I think it is because I use Minecraft Beta on 64 bit Java too. :D
No.
yes
The Java Long Datatype is a 64 bit data language, this format of Java is important to be skilled in for anyone that are to be doing C++ programing language.
Yes! Remember to install Java 64-bit for desktop java applications.
It's just market. Most of computers produced these days are 64 bits. Programmers just adopt to the market.
Try reinstalling jdk
use a 64-bit java to run minecraft. Or install optifine to reduce lag
As long as you have Java installed you can use the .exe as normally downloaded from their main website. Java 64-bit is recommended if you have a 64-bit System because it will affect your Minecraft settings. You can also play it in a supported Desktop browser(not the W8 including IE App).
allocate more memory to run minecraft. Use a 64-bit java for optimum peformance
Not at all. Minecraft REQUIRES Java. If you don't have it, sorry! It is also important when downloading Java to play Minecraft to understand whether you need the 32-bit or 64-bit version for your computer. For more information regarding this check out the guide I have included in the Related Links section below.
Go to the Java site, search for your operating system (Windows, 64-bit, I assume - or whatever you have), and download it. There are two versions of Java, one for programmers (includes the SDK), and one for the end-user.