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
stu.java

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

main.java

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