java学生类咨询

[qq_41000798]

DEMO要求：
初始化：
1、构建学生类，学生信息包含：ID、姓名、性别、年龄、语文成绩、数学成绩；
2、初始化学生信息（10个人）
输出：
1、输出所有学生的基本信息；
2、输出总分成绩在前五名的学生姓名；
3、学生数学成绩按从高到低排序，输出排序结果



我现在的进程

import java.util.ArrayList;

public class Outputproblem {
private static ArrayList<Student> studentList = new ArrayList<>();

public static void main(String[] args) {
// 1，初始化学生信息
initstudentinfo();
// 2,输出所有学生的基本信息；
outputstudent();
// 3,输出总分成绩在前五名的学生姓名；
outputTop5();
// 4,学生数学成绩按从高到低排序，输出排序结果
outputRank();

}

private static void outputRank() {
// TODO Auto-generated method stub

}

private static void outputTop5() {
// TODO Auto-generated method stub

}

private static void outputstudent() {
for (Student student :studentList ) {
System.out.println(student.toString());
}
// TODO Auto-generated method stub

}

private static void initstudentinfo() {
studentList.add(new Student(1,"小明","男",15,85,35));
studentList.add(new Student(2,"小红","女",14,68.5f,80));
studentList.add(new Student(3,"小王","男",16,93,70));
studentList.add(new Student(4,"小陈","女",17,43,65));
studentList.add(new Student(5,"小李","男",16,75.5f,80));
studentList.add(new Student(6,"小刘","男",15,81.5f,90));
studentList.add(new Student(7,"小杨","男",16,72.5f,75));
studentList.add(new Student(8,"小江","男",14,95,100));
studentList.add(new Student(9,"小徐","女",16,80.5f,65));
studentList.add(new Student(10,"小赵","男",16,70.5f,99));

}
}



求补充outputTop5和outputRank 这两个不会写

[我纯洁全身都纯洁]

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class Outputproblem {
    private static ArrayList<Student> studentList = new ArrayList<>();

    public static void main(String[] args) {
        // 1，初始化学生信息
        initstudentinfo();
        // 2,输出所有学生的基本信息；
        outputstudent();
        // 3,输出总分成绩在前五名的学生姓名；
        outputTop5();
        // 4,学生数学成绩按从高到低排序，输出排序结果
        outputRank();

    }

    private static void outputRank() {
        System.out.println("==============数学成绩排序==============");
        Collections.sort(studentList, new Comparator<Student>(){

            @Override
            public int compare(Student o1, Student o2) {
                return (int) (o2.shuXue - o1.shuXue);
            }});
        for (Student student : studentList) {
            System.out.println(student.toString());
        }
    }

    private static void outputTop5() {
        System.out.println("==============总分前五==============");
        Collections.sort(studentList, new Comparator<Student>(){

            @Override
            public int compare(Student o1, Student o2) {
                return (int) ((o2.yuWen + o2.shuXue) - (o1.yuWen + o1.shuXue));
            }});
        for (int i = 0; i < 5; i++) {
            System.out.println(studentList.get(i).toString());
        }

    }

    private static void outputstudent() {
        for (Student student : studentList) {
            System.out.println(student.toString());
        }
        // TODO Auto-generated method stub

    }

    private static void initstudentinfo() {
        studentList.add(new Outputproblem().new Student(1, "小明", "男", 15, 85, 35));
        studentList.add(new Outputproblem().new Student(2, "小红", "女", 14, 68.5f, 80));
        studentList.add(new Outputproblem().new Student(3, "小王", "男", 16, 93, 70));
        studentList.add(new Outputproblem().new Student(4, "小陈", "女", 17, 43, 65));
        studentList.add(new Outputproblem().new Student(5, "小李", "男", 16, 75.5f, 80));
        studentList.add(new Outputproblem().new Student(6, "小刘", "男", 15, 81.5f, 90));
        studentList.add(new Outputproblem().new Student(7, "小杨", "男", 16, 72.5f, 75));
        studentList.add(new Outputproblem().new Student(8, "小江", "男", 14, 95, 100));
        studentList.add(new Outputproblem().new Student(9, "小徐", "女", 16, 80.5f, 65));
        studentList.add(new Outputproblem().new Student(10, "小赵", "男", 16, 70.5f, 99));

    }
    
    class Student{

        int id;
        String name;
        String sex;
        int age;
        float yuWen;
        float shuXue;
        
        public Student(int id, String name, String sex, int age, float yuWen, float shuXue){
            this.id = id;
            this.name = name;
            this.sex = sex;
            this.age = age;
            this.yuWen = yuWen;
            this.shuXue = shuXue;
        }

        @Override
        public String toString() {
            return "Student [id=" + id + ", name=" + name + ", sex=" + sex + ", age=" + age
                    + ", yuWen=" + yuWen + ", shuXue=" + shuXue + "]";
        }
    }
}

结果

Student [id=1, name=小明, sex=男, age=15, yuWen=85.0, shuXue=35.0]
Student [id=2, name=小红, sex=女, age=14, yuWen=68.5, shuXue=80.0]
Student [id=3, name=小王, sex=男, age=16, yuWen=93.0, shuXue=70.0]
Student [id=4, name=小陈, sex=女, age=17, yuWen=43.0, shuXue=65.0]
Student [id=5, name=小李, sex=男, age=16, yuWen=75.5, shuXue=80.0]
Student [id=6, name=小刘, sex=男, age=15, yuWen=81.5, shuXue=90.0]
Student [id=7, name=小杨, sex=男, age=16, yuWen=72.5, shuXue=75.0]
Student [id=8, name=小江, sex=男, age=14, yuWen=95.0, shuXue=100.0]
Student [id=9, name=小徐, sex=女, age=16, yuWen=80.5, shuXue=65.0]
Student [id=10, name=小赵, sex=男, age=16, yuWen=70.5, shuXue=99.0]
==============总分前五==============
Student [id=8, name=小江, sex=男, age=14, yuWen=95.0, shuXue=100.0]
Student [id=6, name=小刘, sex=男, age=15, yuWen=81.5, shuXue=90.0]
Student [id=10, name=小赵, sex=男, age=16, yuWen=70.5, shuXue=99.0]
Student [id=3, name=小王, sex=男, age=16, yuWen=93.0, shuXue=70.0]
Student [id=5, name=小李, sex=男, age=16, yuWen=75.5, shuXue=80.0]
==============数学成绩排序==============
Student [id=8, name=小江, sex=男, age=14, yuWen=95.0, shuXue=100.0]
Student [id=10, name=小赵, sex=男, age=16, yuWen=70.5, shuXue=99.0]
Student [id=6, name=小刘, sex=男, age=15, yuWen=81.5, shuXue=90.0]
Student [id=5, name=小李, sex=男, age=16, yuWen=75.5, shuXue=80.0]
Student [id=2, name=小红, sex=女, age=14, yuWen=68.5, shuXue=80.0]
Student [id=7, name=小杨, sex=男, age=16, yuWen=72.5, shuXue=75.0]
Student [id=3, name=小王, sex=男, age=16, yuWen=93.0, shuXue=70.0]
Student [id=9, name=小徐, sex=女, age=16, yuWen=80.5, shuXue=65.0]
Student [id=4, name=小陈, sex=女, age=17, yuWen=43.0, shuXue=65.0]
Student [id=1, name=小明, sex=男, age=15, yuWen=85.0, shuXue=35.0]