C++ or Java for Leap Motion?

Another useless pole.

You're the one that intends to develop applications yet haven't given any indication of whom, what or platform these applications are targeting.

 

I think the real question is, what are you trying to develop and how much experience do you have? If its a video game, then you'll likely want to use C++, Objective C*, or C#. If you're creating a basic multimedia app then it likely doesn't matter. If you're going to create something with tight integration with OS X (i.e. a 3D gesture remote or mouse) then C/Obj. C is likely your weapon of choice.

One tangible benefit of using one of those three languages is that there is a lot of libraries available and a lot of momentum in terms of multimedia software. A perk of a Java codebase is if they get Android support of some kind rolling. Another is that if you're relatively new to programing, Java will arguably have a lower learning curve than the alternatives they list since it has a C like syntax and hides memory management from you.

In general, I prefer C++, Obj. C, & C# over Java but thats just me.

One option that you might want to look at if you're doing anything 3D is Unity 3D. I'm not a *huge* fan of it as a platform but a lot of people have made decent-good software with it and it has a TON of content/libraries/assets/tutorials available for it. Assuming their SDK works with it then you can use C# and UnityScript (an ECMAscript dialect like JavaScript).

*since Objective C is built on top of C, you can use any C library that will compile/is compiled for OS X or iOS. C++ libraries can be used as well via Objective C++.

 

I doubt that someone who can't even pgdn to see the 4 page C++ vs Java thread let alone use a search engine is going to get very far writing any application.