有关static的练习

main方法

package 补考费;

import java.util.Scanner;

public class main {

    public static void main(String[] args){
    Scanner scan = new Scanner(System.in);

    System.out.println("请输入要创建的学生个数:");
    int length = scan.nextInt();
    Student[] stus = new Student[length];

    //初始化
    Tools.init(stus);
    //计算补考费
    Tools.fee(stus);
    //输出
    Tools.info(stus);

    scan.close();
    }
}

Student类

package 补考费;

public class Student {

    private String name;
    static String teacher = "张三";
    static int count = 0;//不及格人数
    private Course course;//课程
    static double resit;//补考费

    public Student(){ }

    public Student(String name, Course course) {
        this.name = name;
        this.course = course;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    public Course getCourse() {
        return course;
    }

    public void setCourse(Course course) {
        this.course = course;
    }

}

Course类

package 补考费;

public class Course {

    private double C;
    private double Java;

    public Course(double C,double Java){
        this.C = C;
        this.Java = Java;
    }

    public double getC() {
        return C;
    }

    public void setC(double c) {
        C = c;
    }

    public double getJava() {
        return Java;
    }

    public void setJava(double java) {
        Java = java;
    }
}

工具类Tools

package 补考费;

import java.util.Scanner;

public class Tools {
    //赋初值
    public static void init(Student[] stus){
        Scanner scan = new Scanner(System.in);
        //赋初值
        for(int i=0;i<stus.length;i++){
            System.out.println("请输入学生姓名:");
            String name = scan.next();
            System.out.println("请输入学生C的成绩:");
            double c = scan.nextDouble();
            System.out.println("请输入学生java的成绩:");
            double java = scan.nextDouble();
            Course score = new Course(c,java);
            stus[i] = new Student(name,score);
        }
        scan.close();
    }
    //计算补考费(补考费统一，当做一门20块好了)
    public static void fee(Student[] stus){
        Student.resit = 0;
        for(int i=0;i<stus.length;i++){
            if(stus[i].getCourse().getC()<60 || stus[i].getCourse().getJava()<60)
                Student.count++;
        }
        Student.resit = 20*Student.count;
    }
    //输出
    public static void info(Student[] stus){
        for (int i = 0; i < stus.length ; i++) {
            System.out.println("姓名:"+stus[i].getName()+",老师:"+Student.teacher+",C:"+stus[i].getCourse().getC()+",Java:"+stus[i].getCourse().getJava());
        }
        System.out.println("不及格的人数有:"+Student.count+"总补考费为:"+Student.resit);
    }
}