JFormattedTextField value is different then what I have set

Question

I am using JFormattedTextField to display percentage values in a text field as below:

NumberFormat percentDisplayFormat = NumberFormat.getPercentInstance();
NumberFormat editFormat = NumberFormat.getNumberInstance();

percentDisplayFormat.setMinimumFractionDigits(2);

NumberFormatter percentEditFormatter = new NumberFormatter(editFormat);

JFormattedTextField jftfPercentage = new JFormattedTextField(new DefaultFormatterFactory(new NumberFormatter(percentDisplayFormat), new NumberFormatter(percentDisplayFormat), percentEditFormatter));

jftfPercentage.setBounds(113, 95, 236, 21);
jftfPercentage.setName("JftfPercentage");

And setting the value like below:

jftfPercentage.setValue(<someDoubleValue>);

Now, suppose I have set the value as 80, then it is displaying the value as 8000%.
But, whenever I click on the field, it is displaying as 80 only.

Can someone help me on displaying the same value that we set. Thanks in advance

To get a displayed value of `80%`, should't the value set be `0.80`? — trashgod, Jan 16 '17 at 14:24
@trashgod if I set the 0.8 as a value, then it gets displayed as 80% however when I click on the filed then it is displaying as 0.8 only — Saikiran Gosikonda, Jan 17 '17 at 05:37
Also consider a `JSpinner`, `Slider` or [`SpinSlider`](http://stackoverflow.com/a/6067986/230513). — trashgod, Jan 17 '17 at 07:08
@trashgod we can use them, but how can we achieve the same using JFormattedTextField — Saikiran Gosikonda, Jan 17 '17 at 07:11
Honestly, I think that would be confusing and prone to error. — trashgod, Jan 17 '17 at 08:18
@trashgod Thank you very much for your suggestions. And after some search, I got the solution for it and I have posted it here — Saikiran Gosikonda, Jan 17 '17 at 10:05

score 0 · Accepted Answer · answered Jan 17 '17 at 10:04

I got the issue here. Internally the default number formatter multiplies the given value with 100 while displaying it. (If we use the PercentInstance)

NumberFormat percentDisplayFormat = NumberFormat.getPercentInstance();
NumberFormat editFormat = NumberFormat.getNumberInstance();

percentDisplayFormat.setMinimumFractionDigits(2);

NumberFormatter percentEditFormatter = new NumberFormatter(editFormat);

// This was the new change that I have made
NumberFormatter percentDisplayFormatter = new NumberFormatter(percentDisplayFormat)
{
    @Override
    public String valueToString(Object o) throws ParseException
    {
        Double number = null;
        if (o != null)
        {
            number = Double.valueOf(o.toString());
            number /= 100;
        }
        // In super class, it multiplies the number by 100. So as we are dividing the number by 100 here. In super level it will become the same value that we have given        
        return super.valueToString(number);
    }
};

JFormattedTextField jftfPercentage = new JFormattedTextField(new DefaultFormatterFactory(percentDisplayFormatter, percentDisplayFormatter, percentEditFormatter));

jftfPercentage.setBounds(113, 95, 236, 21);
jftfPercentage.setName("JftfPercentage");

JFormattedTextField value is different then what I have set

1 Answers1