How to use the static modifier in java

This article mainly explains "how to use the static modifier in java". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to use the static modifier in java".

1. The static keyword is used to declare static variables independent of the object. No matter how many objects a class instantiates, its static variable has only one copy. Static variables are also called class variables. Local variables cannot be declared as static variables.

2. The static keyword is used to declare static methods independent of the object.

Example

Class InstanceCounter {private static int num = 540; / / Private static variable public static int getNum () {/ / Public static method return num;} / / the constructor can automatically execute the constructor using the same public InstanceCounter () {System.out.println (this.getNum ()) in this as in es6. / / this.getNum () = = getNum () this.num++; / / this.num = = num}} public class demo1 {public static void main (String [] args) {new InstanceCounter (); System.out.println (InstanceCounter.getNum ()) / print static method class name call 541}} Thank you for reading, this is the content of "how to use the static modifier in java". After the study of this article, I believe you have a deeper understanding of how to use the static modifier in java, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!