ProductQuality.java Source code

Introduction

Here is the source code for ProductQuality.java

Source

import java.util.Comparator;
import java.util.PriorityQueue;

enum ProductQuality {
    High, Medium, Low
}

class Product implements Comparable<Product> {
    String name;

    ProductQuality priority;

    Product(String str, ProductQuality pri) {
        name = str;
        priority = pri;
    }

    public int compareTo(Product msg2) {
        return priority.compareTo(msg2.priority);
    }
}

class MessageComparator implements Comparator<Product> {
    public int compare(Product msg1, Product msg2) {
        return msg2.priority.compareTo(msg1.priority);
    }
}

public class Main {
    public static void main(String args[]) {

        PriorityQueue<Product> pq = new PriorityQueue<Product>(3);

        pq.add(new Product("A", ProductQuality.Low));
        pq.add(new Product("B", ProductQuality.High));
        pq.add(new Product("C", ProductQuality.Medium));
        Product m;
        while ((m = pq.poll()) != null)
            System.out.println(m.name + " Priority: " + m.priority);

        PriorityQueue<Product> pqRev = new PriorityQueue<Product>(3, new MessageComparator());

        pqRev.add(new Product("D", ProductQuality.Low));
        pqRev.add(new Product("E", ProductQuality.High));
        pqRev.add(new Product("F", ProductQuality.Medium));

        while ((m = pqRev.poll()) != null)
            System.out.println(m.name + " Priority: " + m.priority);
    }
}