Queue Problems
Queue is the part of Java Collection, it is an Interface based on Queue Data Structure. It follows the Principle of FIFO that is First In First Out.
28. How to Iterate over a Queue in Java?
Below is the Solution of the question:
// Java Program demonstrating
// Queue Iteration
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Queue;
// Driver Class
public class Gfg {
// Main function
public static void main(String[] args) {
// Iterating Queue
Queue<Integer> studentQueue = new LinkedList<>();
// Inserting element in Queue
studentQueue.add(1);
studentQueue.add(3);
studentQueue.add(8);
studentQueue.add(14);
studentQueue.add(9);
studentQueue.add(3);
// Initialising Iterator
Iterator<Integer> studentQueueIterator = studentQueue.iterator();
// Iterating Queue
while (studentQueueIterator.hasNext()) {
Integer name = studentQueueIterator.next();
System.out.print(name+" ");
}
}
}
Output
1 3 8 14 9 3
29. How to Add Elements in Queue Collection in Java?
30. How to Implement a Circular Queue in Java?
31. How to Convert a List to a Queue in Java?
Input: List = { A, B, C} Output: Queue = { A, B, C }
Java Collection Exercise
The Java Collection framework is a fundamental part of the Java programming language, It covers a major part of Java and acts as a prerequisite for many Advanced Java Topics. However, programmers often find it difficult to find a platform to Practice Java Online.
Take a look at our Java Collection Exercise that contains Java Collection Practice Problems to practice and to develop your Java Programming skills. Our Java Collection Practice Exercise will cover all the topics from Basic to Advanced, from ArrayList to Priority Queue. So, let’s dive in and sharpen our Java Collection skills together!
Table of Content
- Basic Program
- ArrayList Problems
- LinkedList Problems
- HashMap Problems
- HashSet Problems
- Stack Problems
- Queue Problems
- Priority Queue Problems