用java写一个分班算法 要求男女平均 成绩A-E平均 双胞胎要在同一个班 400个同学分成8个班级

下面是一个简单的Java实现，假设有一个Student类表示学生，包含学生的姓名、性别、成绩等信息。另外，假设学生已经按照成绩排序，成绩从高到低。

import java.util.ArrayList;
import java.util.List;

class Student {
    String name;
    String gender;
    int score;

    public Student(String name, String gender, int score) {
        this.name = name;
        this.gender = gender;
        this.score = score;
    }

    public String getName() {
        return name;
    }

    public String getGender() {
        return gender;
    }

    public int getScore() {
        return score;
    }
}

public class ClassAssignment {

    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();
        // 假设有一个包含所有学生的列表

        List<List<Student>> classes = assignClasses(students, 8);
        for (int i = 0; i < classes.size(); i++) {
            System.out.println("Class " + (i + 1) + ":");
            for (Student student : classes.get(i)) {
                System.out.println(student.getName() + " (" + student.getGender() + ", " + student.getScore() + ")");
            }
            System.out.println();
        }
    }

    public static List<List<Student>> assignClasses(List<Student> students, int numClasses) {
        List<List<Student>> classes = new ArrayList<>();
        for (int i = 0; i < numClasses; i++) {
            classes.add(new ArrayList<>());
        }

        int numStudentsPerClass = students.size() / numClasses;
        int currentClass = 0;
        int maleCount = 0;
        int femaleCount = 0;
        int[] gradesCount = new int[5];

        for (Student student : students) {
            if (classes.get(currentClass).size() >= numStudentsPerClass) {
                currentClass++;
            }

            // 检查是否双胞胎
            if (student.getName().endsWith("A") && classes.get(currentClass).size() > 0 &&
                    classes.get(currentClass).get(classes.get(currentClass).size() - 1).getName().endsWith("A")) {
                currentClass++;
            }

            // 检查男女平均
            if (student.getGender().equals("Male") && maleCount >= numStudentsPerClass / 2) {
                currentClass++;
                maleCount = 0;
                femaleCount = 0;
            } else if (student.getGender().equals("Female") && femaleCount >= numStudentsPerClass / 2) {
                currentClass++;
                maleCount = 0;
                femaleCount = 0;
            }

            // 检查成绩平均
            gradesCount[student.getScore() - 1]++;
            boolean needToChangeClass = false;
            for (int count : gradesCount) {
                if (count > numStudentsPerClass / 5) {
                    needToChangeClass = true;
                    break;
                }
            }
            if (needToChangeClass) {
                currentClass++;
                for (int j = 0; j < gradesCount.length; j++) {
                    gradesCount[j] = 0;
                }
            }

            classes.get(currentClass).add(student);

            if (student.getGender().equals("Male")) {
                maleCount++;
            } else {
                femaleCount++;
            }
        }

        return classes;
    }
}

请注意，这只是一个简单的示例实现，可能无法处理所有边界情况。在实际应用中，可能需要更复杂的算法来处理更多的约束条件。