JAVA Programming : Data Types

JAVA Data Types

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Java has a number of data types below is the complete list of them . Although syntax of Java is largely derived from C++ but datatypes are a bit different from C for example C does not have Boolean data type. Java Datatypes have a fixed size and also some default values that will bet set to variables if they are declared but not initialized.

• Boolean : Boolean datatype does not have a specific size declared but conceptually it has one bit value. Boolean datatypes has only two possible values true or false. Default value for Booleans are false.
  Size:- not defined 
  Values:- true or false 
  Default value:- false
• Char: A char is 16 bit value that can be treated like an integer value but is intended to hold characters. In a Java program a char datatype is always interpreted as a numeric value of a displayable character. 
  Size:- 16 bit
  Values:- from 0 to 65535
  Default value:- 0
• Byte: A byte is an 8 bit integer value.
  Size:- 8 bit
  Values:- from -128 to 127
  Default value:- 0
• Sort: A sort is an 16 bit integer value.
  Size:- 16 bit
  Values:- from -32768 to 32767 
  Default value:- 0
• Int: A int is an 32 bit integer value.
  Size:- 32 bit
  Values:- from -2147483648 to 2147483647
  Default value:- 0
• long: A Long is an 64 bit integer value and it is the largest of all the integer types. 
  Size:- 64 bit
  Values:- from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
  Default value:- 0
• float: A float is 32 bit single precision floating point decimal number.
  Size:- 32 bit
  Values:- from -1.4E-45 to 3.4028235E38 
  Default value:- 0.0
• double: Double is 64 bit double precision floating point decimal number.
  Size:- 64 bit
  Values:- from -4.9E-324 to 1.7976931348623157E308 
  Default value:- 0.0