4 replies to this topic

[isuru]

Hi!

I saw an applet created to test download speed. But I'm confused how to achieve that. You can go to this url and check it out. It's a government website. I thought java has no support like ping, traceroute.

[gregwarner]

Java has something called the JNI (Java Native Interface), which allows it to call libraries written in the host's native code. That's probably how they're doing it.

[isuru]

Java has something called the JNI (Java Native Interface), which allows it to call libraries written in the host's native code. That's probably how they're doing it.

Hmm.... Yeah, I think that is the only way. But using JNI restricts system Independence, right?

[gregwarner]

Yes, but if you absolutely must have native access to the host, you're gonna be sacrificing platform portability anyway, so it should only be used when there is a very good reason to do so.

You can, however, write multiple libraries, one for each platform, and have Java detect the platform and load the appropriate library at runtime.

[lethalwire]

Are you sure you're wanting to use the java applet route? With so many security issues in java right now, I leave all of my java plugins disabled and I'm sure many others do too.