Java Static keyword

1.static member variables

• A static variable is also called a class variable, and all instances access the same variable
• static final is used to define constants, usually named with uppercase and underlined.

 Packagecn.lz.base;/*** Static keywords *@authorlzzz **/ Public classJ17100803 {intID = 1; Static intIDD = 2;  Public Static voidMain (string[] args) {J17100803 J1=NewJ17100803 (); J17100803 J2=NewJ17100803 (); J1.idd+ = 1; J2.idd+ = 1; J1.id+ = 1; J2.id+ = 1; System.out.println (j1.id); //2System.out.println (J1.idd);//4System.out.println (j2.id);//2System.out.println (J2.idd);//4System.out.println (J17100803.idd);//can be accessed by classname. Variable name    }}

2.static method

The static method of the public adornment can be accessed through the class name. Variable name

3.static Domain

• The static field is only executed once during the class load time
• {} non-static initialization code block is executed before the constructor

4. Static Import

 Package cn.lz.base; Import static java.lang.math.*; /**  @author*/Publicclass  J17100803    {  publicstaticvoid  main (string[] args) {        System.out.println (ABS (//  }    }

Java Static keyword