Is there a list of utf-8 unicode characters for Java 1.7 ( US-English ) that is universal ?

I have been playing around with THIS LIST , however most of the characters turn up as boxes ( missing character ), and I am afraid that other folks who use my program will not see any of the output correctly.

Thank you for your time.

Are you using a custom font?

http://docs.oracle.com/javase/7/docs/api/java/nio/charset/package-summary.html

http://stackoverflow.com/questions/6941229/how-to-identify-programmatically-in-java-which-unicode-version-supported

Nope - Java default

Edit: I am seeing if using characters from a specific default font will work better.