Cleaned up filename problems caused by WA upload
 $ mv boardtest.java boardTest.java
 $ mv main.java Main.java
(Note that the filenames aren't quite Java standard, e.g. BoardTest,
 and so this took me several attempts.)

Compiled via Daniel's recipe in readme.wiki
 $ export PROG_WKSHOP=/var/www/cs/htdocs/courses/spring2006/programming_workshop
 $ export JUNIT=$PROG_WKSHOP/code/junit/junit3.8.1
 $ export CLASSPATH=.:$JUNIT/junit.jar:$JUNIT/src.jar
 $ javac *.java

Running it.
 $ java boardTest
 .....
 Time: 0.01
 OK (5 tests)
 $ java Main      (X11 window pops up)