JTextField Specific format checking

Question

I want to check if the input entered to my JTextField1 equal to shown sample picture below, how to do that?

I can only check if numbers entered by putting below code in to try block and catch NumberFormatException

   try {
       taxratio = new BigDecimal(jTextField1.getText());  }
      } 
         catch (NumberFormatException nfe) {
            System.out.println("Error" + nfe.getMessage());
        }

enter image description here

let me try , in swing pallet netbeans IDE there is but how to check it let me see — user3498019, May 05 '14 at 11:20
Use a `JSpinner` as seen [here](http://stackoverflow.com/a/10021773/418556). — Andrew Thompson, May 05 '14 at 11:25
Use JFormattedTextField. http://docs.oracle.com/javase/8/docs/api/javax/swing/JFormattedTextField.html — Hirak, May 05 '14 at 11:28
but sometimes user inputs like this 0.18 instead %18 so my calculation becomes wrong because my formula calculate wrong if the input is 0.18 — user3498019, May 05 '14 at 11:29
Using JFormattedTextField corrects the input only if the input is 0.18 it does 1800 , it is actually %18 , if the input %18 I divide by hundred to obtain 0.18 ,but user input can differ thats why I am having issue ! — user3498019, May 05 '14 at 11:40

user1803551 · Accepted Answer · 2014-05-21T04:02:10.993

Here are two options:

A JTextField with an InputVerifier. The text field will not yield focus unless its contents are of the form specified.

JTextField textField = new JTextField();
textField.setInputVerifier(new InputVerifier() {
    @Override
    public boolean verify(JComponent input) {
        String text = ((JTextField) input).getText();
        if (text.matches("%\\d\\d"))
            return true;
        return false;
    }
});
textField.setText("%  ");

A JFormattedTextField with a MaskFormatter. The text field will not accept typed characters which do not comply with the mask specified. You ca set the placeholder character to a digit if you want a default number to appear when there is no input.

MaskFormatter mask = new MaskFormatter("%##");
mask.setPlaceholderCharacter(' '); 
JFormattedTextField textField2 = new JFormattedTextField(mask);

JTextField Specific format checking

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