从低到高显示标记

Question

我正在尝试从用户输入中从最低到最高显示标记。代码获取学生姓名数组和标记数组。然后它必须显示从最低到最高分数的输出以及学生姓名。我很震惊在显示学生姓名时。代码仅显示从最低到最高的分数。int n = 5;//total no of studentsScanner in = new Scanner(System.in);System.out.println("Enter Students name:");String[] s = new String[n];for (int i = 0; i<s.length; i++){  s[i] = in.nextLine();}System.out.println("Enter marks:");int array[] = new int[n]; for (int i = 0; i<n; i++) { array[i] = in.nextInt();}Arrays.sort(array);for (int i = 0; i < array.length; i++) {  System.out.println(array[i]);}

Answer 1

创建一个包装类（比如Student）来存储学生姓名和分数。然后使用比较器对它们进行排序以比较标记。

import java.util.Arrays;

import java.util.Comparator;

import java.util.Scanner;

public class testing {

    public static void main(String[] args) {

        int n = 5;//total no of students

        Scanner in = new Scanner(System.in);

        System.out.println("Enter Students name:");

        Student[] students = new Student[n];

        for (int i = 0; i<n; i++)

        {

            students[i] = new Student();

            students[i].name = in.nextLine();

        }

        System.out.println("Enter marks:");

        for (int i = 0; i<n; i++)

        {

            students[i].mark = in.nextInt();

        }

        Arrays.sort(students, new MarkComparator());

        for (int i = 0; i < n; i++)

        {

            System.out.println(students[i].name + " - "+ students[i].mark);

        }

    }

}

class Student {

    int mark;

    String name;

}

class MarkComparator implements Comparator {

    public int compare(Object o1,Object o2){

        Student s1=(Student)o1;

        Student s2=(Student)o2;

        if(s1.mark>=s2.mark) {

            return 1;

        } else {

            return -1;

        }

    }

}

示例输出：

Enter Students name:

alex

bertha

chris

dan

ervin

Enter marks:

50

40

30

20

10

ervin - 10

dan - 20

chris - 30

bertha - 40

alex - 50

Answer 2

这应该适合你

// Class student

public class Student implements Comparable {

    public String Name;

    public double Mark;

    // Should implement comparable to be able to compare it via Marks

    @Override

    public int compareTo(Student per) {

        if(this.Mark == per.Mark)

            return 0;

        else

            return this.Mark > per.Mark ? 1 : -1;

    }

}

//total no of students

int n = 5;

// list of students and their marks

Student[] s = new Student[n];

// Scanner

Scanner in = new Scanner(System.in);

// Get student names and their marks

for (int i = 0; i<s.length; i++)

{

    s[i] = new Student();

    System.out.println("Enter Student #" + i + " name :");

    s[i].Name = in.nextLine();

    System.out.println("Enter Student #" + i + " mark :");

    s[i].mark = in.nextDouble();

}

Arrays.sort(s);

for (int i = 0; i < s.length; i++) 

{

    System.out.println(s[i].Name + " : " + s[i].Mark);

}