RemovePhotoshopMetadataFromJPEG.cs

using (Metadata metadata = new Metadata("sample.jpeg"))
{
    var root = metadata.GetRootPackage<JpegRootPackage>();
    root.RemoveImageResourcePackage();
    metadata.Save("output.jpeg");
}

SignDocumentWithTextSignature.java

Signature signature = new Signature("sample.pdf");
 
TextSignOptions options = new TextSignOptions("John Smith");
// set signature position
options.setLeft(100);
options.setTop(100);
 
// set signature rectangle
options.setWidth(100);
options.setHeight(30);
 
// set text color and Font
options.setForeColor(Color.RED);
SignatureFont signatureFont = new SignatureFont();
signatureFont.setSize(12);
signatureFont.setFamilyName("Comic Sans MS");
options.setFont(signatureFont);
 
// sign document to file
signature.sign("sample_signed.pdf", options);