Question

Implement a Paritylterator for an ArrayList such that when the arraylist has odd number of items, it will only return the 1st, 3rd, 5th, items and if the arraylist has even number of items it will return the 2nd, 4th, 6th... items.

Answer 1

import java.util.ArrayList;

public class ParityIterator {

public static <T> void parity(ArrayList<T> list)

{

int size=list.size();

if(size%2==0)

{

for(int i=0;i<size;i+=2)

System.out.println(list.get(i));

}

else

{

for(int i=1;i<size;i+=2)

System.out.println(list.get(i));

}

}

public static void main(String[] args) {

ArrayList<String> s=new ArrayList<String>();

ArrayList<String> l=new ArrayList<String>();

s.add("A");

s.add("B");

s.add("C");

s.add("D");

s.add("E");

s.add("F");

l.add("A");

l.add("B");

l.add("C");

l.add("D");

l.add("E");

parity(s);

parity(l);

}

}

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