java学生管理系统
Java_coder_guan 人气:0编写一个学生成绩管理程序。学生的属性包括学号、姓名、年龄等。每个学生要学习若干课程，每门课程有平时成绩、期中考试成绩、实习成绩、期末考试成绩以及总评成绩等多个成绩，其中平时成绩的数目不定（因为不同课程的教师布置的平时作业数不同），而总评成绩是其它成绩的平均值。请先设计合理的对象容器类存放这些信息，然后设计程序完成以下功能：
1）列出某个学生的所有成绩；
2）列出某门课程每个学生的总评成绩，及所有学生总评成绩的总评分；
3）分区段统计某门课程的学生总评成绩，例如60 分以下的学生人数、60 至70 分的学生人数等。
Student类：
package homework032002;
import java.util.ArrayList;
public class Student {
private String name;
private String no;
private int age;
private ArrayList<Grade> Grade;
public ArrayList<Grade> getCourses() {
return Grade;
}
public void setCourses(ArrayList<Grade> Grade) {
this.Grade = Grade;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Student [name=" + name + ", no=" + no + ", age=" + age + ", course=" + Grade + "]";
}
public Student(String name, String no, int age, ArrayList<Grade> Grade) {
super();
this.name = name;
this.no = no;
this.age = age;
this.Grade = Grade;
}
public Student() {
super();
// TODO Auto-generated constructor stub
}
}Function类：（功能封装在此类中）：
package homework032002;
import homework032002.Grade;
import java.util.ArrayList;
public class Function {
//static ArrayList<Grade> arrayList = new ArrayList<>();
//static ArrayList<Student> arrayList2 = new ArrayList<>();
private ArrayList<Student> arrayList2;
public Function(ArrayList<Student> arrayList) {
super();
this.arrayList2 = arrayList;
}
//根据名字搜索该学生的成绩
public void show(String name) {
for (Student s : arrayList2) {
if(s.getName().equals(name)) {
ArrayList<Grade> course = s.getCourses();
System.out.println("该学生的成绩是：");
for(Grade grade : course) {
System.out.println(grade);
}
break;
}
}
}
//列出某门课程每个学生的总评成绩，及所有学生总评成绩的总评分
public void showOneSum(String courseName) {
double sumGrade = 0;
int num = 0;
for(Student student : arrayList2) {
ArrayList<Grade> grades = student.getCourses();
for(Grade grade : grades) {
if(courseName.equals(grade.getCourse())) {
num++;
sumGrade += grade.getSumGrade();
System.out.println(student.getName()+"的总评分是"+grade.getSumGrade());
}
}
}
System.out.println("所有学生的总评分是："+sumGrade/num);
}
//分区段统计某门课程的学生总评成绩，例如60 分以下的学生人数、60 至70 分的学生人数等
public void selectGrade(String courseName) {
int down60 = 0;
int down60_70 = 0;
for(Student student : arrayList2) {
ArrayList<Grade> grades = student.getCourses();
for(Grade grade : grades) {
if(courseName.equals(grade.getCourse())) {
if(grade.getSumGrade() < 60) {
down60++;
}else if (grade.getSumGrade() > 60 || grade.getSumGrade() <70) {
down60_70++;
}
}
}
}
System.out.println("60分以下的有"+down60+"人");
System.out.println("60-70分以下的有"+down60_70+"人");
}
}Grade类：（课程类）
package homework032002;
//每门课程有平时成绩、期中考试成绩、实习成绩、期末考试成绩以及总评成绩等多个成绩
public class Grade {
private String course;
private int dailyGrade;
private int midGrade;
private int doGrade;
private int endGrade;
public String getCourse() {
return course;
}
public void setCourse(String course) {
this.course = course;
}
public Grade(String course, int dailyGrade, int midGrade, int doGrade, int endGrade, double sumGrade) {
super();
this.course = course;
this.dailyGrade = dailyGrade;
this.midGrade = midGrade;
this.doGrade = doGrade;
this.endGrade = endGrade;
this.sumGrade = sumGrade;
}
public int getDailyGrade() {
return dailyGrade;
}
public void setDailyGrade(int dailyGrade) {
this.dailyGrade = dailyGrade;
}
private double sumGrade;
public int getMidGrade() {
return midGrade;
}
public void setMidGrade(int midGrade) {
this.midGrade = midGrade;
}
public int getDoGrade() {
return doGrade;
}
public void setDoGrade(int doGrade) {
this.doGrade = doGrade;
}
public int getEndGrade() {
return endGrade;
}
public void setEndGrade(int endGrade) {
this.endGrade = endGrade;
}
public double getSumGrade() {
return sumGrade;
}
public void setSumGrade(double sumGrade) {
this.sumGrade = sumGrade;
}
@Override
public String toString() {
return "Grade [course=" + course + ", dailyGrade=" + dailyGrade + ", midGrade=" + midGrade + ", doGrade="
+ doGrade + ", endGrade=" + endGrade + ", sumGrade=" + sumGrade + "]";
}
}测试类：
package homework032002;
import java.util.ArrayList;
public class Test {
public static void main(String[] args) {
ArrayList<Student> students = new ArrayList<>();
ArrayList<Grade> grades = new ArrayList<>();
students.add(new Student("小明", "12", 13, grades));
grades.add(new Grade("高数", 50, 95, 45, 78, 76));
grades.add(new Grade("语文", 50, 95, 45, 78, 76));
grades.add(new Grade("英语", 50, 95, 45, 78, 76));
grades.add(new Grade("计算机", 50, 95, 45, 78, 76));
ArrayList<Grade> grades1 = new ArrayList<>();
students.add(new Student("小红", "12", 13, grades1));
grades1.add(new Grade("高数", 50, 95, 45, 78, 76));
grades1.add(new Grade("语文", 50, 95, 45, 78, 76));
grades1.add(new Grade("英语", 50, 95, 45, 78, 76));
grades1.add(new Grade("计算机", 50, 95, 45, 78, 76));
ArrayList<Grade> grades2 = new ArrayList<>();
students.add(new Student("小上", "12", 13, grades2));
grades2.add(new Grade("高数", 50, 95, 45, 78, 76));
grades2.add(new Grade("语文", 50, 95, 45, 78, 76));
grades2.add(new Grade("英语", 50, 95, 45, 78, 76));
grades2.add(new Grade("计算机", 50, 95, 45, 78, 76));
ArrayList<Grade> grades3 = new ArrayList<>();
students.add(new Student("小蓝", "12", 13, grades3));
grades3.add(new Grade("高数", 50, 95, 45, 78, 76));
grades3.add(new Grade("语文", 50, 95, 45, 78, 76));
grades3.add(new Grade("英语", 50, 95, 45, 78, 76));
grades3.add(new Grade("计算机", 50, 95, 45, 78, 76));
Function function = new Function(students);
function.show("小明");
function.showOneSum("计算机");
function.selectGrade("高数");
}}
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