Currency sign in identifiers - what about � � � �?

Question

Is the following true for any currency sign?
[from tutorial http://www.javacertificate.com/]
An identifier is a word used by the programmer to name a variable, method, class, or label.
Identifiers can start with the currency sign $,�, but cannot start with a digit. Identifiers can start with any currency sign as long it is a Java Letter.
what about � � � �?
�_euro
�price
�ytuy978
are these valid identifiers?

Answer 1

You can test it with the method Character.isJavaIdentifierStart(char c).
And for example,
java.lang.Object \u20ac = new Object(); //the unicode escape \u20ac is for the euro symbol
System.out.println(\u20ac.toString());runs normally.