Java mailto Illegal character colon? -

im trying send email attachment, keeps saying:

 exception in thread "awt-eventqueue-0" java.lang.illegalargumentexception: illegal character in opaque part @ index 64: mailto:recipient@mailserver.com?subject=thepdffile&attachment=c:\users\rascal\appdata\local\temp\freelancerlist-16-12-2014_09-227568200505392670736.doc 

java code:

desktop desktop = desktop.getdesktop();          string message = "mailto:recipient@mailserver.com?subject=thepdffile&attachment=\""+path;          urlencoder.encode(message, "utf-8");         uri uri = uri.create(message);          desktop.mail(uri);     

should colon right? why???

you're calling urlencoder.encode, ignoring result. suspect trying achieve this:

string encoded = urlencoder.encode(message, "utf-8"); uri uri = uri.create(encoded); 

... although @ point you'll have encoded colon after mailto part well. suspect really want like:

string query = "subject=thepdffile&attachment=\""+path; string prefix = "mailto:recipient@mailserver.com?"; uri uri = uri.create(prefix + urlencoder.encode(query, "utf-8")); 

or encoding values:

string query = "subject=" + urlencoder.encode(subject, "utf-8");     + "&attachment=" + urlencoder.encode(path, "utf-8")); uri uri = uri.create("mailto:recipient@mailserver.com?" + query); 

... or create uri various different parts separately, of course.