Help fix this code

[Harini Rao]

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());

}
}

[Londbrok]

Do you actually ever add something to the priority queue? You create it with size and a comprator, but theres no trace of actual values being added.

[keang]

Do you actually ever add something to the priority queue?

The code contains a list of adds starting with stringQueue.add("apple");,

[Londbrok]

yeah sure does , how blind of me.

[keang]

yeah sure does , how blind of me.

Don't worry we've all done similar things before now and will probably do them again in the future.

I want my Priority Queue to first give out the words starting with 's' then 'z' and then the rest.

Your compare method needs to do something like:

public int compare(String S1,String S2) {

    if ( S1.startsWith(S) ) {
        if ( S2.startsWith(S) ) {
            return 0;
        }

        return -1;
    }
    
    if (S1.startsWith(Z)) {
        if ( S2.startsWith(S) ) {
            return 1;
        }
        if ( S2.startsWith(Z) ) {
            return 0;
        }

        return -1;
    }

    if (S2.startsWith(S) || S2.startsWith(Z)) {
        return 1;
    }

    return 0;
 }