java sort method?

blackedge

Please help with the help, thank you!

dyzealot

How do you want to sort and spread? say clearly

pzc061

Arrays.sort (...);
Just look at the api, there are many kinds

blackedge

I found the scores of the indefinite number of people from the 15 tables in the database (the number is variable), first add the scores belonging to each person (it is int), and then sort the scores of everyone Enough to use the sort () of the arrays, I searched for useful collections. I have never used it. I do n’t know which one to use. If the selection is not good, the loop may die. Understand!

dyzealot

collections works great

petwolf007

After determining the number of people, how much ARRAY do you think create,

Why can't it be used? ? ? ? ?

bevande

Compare method for overloaded elements

zxg121

You can use Collections.sort (list, new Comparator () {
  public int compare (Object o1, Object o2) {
    MyPerson p1 = (MyPerson) o1;
    MyPerson p2 = (MyPerson) o2;
    return p1.getScore ()-p2.getScore ();
  }
});

blackedge

Thezxg121(meter) method is very practical. I will try it first, but I do n’t know how the comparison rules are set. I want to sort them in descending order by score.

blackedge

Comparator is the rule, how to use it? Thanks