After adding a JDK you may want to add the /usr/java/j2sdXXX/bin directory to the PATH for each user modify the /etc/profile to do this and add
export PATH=$PATH:/usr/java/j2sdXXX/bin

to count line entries use wc (work cout)
netstat -a | grep CLOSE_WAIT | wc -l (this will count the number of CLOSE_WAIT sockets)

lsof Lsof lists information about open files

Solaris 8 Notes:
Instead of top the new utility is prstat