How to make a field not required?

I am trying to make a field not required using iText.

I know that I can make a field required using something like below statement:

formFields.setFieldProperty(field, "setfflags", PdfFormField.FF_REQUIRED, null);

Is there anything similar to make an existing field not required?

Posted on StackOverflow on Dec 1, 2014 by user2296988

Please have a look at the “How to find out which fields are required?” question. Is solves the same problem.

Based on your question, I assume that you have an existing PDF where you have required fields. It’s really simple to change the FF_REQUIRED flag in iText 7:

public void manipulatePdf(String src, String dest) throws IOException {
    PdfDocument pdfDoc = new PdfDocument(new PdfReader(src), new PdfWriter(dest));
    PdfAcroForm form = PdfAcroForm.getAcroForm(pdfDoc, true);
    Map fields = form.getFormFields();
    PdfFormField item;
    for (String key : fields.keySet()) {
        item = fields.get(key);
        if (item.isRequired())
                item.setRequired(false);
    }
    pdfDoc.close();
}

As you see, we get the form fields using getFormFields() method, then loop all the fields and (if necessary) apply setRequired() method with the false parameter.

Click How to make a field not required? if you want to see how to answer this question in iText 5.