There are mainly two type of datatype:
- Primitive
- Non-primitive
Primitive:
They are of two types:
- Numeric
- Non-numeric
now,
Numeric :
They are of two types:
- Numeric
- Non-numeric
- Integer
- Floating point
- Integer
- Floating point
Non-numeric:
They are of two types:
- Character
- Boolean
- Character
- Boolean
Non-primitive:
They are of three types:
- Class
- Array
- Interface
explanation
INTEGER -Integer are whole number
byte 1 byte 0 -128 to 127
short 2 byte 0 -32768 to 32767
int 4 byte 0 -2147483648 to 2147483647
long 8 byte 0 -9223372036854775808 to 9223372036854775807
FLOATING POINT-A number containing fractional part
Data type Size Default Range
float 4 byte 0.0 3.40282347 x 1038, 1.40239846 x 10-45
double 8 byte 0.0 1.7976931348623157 x 10308, 4.9406564584124654 x 10-32
CHARACTER-A single character that is a letter ,a digit,a punctuation mark,a tab,a space and some thing similar to it.
Data type Size Default Range
char 2 byte \u0000 \u0000 to \uFFFF
BOOLEAN-Boolean are logical variable which can contain either TRUE/FALSE
Data type Value Default
char TRUE(1)/FALSE(0) FALSE
Data type Size Default Range
float 4 byte 0.0 3.40282347 x 1038, 1.40239846 x 10-45
double 8 byte 0.0 1.7976931348623157 x 10308, 4.9406564584124654 x 10-32
CHARACTER-A single character that is a letter ,a digit,a punctuation mark,a tab,a space and some thing similar to it.
Data type Size Default Range
char 2 byte \u0000 \u0000 to \uFFFF
BOOLEAN-Boolean are logical variable which can contain either TRUE/FALSE
Data type Value Default
char TRUE(1)/FALSE(0) FALSE
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