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# Poll() method

suavedeep kaur
Ranch Hand
Posts: 36
import java.util.*;
class PQ{
static class PQSort implements Comparator<Integer>{
public int compare(Integer one , Integer two){
return two-one;
}

}

public static void main(String [] args){
int[] ia={1,5,3,7,6,9,8};
PriorityQueue<Integer> pq1= new PriorityQueue<Integer>();

for(int x: ia )
pq1.offer(x);
for(int x: ia )
System.out.print(pq1.poll() + " ");
System.out.println(" ");
PQSort pqs =new PQSort();//Comparator orders the elements in opposite of the natural order
PriorityQueue<Integer> pq2= new PriorityQueue<Integer>(10,pqs);

for(int x : ia)
pq2.offer(x);
System.out.println("size " + pq2.size());
System.out.println("peek " + pq2.peek());
System.out.println("size " + pq2.size());
System.out.println("poll " + pq2.poll());
System.out.println("size " + pq2.size());
for(int x : ia)
System.out.print(pq2.poll() + " ");
}

}

I am getting little confused about what the second for loop is doing in this program ??? If anyone can help !!!

Rob Spoor
Sheriff
Posts: 20709
68