Swingworker producing duplicate output/output out of order?
- by Stefan Kendall
What is the proper way to guarantee delivery when using a SwingWorker? I'm trying to route data from an InputStream to a JTextArea, and I'm running my SwingWorker with the execute method. I think I'm following the example here, but I'm getting out of order results, duplicates, and general nonsense.
Here is my non-working SwingWorker:
class InputStreamOutputWorker extends SwingWorker<List<String>,String> {
private InputStream is;
private JTextArea output;
public InputStreamOutputWorker(InputStream is, JTextArea output) {
this.is = is;
this.output = output;
}
@Override
protected List<String> doInBackground() throws Exception {
byte[] data = new byte[4 * 1024];
int len = 0;
while ((len = is.read(data)) > 0) {
String line = new String(data).trim();
publish(line);
}
return null;
}
@Override
protected void process( List<String> chunks )
{
for( String s : chunks )
{
output.append(s + "\n");
}
}
}
