);
//Adding to ScrollPane
tblPane =new JScrollPane(tblPacket);
txtPktTypePane =new JScrollPane ( txtPktType );
txtPktTypePane.setToolTipText("Packet Type");
txtPktContentPane =new JScrollPane ( txtPktContent );
txtPktContentPane.setToolTipText("Packet Payload");
panel.add( tblPane, BorderLayout.CENTER );
//End Class JNMGui
