DATA TYPE:
Different data type allow you to select the type appropriate to the needs of the application Data type in java are classified into two types:Different type of Data types for different type of value
Different data type allow you to select the type appropriate to the needs of the application Data type in java are classified into two types:Different type of Data types for different type of value
PRIMITIVE DATA TYPES-
1)-Integer
Integer types can hold whole number such as 345 and -3435.The size of the values that values that can be stored depends on the integer type that we choose.
Type Size Default value Range of values that can be
stored
byte 1 byte 0 -128 to 127
stored
byte 1 byte 0 -128 to 127
short 2 byte 0 -32768 to 32767
int 4 bytes 0 -2,147,483,648 to
2,147,483,647
2,147,483,647
long 8 bytes 0L 9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
2)-Floating point:
Floating point data types are used to represent numbers with a fractional part.Single precision floating point number occupy 4 bytes and Double precision floating point number occupy 8 bytes.There are two subtypes:
Type Size Default value Range of values that
can be stored
float 4 byte 0.0f -3.4e-038 to 3.4e+038
can be stored
float 4 byte 0.0f -3.4e-038 to 3.4e+038
double 8 byte 0.0d 1.7e-308 to 1.7e+038
3)Character
It stored character constants in the memory.It assumes a size of 2 bytes,but basically it can hold only a single character because char stores unicode character sets.It has a minimum value of 'u0000'
and a maximum value of 'uffff'
Type Size Default value
char 2 byte '\u00000'
String null 2147483647(2pow(31)-1)
4)-Boolean
Identifiers are name provided by you.These can be assigned
to variables,method,functions,classes etc.
BOOLEAN IN THE FORM OF TRUE AND FALSE

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