thesource@localhost ~ $ eselect java-vm
Usage: eselect java-vm <action> <options>

Standard actions:
  help                      Display help text
  usage                     Display usage information
  version                   Display version information

Extra actions:
  list                      List Available Virtual Machines
  set                       Set a new system-vm
  show                      Show the current vm
thesource@localhost ~ $ eselect java-vm list
Available Java Virtual Machines:
  [1]   sun-jdk-1.5 
  [2]   sun-jre-bin-1.6 
thesource@localhost ~ $ eselect java-vm set 2
!!! Error: Usage [user|system] [vm]
Killed
thesource@localhost ~ $ eselect java-vm set 2
!!! Error: Usage [user|system] [vm]
Killed
thesource@localhost ~ $