Java PriorityQueue spliterator() Method

The spliterator() method of the PriorityQueue class creates a late-binding and fail-fast Spliterator that does not traverse the elements in any particular order in this queue.

Syntax

Parameter

Specified By

The spliterator() method of the PriorityQueue class is specified by:

spliterator in interface Collection<E>.
spliterator in interface Iterable<E>.

Return Value

The spliterator () method returns a Spliterator over the elements in the queue.

Example 1

import java.util.PriorityQueue;
import java.util.Spliterator;

public class PriorityQueueSpliteratorExample1 {
static int i=1;
public static void main(String[] args) {
PriorityQueue<String>Pqueue = new PriorityQueue<String>();
//add add elements to the hash set
Pqueue.add("Avijit");
Pqueue.add("Bani");
Pqueue.add("Chehak");
//spliterator  split and iterate the split parts in parallel
Spliterator<String>str = Pqueue.spliterator();
// if element exists tryAdvance() will perform action
while(str.tryAdvance((n)->System.out.println(i++ +" Name - "+n)));
    }
}

Output:

1 Name - Avijit
2 Name - Bani
3 Name - Chehak

Example 2

import java.util.PriorityQueue;
import java.util.Spliterator;

public class PriorityQueueSpliteratorExample2 {
static int i =0;
public static void main(String[] args) {
PriorityQueue<String>Pqueue = new PriorityQueue<String>();
// add elements to the Priority queue
Pqueue.add("aman");
Pqueue.add("bhavika");
Pqueue.add("chavi");
Pqueue.add("chandan");
//spliterator  split and iterate the split parts in parallel
Spliterator<String>str = Pqueue.spliterator();
// perform action for each remaining element
str.forEachRemaining(
                (n)-> {
                    String lc = n.toUpperCase();
System.out.println(++i +" Lower case = "+n);
System.out.println(i +" Upper case = "+lc);
System.out.println();
                }
        );
    }
}

Output:

1 Lower case = aman
1 Upper case = AMAN

2 Lower case = bhavika
2 Upper case = BHAVIKA

3 Lower case = chavi
3 Upper case = CHAVI

4 Lower case = chandan
4 Upper case = CHANDAN

Example 3

import java.util.PriorityQueue;
import java.util.Spliterator;

class Information implements Comparable<Information>{
    Integer marks;
    String rollNo, name;
static int i=1;

public Information(String rollNo, String name, int marks) {
this.rollNo= rollNo;
this.name = name;
this.marks= marks;
    }
public String toString(){
return i++ +" Roll No = "+rollNo+"\n Name = "+name +"\n Marks = "+marks+"\n";
    }

@Override
public int compareTo(Information obj) {
return marks.compareTo(obj.marks);
    }
}

public class PriorityQueueSpliteratorExample3 {

public static void main(String[] args) {
PriorityQueue<Information>Pqueue = new PriorityQueue<Information>();
        Information val1 = new Information("15cs1029","Reema panda",21);
        Information val2 = new Information("15cs1012","Geetanjali Sharma",26);
        Information val3 = new Information("15cs1011","Himanshu Bhardwaj",27);
Pqueue.add(val1);
Pqueue.add(val2);
Pqueue.add(val3);
Spliterator<Information>str = Pqueue.spliterator();
while(str.tryAdvance((n)->System.out.println(n)));
    }
}

Output:

1 Roll No = 15cs1029
 Name = Reema panda
 Marks = 21

2 Roll No = 15cs1012
 Name = Geetanjali Sharma
 Marks = 26

3 Roll No = 15cs1011
 Name = HimanshuBhardwaj
 Marks = 27

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