how can i get the Unicode infinity symbol converted to String

I want to use the infinity symbol (8 lying sideways) in java.

furthermore i want to use it as a String component.
i did not find a working charcode/ascii code for this (is there any?).

i tried:

String s=Character.toString(236);
String s=Character.toString('236');

am i missing something?

i got this now:

System.out.println(Character.toString('\u221E'));

but the output is ?

i am using java 1.7 jdk and eclipse. why is the infinity sign not showing up?