How to set the format of a Java text field?

Question

Java

How to set Java Swing textbox format?

jft1 = new JFormattedTextField(nb1);
          jft1.setBounds(300, 60, 200, 30);
          add(jft1);

So that only the type int or double is entered into it?
What to use?

Answer 1

Вот решение

private JFormattedTextField amountField;
         private NumberFormat amountFormat;
  
        amountField = new JFormattedTextField(amountFormat);
        amountField.setValue(new Double(amount));
        amountField.setColumns(10);

        JPanel fieldPane = new JPanel(new GridLayout(0,1));
        fieldPane.add(amountField);
        amountFormat = NumberFormat.getNumberInstance()

Answer 2

stackoverflow.com/questions/11093326/restricting-j...
Или так:
stackoverflow.com/questions/18084104/accept-only-n...