根据分数JAVA比较学生 [英] Comparing students according to score JAVA
问题描述
我有一班学生。该类具有字符串名称， int studentId 和 int studentScore 。我想比较 ArrayList< Student>中的学生。学生根据学生的说法。这意味着如果学生1和学生2具有相同数量的学生核心，那么他们的两个等级将是相同的。我有一个功能，我设置排名。但我不确定如何比较arraylist中的所有内容。
I have a class of Student. The class has String name, int studentId and int studentScore. I want to compare the students in ArrayList<Student> students according to the studentscore. This means if "student 1" and "student 2" has the same amount of studentscore then both of their ranks will be the same. I have a function where I set The rank. But I'm unsure how to compare everything in the arraylist.
当我搜索比较int值时，我得到结果：
When I search for comparing int values I get the results:
我认为最好的解决方案是使用比较器类功能。但我不确定如何做到这一点因为我不确定比较器类的能力。我想到了循环获得一个玩家的循环，然后再循环和比较。但这似乎不是一个好的解决方案。
I think the best solution will be to use comparator class function. But Im unsure how to do this because I'm unsure of the comparator classes capability. I was think of for looping getting a player by that loop then for looping again and comparing. But this doesnt seem like a good solution.
我想要这个结果：
I want this result:
假设学生数组包含（姓名，学生核心）：
Say that the array of students contains (name,studentscore) is:
(kim, 12), (werder, 20), (ben, 32), (sara, 12)
I想要学生的等级（如果ASC订单）：
I want the rank of the student to be (If ASC order):
kim: rank = 1
werder: 2
ben: 3
sara: 1
推荐答案
您应该使用java Stream（Java 8）。
更好的方法来做到这一点。
您可以找到一个非常好的例子： http://www.leveluplunch.com/java/tutorials/007-sort-arraylist-stream-of-objects-in-java8/
You should use java Stream (Java 8). Better way to do this. You can found a really good exemple at : http://www.leveluplunch.com/java/tutorials/007-sort-arraylist-stream-of-objects-in-java8/
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