数组排序比较器方法始终进行默认比较 [英] Array Sort Comparator method always does a default comparison

问题描述

我有一个班级学生-int年龄，int身高和姓名；

I have a class student - int age , int height and Name;

我有n个学生班级的对象，我尝试先按年龄排序(如果有平局，然后按身高排序)，如果有平局，则对名称进行随机排序.

I have n objects of the student class and I try to sort then first by age , if there is a tie then by height , if there is a tie randomize name .

我上课

class StudentComparator implements Comparator{

 public int compare(Object 1, Object2)
 {
    // Logic
 }

}

我有一个主要班级

class StudentSorter {

  // Initialise student objects etc
  // Have an array of students: students[]              
    Array.Sort(students,new StudentComparator() )

   // print values

}

我面临的问题是Output与我在StudentComparator类的比较器方法中的逻辑不相似. 逻辑是:

The problem I am facing is that Output does not resemble the logic I have in comparator method of the StudentComparator class. Logic is :

  if(Student1.age > student2.age)
    {
               return 1; 
    }    
    else if(Student1.age < student2.age)
    {
              return -1;
    }
     else 
     {
        if(Student1.height > Student2.height)
                    return 1; 
        else if(Student1.height < Student2.height)
                return -1;
             else 
                return 0;


      }

输入: 15 6约翰 16 5山姆 17 6鲁尼

Input : 15 6 John 16 5 Sam 17 6 Rooney

输出:(无论我如何处理逻辑甚至对其进行评论)

output: (no matter How I play around with logic or even comment it)

17        6       Rooney 
16        5       Sam
15        6       John

可能是什么问题?

推荐答案

您可以尝试以下方法:

public int compare(Student s1, Student s2) 
{
    return s1.age == s2.age ? s1.height - s2.height : s1.age - s2.age;
}

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