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VALUES AND TYPES
Learning Objectives
4.1 Character Sets in Java 4.2 How Characters are Stored in Memory?
4.3 Escape Sequences 4.4 Tokens
4.5 Data Types 4.6 Variable
4.7 Type Conversion
The foundation of all language begin with characters. Different languages have different names for characters but,
eventually it boils downs to being the smallest unit of any language.
Java is also a computer language; hence, it also has a defined character set. In this chapter, we are going to learn
more about these character sets.
4.1 CHARACTER SETS IN JAVA Definition
Writing code in Java requires different characters including
alphabets, digits and some special characters that are valid A character set is a set of letters, digits and
for the Java compiler. These are Unicode Character Sets. special characters that are supported by a
Different sets of character used in Java Language are as programming language.
follows:
CHARACTER SETS
Alphabets Digits Operators Delimiters
• Alphabets: A set of letters used while writing a language which are typically finite set of distinguishable
symbols. Java uses all English Alphabets both small and capital letters.
Uppercase/Capital Letters : A to Z (26 alphabets)
Lowercase/Small Letters : a to z (26 alphabets)
Values and Types 53

