Using TextArea to monitor query ...

Question

I am unable to do the following:
Have a textarea and a button on a panel.
When the button is clicked, the textarea displays "Starts Query"
Then program queries the database.
Finally, the textarea displays "end query".
Problem: once the button is clicked, the textarea displays both
"Start Query" and "End Query" AFTER the query is done. (I know this
because the query is large - so at the very least I there should
be a lapse of time between the two messages).
There is a class that displays messages on the textarea (threaded)
and there is a class for the query (threaded).
the following is a snippet:
void jButton1_actionPerformed(ActionEvent e) {
String msg = "Start querying";
Message m = new Message(textArea,msg);
m.start();
DBConnection db = new DBConnection();
db.start();
m.addMessage("Number of records:");
in the run method of Message:
public void run() {
addMessage(msg);
public synchronized void addMessage(String m) {
t.append(m + "\n");
and in the run method of the other class
public void run() {
doQuery();
synchronized int doQuery() {
int counter = 0;
try {
wait();
rs = stmt.executeQuery(query);
while (rs.next())
counter ++;
rs.close();
stmt.close();
con.close();
return counter;
catch (java.lang.InterruptedException ie) {}
catch (SQLException sqlex) {}
return -1;
I am guessing that I am not using the threads the right way, or maybe I am
totally off somewhere!
Help is greatly appreciated!
Thanks,
Manyiu
[email protected]

Answer 1

After a quick look, it seems you are doing the right thing. The only suggestion i can give u is to get rid of the Message class (Is there a reason you need it?). Instead, do a textarea.settext before creating your db connection.