Whats the output???

[himanshu kesarwani]

class flub
{
public static void main(string arg[])
{
List<String> x=new ArrayList<String>();
x.add("x"); x.add("xx"); x.add("Xx");

//insert code here

for(String s: x) system.out.println(s);
}
}


output:
xx
Xx
x


ANSWER IS:
Comparator c=Collection.reverseOrder();
Collection.sort(x,c);




GUYS i am getting just nothing that :
1. why comparator, and where is its overridden method and class .
2.what is reverseOrder(); its first time i am lookin at this .

please guys,kindly clarify how this output is coming?? and how all this Comparator is working here !!

[Christophe Verré]

2.what is reverseOrder(); its first time i am lookin at this

That's a typo in the answer. Look for Collections#reverseOrder in the API.

[Harshit Rastogi]

The

Collections.reverseOrder()    

returns a comparator which will use to reverse the data in reverseorder. So in the sort function the comparator object is passed to decide the manner
in which data need to be sorted.

[sudipto shekhar]

Please use code tags while posting code on the forum

[himanshu kesarwani]

kindly,explain clearly!!

[Harshit Rastogi]

The

  Collections.sort  

takes comparator as parameter. So each element is compared with the other using the overriden method for the interface and the collection is sorted in
that manner. Please check the implementation of reverseOrder method in jdk source.