use java Create a program that uses a priority queue to collect user name and us

Question

use java

Create a program that uses a priority queue to collect user name and user age from a system user and then displays those values in ascending order (regardless of the order in which they are added).

import java.util.PriorityQueue;

public class MIKESQCOMPARATORMAIN

{

    public static void main(String[] args)

    {

        MyComparator comparator = new MyComparator();

        PriorityQueue<Employee> pQueue = new PriorityQueue<Employee>(7, comparator);

        pQueue.offer(new Employee("AAA", 15000));

        pQueue.offer(new Employee("BBB", 12000));

        pQueue.offer(new Employee("CCC", 7500));

        pQueue.offer(new Employee("DDD", 17500));

        pQueue.offer(new Employee("EEE", 21500));

        pQueue.offer(new Employee("FFF", 29000));

        pQueue.offer(new Employee("GGG", 14300));

        System.out.println(pQueue.poll());     

        System.out.println(pQueue.poll());      

        System.out.println(pQueue.poll());      

        System.out.println(pQueue.poll());      

        System.out.println(pQueue.poll());      

        System.out.println(pQueue.poll());      

        System.out.println(pQueue.poll());      

    }

}

Explanation / Answer

JAVA :

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */

class Employee{
   public String name;
   public int age;
   Employee(String name, int age){
       this.name = name;
       this.age = age;
   }
   @Override
   public String toString(){
       return name+" "+age;
   }
}
class Ideone
{
   public static void main (String[] args) throws java.lang.Exception
   {
       // your code goes here
       Scanner obj = new Scanner(System.in);
       System.out.println("Enter number of entries");
       int n = obj.nextInt();
       PriorityQueue<Employee> pq = new PriorityQueue<Employee>(n, new Comparator<Employee>(){
           public int compare(Employee a, Employee b){
               //Compare with age
               return Integer.compare(a.age,b.age);
              
               //Compare with the names
               // return a.name.compareTo(b.name);
           }
           });
       for(int i=0;i<n;i++){
           String name = obj.next();
           int age = obj.nextInt();
           pq.add(new Employee(name,age));
       }
       for(int i=0;i<n;i++){
           System.out.println(pq.poll());
       }
      
   }
}

INPUT :

5
Genny 38
Lizz 35
Siva 48
Andrea 27
Prudhvi 21

OUTPUT :

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