Anuradha Anuradha - 1 year ago 57
Java Question

To set delay on a button click in java?

I have a save button in a

JFrame
;on clicking save the 'save' text sets to 'saving....'; I need to set that text as 'saved' after a delay of 10 seconds.How is it possible in java?
Please help...

try {
Thread.sleep(4000);
} catch (InterruptedException e) {

e.printStackTrace();
}


This is what i did...but this wont shows as 'saving' during that delayed time.

Answer Source

If you want to provide the user with visual feedback that something is going on (and maybe give some hint about the progress) then go for JProgressBar and SwingWorker (more details).

If on the other hand you want to have a situation, when user clicks the button and the task is supposed to run in the background (while the user does other things), then I would use the following approach:

button.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {                                          
        button.setEnabled(false); // change text if you want
        new SwingWorker<Void, Void>() {
            @Override
            protected Void doInBackground() throws Exception {
                // Do the calculations
                // Wait if you want
                Thread.sleep(1000);
                // Dont touch the UI
                return null;
            }
            @Override
            protected void done() {
                try {
                    get();
                } catch (Exception ignore) {
                } finally {
                    button.setEnabled(true); // restore the text if needed
                }
            }                    
        }.execute();
    }
});

Finally, the initial solution that was using the Swing specific timer:

final JButton button = new JButton("Save");
button.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {                                          
        // Take somehow care of multiple clicks
        button.setText("Saving...");
        final Timer t = new Timer(10000, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent evt) {
                button.setText("Saved");
            }
        });
        t.setRepeats(false);
        t.start();
    }
});
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