Computers, smartphones, and many other consumer devices are only able to do the things they do for us because of programs. If you search, the chances are good that a lot of those programs will be found to have been written in Java. Java is one of the world's most successful and popular programming languages. The Java Development Kit (64 bit) is the official developer's toolbox for sixty-four bit Java, that is, Java designed to run exclusively on 64-bit machines.
The Java Development Kit (64 bit) may give you the tools, but if you want to actually write a working program, you'll need a knowledge of programming syntax, a text editor and compiler, and at least a rudimentary idea of what you want the end result of your program to be. Are you making a game? A work-oriented program?
The 64-bit Java Development Kit comes with the Java Runtime Environment, a debugger, a compiler, Javap, a disassembler class, and lots of other tools, all of which are available to you in the utility's subdirectory. Unfortunately for the novice, to take full advantage of these tools, at least with any immediacy, will require some pre-existing knowledge of Java and how to work with it. If you're willing to put in the time, though, there are demos and such included, for those who wish to learn.
The Java Development Kit (64 bit) may have its high points, but it also has flaws. Read on to see a summary of both.
JAVA DEVELOPMENT KIT (64 BIT): THE PROS
Java is one of the most commonly used programming languages. As such, there is plenty of help available to the user via the Internet. The JDK interface is easy to use, and the download is free, with a GPL license.
JAVA DEVELOPMENT KIT (64 BIT): THE CONS
Novices may find this particular utility to be beyond them. The use of a graphical environment is necessary, but it isn't included - you'll have to download it separately.
The bottom line is this: The Java Development Kit (64 bit) is a great tool, but it isn't for everyone, at least not right away. With the information you now possess, though, you should be able to confidently decide if those people it is for includes you.