when I try to it is being executed but unable to get my desired output

Desired Output:
when i call my "remove()" method
I want my Priority Queue to first give out the words starting with 's' then 'z' and then the rest.

import java.util.*;

public class PriorityCustom {


public static void main(String[] args) throws Exception {

//String[] words = {"apple", "crowd", "snow", "place", "snap", "zoo", "zing", "smile", "motto", "simple", "elegant","zebra"};

PriorityQueue<String> stringQueue = new PriorityQueue<String>(20,new Comparator<String>() {

String Z = "z";
String S = "s";
//@Override

public int compare(String S1,String S2) {

if (S1.startsWith(S)) {
return -1;
}
else if (S1.startsWith(Z)) {
return 0;
}
else {
return +1;
}
}
});

stringQueue.add("apple");
stringQueue.add("simple");
stringQueue.add("zoo");
stringQueue.add("zing");
stringQueue.add("elegant");
stringQueue.add("snap");
stringQueue.add("smile");
stringQueue.add("motto");
stringQueue.add("zebra");
stringQueue.add("crowd");
stringQueue.add("snow");
stringQueue.add("place");


/*for (int i = 0; i <0; i++)
stringQueue.add(new String());*/

while(!stringQueue.isEmpty())
System.out.println(stringQueue.remove());

}
}