java - Sorting an array of objects by more than one field -

say have array holds 10 objects each 3 values supposed represent league table

team1 20 5 team2 21 6 team3 21 8 team4 23 8 

i want sort first value (points) , 2nd value (goal difference).

arrays.sort() work if override compareto() , write piece of custom code.

is there easier way? converting list etc.?

creating comparator correct way solve this. whether use arrays.sort() or collections.sort() you.

i suggest former avoids conversion list , preferable.

i recommend don't solve implementing comparable in object, sounds display issue , embedding sort order in object not wise.

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an example (untested) implementation might be:

public class examplecomparator implements comparator<yourobject> {    public int compare(yourobject o1, yourobject o2) {     if (o1 == null || o2 == null) {       throw new nullpointerexception();     }      if (o1.getvalue1() != o2.getvalue1()) {       return integer.compare(o1.getvalue1(), o2.getvalue1());     }      return integer.compare(o1.getvalue2(), o2.getvalue2());   } }