Oracle's Java Runtime Environment (JRE) for 64-bit Windows PCs contains the Java Virtual Machine, software libraries, components, and plug-ins that tons of programs, media, and Web sites need to display advanced multimedia content and animation. Version 7 Update 55 of Java's Standard Edition addresses 37 security vulnerabilities while reducing the frequency of security notifications in certain installations.
Answers the 64-bit question: Running 32-bit Java on 64-bit Windows involves compromises, such as Update issues. This version of Java is designed specifically for 64-bit Windows.
Plug-ins: The Java plug-in is critical to many Web applications, while Java Web Start deploys standalone apps over networks.
JavaFX: JRE now includes Java FX version 2.2.55.
Security: Some computer experts warn of vulnerabilities in Java that updates have failed to correct.
8 is enough? Java SE 8 is a major update that was released prior to version 7.55's release, though a major security update to version 8 has also been released. Confused? We don't blame you, but Java always bears watching, so check on your system's needs before upgrading.
If you're running 64-bit Windows, check your Java version and update it if necessary to JRE SE 7.55 for security and stability.
From Sun Microsystems:
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.
What's new in this version:
This version contains IANA time zone data version 2015a.
JavaFX version 2.2.79.
This release contains fixes for security vulnerabilities.