JTextArea laggy

[lilac barn]

My JTextArea is becoming very laggy with large prime sequences. It is beeing updated every time the user hits BURN... any tips to improve it? I was also thinking in invoking (if possible) the windows CMD if the prime sequence is big...

Button BURN:

    private void buttonBurnActionPerformed(java.awt.event.ActionEvent evt) {
        outputAreaS.setText("");
        outputAreaS.setText("Calculando....\n");
        String inputString = inputNumbers.getText();
        inputString = inputString.replace(".", "");
        int number;
        try {
            number = Integer.parseInt(inputString);
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, "Inválido!");
            return;
        }
        sieve.calculate(number);
        StringBuilder sb = new StringBuilder();
        sb.append(sieve.getList());
        outputAreaS.setText(sb.toString());
    }

[mighty estuary]

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[stiff trout]

Hi, how do you calculate it? Also from what you have posted I could assume that the computation is done in AWT thread. That is not good, because for large numbers it will take some time to compute all values and GUI will freeze.

[patent crow]

You should do it in EDT

[lilac barn]

I'm using the classic Sieve of Eratostenes...

Now it's working fine, i guesss... I'm using a different thread

[patent crow]

SwingUtilities.invokeLater

that would help you stop using the main thread for the whole output

[lilac barn]

    private void buttonBurnActionPerformed(java.awt.event.ActionEvent evt) {
        outputAreaS.setText("");
        outputAreaS.setText("Calculando....\n");
        // Start the calculation in a separate thread
        SwingWorker<String, Void> worker = new SwingWorker<String, Void>() {
            @Override
            protected String doInBackground() throws Exception {
                String inputString = inputNumbers.getText();
                inputString = inputString.replace(".", "");
                int number;
                try {
                    number = Integer.parseInt(inputString);
                } catch (Exception e) {
                    JOptionPane.showMessageDialog(null, "Inválido!");
                    return "";
                }
                sieve.calculate(number);
                return sieve.getList();
            }
    
            @Override
            protected void done() {
                try {
                    // Update the JTextArea with the result
                    String result = get();
                    outputAreaS.setText("Calculando....\n" + result);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        worker.execute();
    }

[lilac barn]

Not done by me, but it worked.

[patent crow]

...done by who?

[lilac barn]

bing :p

[patent crow]

Yikes

[lilac barn]

Didnt know how to make this

[patent crow]

My suggestion could've worked too, although SwingWorker isn't far off from being a choice.

I would've probably used SwingWorker as a first too

SwingUtilities would be my second choice if SwingWorker doesn't suffice to my needs

[lilac barn]

I see

[patent crow]

SwingUtilities has one weakness and it doesn't allow you to run something in background

It will freeze any GUI you have while something is done inside it (e.g. a HTTP request)

[lilac barn]

Still studying GUI's and JavaFX, this is new to me

[patent crow]

That's Swing, not JavaFX

[lilac barn]

Oh ok

lol

[patent crow]

Don't rely on bing for things you don't know.

[lilac barn]

I never do, but this time I did

AI makes programmers dumber

[stiff trout]

And do you understand what is going on in that code?

[lilac barn]

Not yet :p

[patent crow]

Or actually makes their coding workflow faster

If used properly

[lilac barn]

Depending of the programmer level

Beginners, like me, shouldn't use this

i had no choice

[patent crow]

If I make myself an in-house library, I usually use a mixture of copilot and CGPT to write Javadocs for it. I don't want it to sound like It was written by a 12-year-old, so CGPT being the MVP of the English language compared to me can get me around

[stiff trout]

https://stackoverflow.com/a/782309

I found a nice explanation of the SwingWorker...

[lilac barn]

I see

Could also be helpful for writing documentation

My english is not that good, i'm not even american. It would help me a lot

[lilac barn]

Thank you!

[mighty estuary]

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[lilac barn]

I'll close the thread

Thank you guys

Bye