Cant set a JTextField as an int

Question

When I use setText() on the textfield it wont allow me to do so because what i want in there is an int, i would change the int to a string but int's are needed to do further calculations.

How can I get set the text of a JTextField with an int.

private void setAllTextFields(MenuItem m){
        desBox.setText(m.getDescriptions());
        priceTF.setText(m.getPrice());
        calsTF.setText(m.getCalories());
    }

price and calories are the numbers

thanks

You must display them as strings. You can always parse them back out to int to do calculations — OneCricketeer, Apr 05 '16 at 12:21
@cricket_007 *"You must display them as strings. You can always parse them back out to int to do calculations"* Better still, use an int based `SpinnerNumberModel` in a `JSpinner` and keep the input/output values as integer! — Andrew Thompson, Apr 05 '16 at 23:17
@AndrewThompson I'm not too well-versed in the Swing library, but would that work for a `JTextField`? I thought a Spinner was like a dropdown option. — OneCricketeer, Apr 05 '16 at 23:22
*"I thought a Spinner was like a dropdown option."* That's a `JComboBox`. A spinner has little up/down arrows beside the field that allow the value to be incremented or decremented. For an example of what spinners look like (and how to use them) see [this answer](http://stackoverflow.com/a/17874718/418556).. — Andrew Thompson, Apr 05 '16 at 23:25

score 2 · Answer 1 · answered Apr 05 '16 at 12:26

2

You could take number input using JFormattedTextField as follows:

JFormattedTextField numberField 
   = new JFormattedTextField(NumberFormat.getNumberInstance());

//get value from text field
double d = ((Number)numberField.getValue()).doubleValue();

answered Apr 05 '16 at 12:26

mmuzahid

2,252
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score 1 · Answer 2 · answered Apr 05 '16 at 12:25

1

You could parse each time you read the value :

// set :
priceTF.setText(String.valueOf(m.getPrice()));

// get :
int value = Integer.parseInt(priceTF.getText());

answered Apr 05 '16 at 12:25

Apolo

3,844
1
21
51

Cant set a JTextField as an int

2 Answers2