Java - Data Types

Java has 8 primitive data types. Each one primitive type will have wrapper class available from java.lang.(will discuss in java.lang package).

Following list provides the primitive types and their wrapper classes.

     Integer based       Float based     Other

     int(Integer)        float(Float)    char(Character)

     long(Long)          double(Double)  boolean(Boolean)

     short(Short)

     byte(Byte)

The following table illustrates the data types and their size, ranges.

In true, false can’t be represented as 1,0 in java.

Data Type	Width(bit)	Range
int	32(4 byte)	-2,147,483,648 to 2,147,483,647
long	64(8 byte)	-9,223,372,036,854,775,808 to  9,223,372,036,854,775,807
short	16(2byte)	-32,768 to 32,767
byte	8(1 byte)	-128 to 127
double	64(8 byte)	4.9e-324 to 1.8e+308
float	32(4 byte)	1.4e-045 to 3.4e+308
char	16(2 byte)
boolean		true, false