Summary Numeric Data Types in JAVA

Numeric Data Types and Literals in Java
Integers

• Signed 32-bit integer, range: -2,147,483,648 to 2,147,483,647

• Use the int keyword to declare an integer variable


Floats

• IEEE 754 floating-point number, 32-bit

• Use the float keyword to declare a float variable

• Suffix with f or F to indicate a float literal


Binary, Hexadecimal, and Octal

• Binary: 0b or 0B followed by a binary number

• Hexadecimal: 0x or 0X followed by a hexadecimal number

• Octal: 0 followed by a octal number


Arbitrarily Large Numbers

• Java uses BigInteger and BigDecimal classes to handle large numbers

• These classes can be found in the java.math package


Underscore in Numeric Literals

• Numeric literals can contain underscores to improve readability
• However, underscores cannot appear at the beginning or end of the literal
• Underscores are not allowed in the decimal point

The 'E' and 'Epsilon' Notations

, • Floating-point numbers can use scientific notation with the 'E' notation
• The 'E' stands for exponent and is followed by the exponent value
• The 'epsilon' notation is used as a tolerance value in floating -point
calculations

Boolean Data Type

• Represents true or false values

• Use the boolean keyword to declare a boolean variable

• The boolean values are: true and false




Character and String Literals in Java
Character Literals

• Enclosed in single quotes ( ' )

• Represent a single character

• Can include escape sequences (e.g. \n for newline)


String Literals

• Enclosed in double quotes ( " )

• Represent a sequence of characters

• Can include escape sequences (e.g. \t for tab)


Arbitrarily Large Numbers and Java's
Implementation

• Java uses a system called automatic garbage collection