java - How to know when two threads are finished in Swing -

java - How to know when two threads are finished in Swing -

i have perform 2 tasks. 2 threads perform each task simultaneously. tasks don't share data.

before tasks start, shown dialog info "wait, processing...".

here codes:

final jdialog dialog = new jdialog(this, true); swingworker<void, void> worker = new swingworker<void, void>() { @override protected void doinbackground() throws exception { // job homecoming null; } @override protected void done() { // must close dialog? other finished? } }; swingworker<void, void> worker2 = new swingworker<void, void>() { @override protected void doinbackground() throws exception { // job homecoming null; } @override protected void done() { // must close dialog? other finished? } }; worker.execute(); worker2.execute(); dialog.setvisible(true); // must close dialog?

i close dialog when 2 threads ended. how know when ended? , when should close dialog?

update: threads must run simultaneously, not in sequential mode.

create countdownlatch, set 2 create 2 swingworkers, passing each reference countdownlatch. in there done methods, phone call countdown on latch. in done method, called regardless of how doinbackground method exited (ie in case throws exception) create 3rd swingworker, passing reference countdownlatch, in worker wait latch in doinbackground method. 1 time swingworker's done method called, should able dispose of dialog safely

java multithreading swing