How to format field for RG with issuing organ?

Question

I have the following java class:

public class TesteRG {

public static void main(String[] args) {
    String  RG = "24.77.195 ssp/pb";

    Pattern pattern = Pattern.compile("\\d{2}.\\d{2}.\\d{3}\\s\\w{3}/\\w{2}");
    Matcher matcher = pattern.matcher(RG);

    if (matcher.find()) {
        System.out.println("Valido");
    } else {
        System.out.println("Não Valido");
    }
}

It works, but when I call on the frame it has a jTextField called jTFRG with the following custom code "the problem is here":

jTFRG = new javax.swing.JFormattedTextField();
try {
    jTFRG.setFormatterFactory(new javax.swing.text.DefaultFormatterFactory(new javax.swing.text.MaskFormatter("##.##.### ###/##")));
} catch (java.text.ParseException ex) {
ex.printStackTrace();
}

it just lets me enter numbers. How do I insert a String equal to: 12.123.44 SSP/SP

The validation part is working now only need to insert the letters beyond the numbers.

When I try to insert the formatted field just let me put numbers and the String value gets: 11.11.111 111/11

Answer 1

According to class documentation MaskFormatter, the character # indicates the entry of numbers only, if you want to merge the numeric mask including letters, valid formatting characters are U(turn the typed letters into uppercase letters) and L(turns typed letters into minuscules):

Try the below:

 MaskFormatter formatter = new MaskFormatter("##.##.### UUU/UU");
 formatter.install(jTFRG);

I made a test with this mask and see the result:

Only accept numbers in the first 7 digits, then only accept letters and convert to uppercase.