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Poll() method

 
suavedeep kaur
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Posts: 36
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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
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Please Use Code Tags.

And you might want to check out java.util.PriorityQueue
 
suavedeep kaur
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thanks Rob
 
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