Java Runtime Environment (JRE) (64-Bit)

Java Runtime Environment (JRE) (64-Bit) provides the libraries, the Java Virtual Machine, and other components to run applets and applications written in the Java programming language. In addition, two key deployment technologies are part of the JRE: Java Plug-in, which enables applets to run in popular browsers; and Java Web Start, which deploys standalone applications over a network.

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64-bit Java

    What is 64-bit Java?
    Which platforms and Java releases support 64-bit operation?
    Where can I download the 64-bit SDK or JRE?
    When you download the SDK or JRE, must you choose between the 32 and 64-bit versions?
    How do I select between 32 and 64-bit operation? What's the default?
    Are both -client and -server VM modes available in 64-bit Java?
    Which components do not support 64-bit operation?
    How is native code affected?
    When writing Java code, how do I distinguish between 32 and 64-bit operation?
    Will 32-bit native code work with a 64-bit VMs?
    Where can I learn more about 64-bit programming?
    What are the performance characteristics of 64-bit versus 32-bit VMs?
    What are the default heap sizes for 64-bit VMs if GC ergonomics is not used?
    How large a heap can I create using a 64-bit VM?
    Which garbage collector should I use for very large 64-bit heaps?