PriorityQueue iterator() Method in Java
Last Updated :
10 Dec, 2018
The Java.util.PriorityQueue.iterator() method is used to return an iterator of the same elements as the Priority Queue. The elements are returned in random order from what present in the Queue.
Syntax:
Iterator iterate_value = Priority_Queue.iterator();
Parameters: The function does not take any parameter.
Return Value: The method iterates over the elements of the queue and returns the values(iterators).
Below programs illustrate the Java.util.PriorityQueue.iterator() method:
Program 1:
import java.util.*;
public class PriorityQueueDemo {
public static void main(String args[])
{
PriorityQueue<String> queue = new PriorityQueue<String>();
queue.add( "Welcome" );
queue.add( "To" );
queue.add( "Geeks" );
queue.add( "4" );
queue.add( "Geeks" );
System.out.println( "PriorityQueue: " + queue);
Iterator value = queue.iterator();
System.out.println( "The iterator values are: " );
while (value.hasNext()) {
System.out.println(value.next());
}
}
}
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Output:
PriorityQueue: [4, Geeks, To, Welcome, Geeks]
The iterator values are:
4
Geeks
To
Welcome
Geeks
Program 2:
import java.util.*;
public class PriorityQueueDemo {
public static void main(String args[])
{
PriorityQueue<Integer> queue = new PriorityQueue<Integer>();
queue.add( 10 );
queue.add( 15 );
queue.add( 30 );
queue.add( 20 );
queue.add( 5 );
System.out.println( "PriorityQueue: " + queue);
Iterator value = queue.iterator();
System.out.println( "The iterator values are: " );
while (value.hasNext()) {
System.out.println(value.next());
}
}
}
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Output:
PriorityQueue: [5, 10, 30, 20, 15]
The iterator values are:
5
10
30
20
15
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