Literals are numbers, characters, and string representations in your program. Literals can be classified as numeric literals, character literals and string literals.

The line separator is the name given to the character or characters used to separate lines of text, and vary from platform to platform.

Charset is a combination of a coded character set and a character-encoding scheme. Here ‘set’ refers to the set of characters and their numbers (code points), and ‘encoding’ refers to the representation of these code points. We will also discuss common encoding related errors.

All Unicode characters can be used in comments, character and string literals in java. Unicode characters can be expressed through Unicode Escape Sequences. 

Unicode escape sequences consist of

Unicode is a computing industry standard for the consistent encoding, representation and handling of text expressed in most of the world's writing systems. The objective of Unicode is to unify all the different encoding schemes so that the confusion between computers can be limited as much as possible. Currently the Unicode standard defines values for over 100,000 characters.