Java static关键字

package com.oop.demo07;

public class Student {
    private static int age;  //静态的变量  多线程！
    private  double score;  //非静态的变量

    public void run(){

    }
    public static void go(){

    }

    public static void main(String[] args) {
        //new Student().run();
        Student.go();  //go();





        /*Student s1 = new Student();

        System.out.println(Student.age);
       // System.out.println(Student.score);
        System.out.println(s1.age);
        System.out.println(s1.score);*/
    }
}

package com.oop.demo07;

public class Person {
    //2   赋初始值
    {
        System.out.println("匿名代码块");  //代码块（匿名代码块）
    }
    //1  只执行一次
    static {
        System.out.println("静态代码块");   //静态代码块
    }
    //3
    public Person() {
        System.out.println("构造方法");
    }

    public static void main(String[] args) {
        Person person = new Person();
        System.out.println("=============");
        Person person1 = new Person();
    }
}

static关键字的四种用法

https://www.cnblogs.com/dolphin0520/p/3799052.html

https://www.cnblogs.com/dolphin0520/p/10651845.html

https://www.cnblogs.com/heimianshusheng/p/5828844.html

static关键字