Full details available on the SWTJar Site
I made a small edit to allow adding multiple architectures for Linux. I don't imagine that an SWT JAR for x86-based Linux will work on PowerPC.
SWT filenames should be named as such:
- Linux:
swt-linux-{ARCH}-{SWT VERSION}.jar - Mac:
swt-mac-x86_64-{SWT VERSION}.jar - Windows:
swt-win-{ARCH}-{SWT VERSION}.jar
For the architecture, i386 and x86 are treated as synonyms. In addition, x86-64, x86_64, and amd64 are also synonyms for each other.