what is unicode and non unicode characters code example

Example: what is unicode

Unicode is a character set developed by Unicode Consortium. 
To support all languages in the world Java
supports Unicode values. Unicode characters were represented by 16 bits 
and its character range is 0- 65,535.
Java uses ASCII code for all input elements except for Strings,identifiers, 
and comments. If we want to use telugu we can use telugu characters for 
identifiers. We can enter comments in telugu.