The Static keyword in Java

Features of the Static keyword

1. Loaded with the load of the class;
2. Precedence over the existence of objects;
3. Be shared by all objects of the class;
4. Can be called by the class name;

Memory Diagram Construction code block

Constructing a code block takes precedence over the construction method execution, and creating an object executes once;

publicclass User {    privateint age;    publicUser(int age) {        System.out.println("构造方法执行");        this.age = age;    }    publicintgetAge() {        return age;    }    publicvoidsetAge(int age) {        this.age = age    }    {         System.out.println("构造代码块执行");    }    }

Output Result:

Constructing code block execution
Construction method Execution

Final keyword

1. In inheritance, when a method of the parent class is modified with final, the subclass inherits the parent class, and the subclass cannot modify the final decorated method in the parent class;

The Static keyword in Java