Different types of data in java.

Different types of data in java.

Java defines eight simple (or elemental) types of data: byte, short, int, long, char, float,

double, and boolean. These can be put in four groups:

■ Integers This group includes byte, short, int, and long, which are for wholevalued

    signed numbers.

    byte => 8 bits

    short => 16 bits

    int => 32 bits

    long => 64 bits

■ Floating-point numbers This group includes float and double, which represent

    numbers with fractional precision.

    Float => 32 bits

    Double => 64 bits

■ Characters This group includes char, which represents symbols in a character

    set, like letters and numbers.

        Char => 16 bits

                Java uses Unicode to represent characters. Unicode defines a fully international character set that can represent all of the characters found in all human languages. It is a unification of dozens of character sets, such as Latin, Greek, Arabic, Cyrillic, Hebrew, Katakana, Hangul, and many more. For this purpose, it requires 16 bits. Thus, in Java char is a 16-bit type.

■ Boolean This group includes boolean, which is a special type for representing true/false

values.