How to Sign RTF with Barcode Signature using Java. For more information, please follow link: https://kb.groupdocs.com/signature/java/how-to-sign-rtf-with-barcode-signature-using-java/

How to Sign RTF with Barcode Signature using Java.java

import com.groupdocs.signature.Signature;
import com.groupdocs.signature.domain.barcodes.BarcodeTypes;
import com.groupdocs.signature.licensing.License;
import com.groupdocs.signature.options.sign.BarcodeSignOptions;

public class SignRTFwithBarcodeSignatureUsingJava {
    public static void main(String[] args) throws Exception {

        // Set License to avoid the limitations of Signature library
        License license = new License();
        license.setLicense("GroupDocs.Signature.lic");

        // load the source RTF file
        Signature signature = new Signature("input.rtf");

        // setup options with text of signature
        BarcodeSignOptions signOptions = new BarcodeSignOptions("12345678");
        // setup Barcode encoding type
        signOptions.setEncodeType(BarcodeTypes.Code128);
        // set signature position
        signOptions.setLeft(200);
        signOptions.setTop(200);
        signOptions.setPageNumber(1);

        // sign document to file
        signature.sign("output.rtf", signOptions);
    }
}