javax swing freezing

[matt271]

swing keeps freezing on me

i have code like:

Java:

public boolean sendFile(File file, JProgressBar bar) {         try {             FileInputStream fstream = new FileInputStream(file);             int sum = 0;             bar.setMaximum((int)file.length());             int read;             byte[] bytes = new byte[BUFFER];             while ( (read = fstream.read(bytes)) > 0 ) {                 ostream.write(bytes, 0, read);                 if (autoflush) ostream.flush();                 sum += read;                 bar.setValue(sum);                 bar.repaint();             }             fstream.close(); ...

but it will not update the prog bar until its done. also while its loading, the gui is frozen.

i tried things like Thread.sleep(1); it didnt work.

in VB i would just say DoEvenets but i dont think java works like that.

also i tried running this in another thread. like i create a new thread then call my method. it still freezes

there has to be a way to make this not freeze, any help plz?