I ran up against that problem too. Most likely these are "common" Java values so it didn't seem necessary to include in the JavaStar documentation. Good thing there are Forums such as provided by BetaSoft to fill in the blanks left by Sun...
Here's some values you can use, you can find the rest by recording clicks while holding down the various keys, such as CONTROL, ALT, etc. while clicking in some component.
16 - this is normal click ( no keys pressed )
1 - pressing SHIFT while clicking
2 - pressing CONTROL while clicking
8 - presing ALT key while clicking