静态方法（有static)和非静态方法

有static

public class Main {
    public static void main(String[] args) {
        say();
       }
    public static void say()
    {
        System.out.println("xuesheng");
    }
}

没有static

package org.example;
import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        stu stu1=new stu();
       stu1.say();
       }

}
class stu {
    public void say()
    {
        System.out.println("xuesheng");
    }
}