Java課設(shè)-學(xué)生成績管理系統(tǒng)-創(chuàng)新互聯(lián)

題目要求：
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代碼：

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Student.java:

public class Student {private long id;//學(xué)號
    private String name;//姓名
    private double math;//應(yīng)用數(shù)學(xué)成績
    private double English;//大學(xué)英語成績
    private double Java;//java成績
    private double computer;//計算機應(yīng)用基礎(chǔ)
    private double average;    //平均分
    private int n;  //總?cè)藬?shù)
    public double getAverage() {return average;
    }

    public void setAverage(double average) {this.average = average;
    }

    public Student(int n,long id, String name, double math, double english, double java, double computer, double average) {this.n = n;
    	this.id = id;
        this.name = name;
        this.math = math;
        this.English = english;
        this.Java = java;
        this.computer = computer;
        this.average=average;
    }
	public Student() {}

	public int getNum() {return n;
    }

    public void setNum(int n) {this.n = n;
    }
    public long getId() {return id;
    }

    public void setId(long id) {this.id = id;
    }

    public String getName() {return name;
    }

    public void setName(String name) {this.name = name;
    }

    public double getMath() {return math;
    }

    public void setMath(double math) {this.math = math;
    }

    public double getEnglish() {return English;
    }

    public void setEnglish(double English) {this.English = English;
    }

    public double getJava() {return Java;
    }

    public void setJava(double Java) {this.Java = Java;
    }

    public double getComputer() {return computer;
    }

    public void setComputer(double computer) {this.computer = computer;
    }
    public double getAvg(Student student) {return ( (student.getMath() + student.getEnglish() + student.getJava() + student.getComputer())/4);

    }
    public void setAvg(double average) {this.average=average;
    }
}

StudentApplication.java:

public class StudentApplication {public static Scanner scanner = new Scanner(System.in);
    public static ArrayListstudents = new ArrayList<>();
    public static void main(String[] args) {Student student = new Student();
        StudentManage sm=new StudentManage();
        while(true){   int menuSelect=StudentManage.getMenu();
           switch (menuSelect){   case 1://輸入學(xué)生相關(guān)信息
                   sm.addStudent(students);
                   break;
                case 2://2按平均分降序排列
                    sm.sortStudent(students);
                    break;
               case 3:// 3顯示所有成績
                   sm.showAllStudent(students);
                   break;
                case 4: //4輸入查詢個人成績
                    sm.searchStudent(students);
                    break;
                case 5://5顯示各科平均分，最高分，最低分
                	sm.averageScore(students);
                	break;
                case 6://6退出成績管理系統(tǒng)
                    System.out.println("即將退出成績管理系統(tǒng)");
                    System.exit(0);
               default:
                   System.out.println("請重新輸入");

                   break;

            }
        }

    }
}

StudentManage.java:

public class StudentManage {private static Scanner sc=new Scanner(System.in);

    //得到菜單
    public static int getMenu(){System.out.println("----------學(xué)生成績管理系統(tǒng)----------");
        System.out.println("          1輸入學(xué)生相關(guān)信息");
        System.out.println("          2按平均分降序排列");
        System.out.println("          3顯示所有成績");
        System.out.println("          4輸入查詢個人成績");
        System.out.println("          5顯示各科平均分，最高分，最低分");
        System.out.println("          6退出成績管理系統(tǒng)");
        System.out.println("----------學(xué)生成績管理系統(tǒng)----------");
        System.out.println("請選擇菜單：");
        int select=StudentManage.sc.nextInt();
        return select;
    }
    //添加學(xué)生
    public   void addStudent(ArrayListstudents){Student student=new Student();
        System.out.println("請輸入學(xué)生的學(xué)號");
        student.setId(sc.nextLong());
        System.out.println("請輸入學(xué)生的姓名");
        student.setName(sc.next());
        System.out.println("請輸入學(xué)生的應(yīng)用數(shù)學(xué)成績");
        student.setMath(sc.nextDouble());
        System.out.println("請輸入學(xué)生的大學(xué)英語成績");
        student.setEnglish(sc.nextDouble());
        System.out.println("請輸入學(xué)生的java程序設(shè)計成績");
        student.setJava(sc.nextDouble());
        System.out.println("請輸入學(xué)生的計算機應(yīng)用基礎(chǔ)成績");
        student.setComputer(sc.nextDouble());
        double avg = student.getAvg(student);
        student.setAverage(avg);
        students.add(student);
        //        提示信息
        System.out.println("添加成功");
    }
    //查詢學(xué)生
    public void searchStudent(ArrayListstudents){if (students.size() == 0) {System.out.println("當(dāng)前無數(shù)據(jù)，請?zhí)砑雍笾卦?);
        } else {System.out.println("請輸入要查找學(xué)生的學(xué)號：");
            long id = sc.nextLong();
            int flag = -1;
            Student student = new Student();
            //        查找對應(yīng)學(xué)號，找到就退出
            for (int i = 0; i< students.size(); i++) {student = students.get(i);
                if (student.getId() == id) {flag = i;
                    break;
                }
            }

