Unlike the u17, the u18 update is not released for security, instead, it introduces many improvements on performance.
Faster Jar File Creation If you application need to create a lot of jar files, you will see about 20 percent improvement.
Hotspot VM Enhancement This includes some hardware-aware features, garbage collection improvements, class loading optimization and compile time optimization on code generation. The improved G1 garbage collector is still not yet ready for production, unless you have business support contract with Sun.
Application Startup Time Improvements If you are using JavaFX, you will notice about 20 percent improvement when launching an FX application. Web start and applet application can now download jar files concurrently.
Other improvements include runtime UI application performance, zip file reading and deployment updates. For more info, please check out here.
JavaFX Plug-in for Eclipse 3.5.x
javaFX used in Winter Olympics 2010
Review on Essential JavaFX
Australian Citizenship Test
Free British citizenship Test
US Citizenship Application