A lot of things wrong with your post.
1. The F-117 was shot down after careful planning and baiting the aircraft. Even then only when it opened its bay.
2. The phones may be made in China, but the designs of ALL phones including Apple, Nokia and other foreign companies come from abroad. It is like someone claiming that since they make LEGO sets like the instructions, they are the master.
Doing this does not mean you have invented or know anything.
3. The LOAN( Low Observable Asymmetric Nozzle) was a precursor program to the F-35's nozzle. essentially it took the idea of reducing the RCS return of the traditional nozzle along with certain heat reduction. Compared to that, the F-22's nozzle is SUPERIOR in both RCS and IR reduction( Although the YF-23 had better IR reduction than that even). At this point, the J-20 has poor IR suppression from its engines compared to the F-22, yet the J-20 is still a prototype undergoing testing so we cannot say the final form. Additionally, the J-20 is NOT a stealth design comparable to the F-22 in all round terms simply because of its design philosophy/compromises. That does not mean that it is not a capable platform, just the idea behind the J-20 looks different to me than that of the F-22 or PAK-FA.
Also, the PL-12 has not yet entered the testing phase beyond dummy carriage.
4. The F-35 has gone beyond the single sensor concept and is essentially the first swarm machine. Its designed to capture information much more rapidly, process it the same and present it to the pilot(warrior) in the best fashion possible. Its Radar, its other electronic sensors along with DAS will ensure that anything more than one F-35 will be deadly to any fighter in the air.
The J-20 by contrast looks much like the F-22 in philosophy. Its designed as a silent sword. The idea is to get close VERY quick to the fight and use information and links from other J-20s to make a quick kill and then run. It is much like the Mig-31 interceptor except it is more stealthy and more manoeuvrable. The J-20 may or may not be the fastest air domination fighter, but it is possibly the one that will accelerate the fastest. Which means it will supercruise faster than the F-22 and PAK-FA, that translate to better range and essentially better kinetic push for all its missiles at the right time.