            if (flag == -1) {System.out.println("未找到對應(yīng)學(xué)號的學(xué)生，請確認(rèn)后重新輸入！");
            } else {System.out.println("對應(yīng)學(xué)號的學(xué)生成績?nèi)缦拢?);
                System.out.println("學(xué)號\t\t\t姓名\t\t數(shù)學(xué)\t\t英語\t\tJava\t\tcomputer\t\t平均分\t\t");
                System.out.format("%d\t%s\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n", student.getId(), student.getName(), student.getMath(), student.getEnglish(), student.getJava(),student.getComputer(), student.getAvg(student));
                System.out.println("查找信息成功！");
            }
        }
    }
    //按平均分排降序
    public void sortStudent(ArrayListstudents){if (students.isEmpty()) {System.out.println("當(dāng)前無數(shù)據(jù)，請?zhí)砑雍笾卦?);
        } else {for (int i = 0; i< students.size() - 1; i++) {if (students.get(i).getAvg(students.get(i))< students.get(i + 1).getAvg(students.get(i + 1))) {Student tmp = students.get(i);
                    students.set(i, students.get(i + 1));
                    students.set(i + 1, tmp);
                }
            }

            System.out.println("排序后的學(xué)生成績");
            System.out.println("學(xué)號\t\t姓名\t\t數(shù)學(xué)\t\t英語\t\tJava\t\t計算機\t\t平均分");
            for (Student student : students) {System.out.format("%d\t%s\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\t\n",  student.getId(), student.getName(), student.getMath(), student.getEnglish(),  student.getJava() ,student.getComputer(), student.getAvg(student));
            }
        }
    }
    //顯示所有成績
    public void showAllStudent(ArrayListstudents){if (students.isEmpty()) {System.out.println("當(dāng)前無數(shù)據(jù)，請先添加數(shù)據(jù)");
        } else {System.out.println("----------所有學(xué)生成績?nèi)缦?---------");
            System.out.println("學(xué)號\t\t姓名\t\t數(shù)學(xué)\t\t英語\t\tJava\t\t計算機\t\t平均分");
            for (Student student : students) {System.out.format("%d\t%s\t%.2f\t%.2f\t%.2f\t%.2f\t%.2f\n", student.getId(), student.getName(), student.getMath(), student.getEnglish(), student.getJava(),student.getComputer(), student.getAvg(student));
        }
        }
    }
    //各科平均分，最高分，最低分
        public void averageScore(ArrayListstudents){int n = students.size();
        double max1 = 0;
		double min1 = students.get(0).getMath();;
        double sum1 = 0;
        for (int i = 0; i< n; i++) {	sum1 = sum1 + students.get(i).getMath();
        	 if (students.get(i).getMath() >max1) { max1 = students.get(i).getMath();
             }
            if (students.get(i).getMath()< min1) {min1 = students.get(i).getMath();
            }
        	}
        System.out.println("應(yīng)用數(shù)學(xué)的平均成績="+sum1/n+" 最高成績="+max1+" 最低成績="+min1);
        
        double max2 = 0;
		double min2 = students.get(0).getEnglish();;
        double sum2 = 0;
        for (int i = 0; i< n; i++) {	sum2 = sum2 + students.get(i).getEnglish();
        	if (students.get(i).getEnglish() >max2) {max2 = students.get(i).getEnglish();
            }
            if (students.get(i).getEnglish()<= min2) {min2 = students.get(i).getEnglish();
            }
        	}
        System.out.println("大學(xué)英語的平均成績="+sum2/n+" 最高成績="+max2+" 最低成績="+min2);
        
        double max3 = 0;
		double min3 = students.get(0).getJava();;
        double sum3 = 0;
        for (int i = 0; i< n; i++) {	sum3 = sum3 + students.get(i).getJava();
        	 if (students.get(i).getJava() >max3) { max3 = students.get(i).getJava();
             }
            if (students.get(i).getJava()<= min3) {min3 = students.get(i).getJava();
            }
        	}
        System.out.println("Java的平均成績="+sum3/n+" 最高成績="+max3+" 最低成績="+min3);
        
        double max4 = 0;
		double min4 = students.get(0).getComputer();;
        double sum4 = 0;
        for (int i = 0; i< n; i++) {	sum4 = sum4 + students.get(i).getComputer();
        	 if (students.get(i).getEnglish() >max4) { max4 = students.get(i).getComputer();
             }
            if (students.get(i).getComputer()<= min4) {min4 = students.get(i).getComputer();
            }
        	}
        System.out.println("計算機應(yīng)用基礎(chǔ)的平均成績="+sum4/n+" 最高成績="+max4+" 最低成績="+min4);
        }
}

運行主界面：
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