Make JFormattedTextField accept decimal with more than 3 digits

Question

I have a JFormattedTextField that should be able to accept double numbers with more than 3 decimal digits. It accepts entries 0.1, 0.01, 0.001 but rejects 0.0001 and numbers with more decimal digits.

This is how my code works now:

DecimalFormat decimalFormat = new DecimalFormat("0.0E0");
JFormattedTextField txtfield = new JFormattedTextField(decimalFormat.getNumberInstance(Locale.getDefault()));

How do I get my text field to accept numbers with more than 3 decimal digits?

This is not an answer, but alternative http://stackoverflow.com/a/8017847/597657 — Eng.Fouad, Feb 14 '13 at 14:14
Seems like a job for `DocumentFilter` see [here](http://stackoverflow.com/questions/14305921/detecting-jtextfield-deselect-event/14305952#14305952) for an example of `DocumentFilter` and other ways and their respective examples. You can have variable lengthed mask but thats too much IMO but incase you want to see it [here](https://forums.oracle.com/forums/thread.jspa?threadID=1363095). — David Kroukamp, Feb 14 '13 at 14:15

score 8 · Accepted Answer · answered Feb 14 '13 at 14:21

It accepts entries 0.1, 0.01, 0.001 but rejects 0.0001 and numbers with more decimal digits.

this should be settable in NumberFormat / DecimalFormat (in your case) by setMinimumFractionDigits(int), setMaximumFractionDigits(int) and /or with setRoundingMode(RoundingMode.Xxx), more in Oracle tutorial about Formatting

for example

final JFormattedTextField textField1 = new JFormattedTextField(new Float(10.01));
    textField1.setFormatterFactory(new AbstractFormatterFactory() {

        @Override
        public AbstractFormatter getFormatter(JFormattedTextField tf) {
            NumberFormat format = DecimalFormat.getInstance();
            format.setMinimumFractionDigits(2);
            format.setMaximumFractionDigits(2);
            format.setRoundingMode(RoundingMode.HALF_UP);
            InternationalFormatter formatter = new InternationalFormatter(format);
            formatter.setAllowsInvalid(false);
            formatter.setMinimum(0.0);
            formatter.setMaximum(1000.00);
            return formatter;
        }
    });
}

@both, but there all advantage of JFormattedTextField ended, (-: the best for un_editable fields and only for nicer formatting :-) — mKorbel, Feb 14 '13 at 14:40
Thank you very much. Nice solution =) If I enter ```0.0000000001``` for instance, after allowing 12 fraction digits, how do I get it to show this as ```1.0e-9```? — sehlstrom, Feb 14 '13 at 14:58
there is possible to add InputMask (code example in my answer), see Scientific Notation in DecimalFormats API — mKorbel, Feb 14 '13 at 15:03

Make JFormattedTextField accept decimal with more than 3 digits

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