创建5个学生对象给一个学生数组赋值，每个学生属性包括：学号、姓名、年龄。请根据【模版一】，将【代码1】到【代码6】替换为Java程序代码，以实现如下要求：

（1）将学生按学号排序输出；

（2）统计大于20岁的学生人数；

-Create 5 students object to a student assignment of array, each student attributes include: Student ID, name, age.According to [a]. [1], the code to [6] code is substituted for the Java program code, to achieve the following requirements:

(1) the students at school

(2) statistics for more than 20 years the number of students