sorting - Java, sort arraylist by custom alpha order -

let's have

arraylist<string> fruits 

that contains

{"banana", "apple", "grape", "banana", "banana", "grape"} 

i know how sort these alphabetically using comparator (below) :

collections.sort(fruits, new comparator<fruit>() {         public int compare(fruit o1, fruit o2) {             return o1.getname().compareto(o2.getname());         }     }); 

however give me {"apple", "banana", "banana", "banana", "grape", "grape"}. how change bananas listed first, apples, grapes? thanks!

this might started:

list<string> fruitsorder = arrays.aslist(new string[]{"banana","apple","grape"}); comparator<string> c = comparator.comparingint(str -> fruitsorder.indexof(str)); 

you refine further, normalizing case, and/or using comparator.thencomparing, have consistent order fruits not in list.