Java Fundamentals (ii) data types

Tag: Encode a false constant logical short unit double 32 bits

First, the data type

Java is a strongly typed language, which means that one type must be declared for each variable. In Java, there are 8 basic types, of which 4 are integers, 2 floating-point types, 1 character types used to represent Unicode-encoded character cells, char, and 1 Boolean types used to represent truth values.

1. Integral type

BYTE 8-bit 1-byte

Short 16-bit 2-byte

int 32 bit 4 byte

Long 64-bit 8-byte

2. Floating-point type

Float 32-bit 4 bytes

Double 64-bit 8-byte

3.char type

The char type is originally used to represent a single character. Today, Unicode characters can be described with a char value, for example ' A ' is a character constant corresponding to the encoded value of 65. Some special escape characters can also be represented.

4.boole type

The Boolean type has two values: false and True, which are used to determine the logical condition. An integer value and a Boolean value cannot be converted to and from each other.

　　

Java Fundamentals (ii) data types