What are the basic data types of Java?

Java basic data types include integer, floating point, character, Boolean and reference types. Java is an object-oriented high-level programming language that provides rich data types to support different data operations and storage requirements. By using these basic data types, Java programmers can flexibly handle different types of data and perform various calculations and operations. It should be noted that different data types differ in storage space and value range, and programmers need to choose the appropriate data type according to actual needs.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

Java is an object-oriented high-level programming language that provides rich data types to support different data operations and storage requirements. Below I will introduce the basic data types in the Java language in detail.

Java’s basic data types can be divided into the following categories:

1. Integer (Integer):

- byte: 1 byte, used to represent a larger range A small integer, ranging from -128 to 127.

- short: 2 bytes, used to represent a short integer, the value range is -32768 to 32767.

- int: 4 bytes, used to represent integers, the value range is -2147483648 to 2147483647.

- long: 8 bytes, used to represent a long integer, the value range is -9223372036854775808 to 9223372036854775807.

2. Floating-point:

- float: 4 bytes, used to represent single-precision floating-point numbers, with a value range of approximately ±3.40282347E 38F (valid bits The number is 6-7 digits).

- double: 8 bytes, used to represent double-precision floating point numbers, with a value range of approximately ±1.79769313486231570E 308 (the number of effective digits is 15 digits).

3. Character type (Character):

- char: 2 bytes, used to represent a single character, the value range is 0 to 65535, and can represent Unicode characters.

4. Boolean:

- boolean: a value used to represent true or false.

5. Reference type (Reference):

- The reference type is a special data type used to store references to objects. Classes, interfaces, and arrays in Java are all reference types.

It should be noted that Java’s basic data types are all value types. They store data values ​​directly in memory instead of references. This is different from reference types, which store the reference address of an object in memory.

In addition, Java also provides a special data type: void type (Void). The empty type means no value and is usually used to indicate that a method has no return value.

By using these basic data types, Java programmers can flexibly handle different types of data and perform various calculations and operations. It should be noted that different data types differ in storage space and value range, and programmers need to choose the appropriate data type according to actual needs. At the same time, Java also supports operations such as automatic type conversion and forced type conversion to convert data between different types.

In summary, Java’s basic data types include integers, floating point types, character types, Boolean types and reference types. By properly selecting and using these data types, efficient and reliable Java programs can be written.

The above is the detailed content of What are the basic data types of Java?. For more information, please follow other related articles on the PHP Chinese website!