Our next JDK 7 release (JDK 7u40) will provide support for hardfloat Linux/ARM, which means you will be able to use it with Raspbian. Early access binaries are available here:
Use the Linux ARM 32-bit HardFP one for Raspbian, and the SoftFP one for Wheezy.
This EA should include full Swing/AWT support. Performance should be top notch compared to other JVMs. JavaFX is not included - that is introduced in JDK 8 (also available in early access).
Henrik (Oracle Java team)