Ok. I've decided to migrate to v200.0.0 (from v10.2.4)
To check the new features of the API version I executed the sample viewer (an ArcGIS Maps SDK for java demo app), and it woks fine when I'm at home. But at work it shows nothing, any map. It's blank. I run the application from command line to see the error messages but also the console is blank, no error messages. I tried with my mobile data (from my cell phone) and it works ok. So, I suspect that it is a proxy issue in my institutional network.
I'll request to my IT department to unblock or handle the appropriate permissions to access the ArcGIS services. But I need to provide specific URL's. I've looked for them in the web and the only I found is in this page https://developers.arcgis.com/documentation/mapping-apis-and-services/maps/services/basemap-layer-service/ but I'm not sure whether this is the correct and only URL I must provide.
Please, could you give me guidelines about this information?