Custom order of priority queue

Question

I am a novice in Java. I intend to use a priority queue which holds objects. The objects have a string and two integers. I have to order the priority queue based on one of the integer.
I write syntax according to my understanding please correct me.
PriorityQueue<Object> pr = new PriorityQueue<Object>();
comparable(){
sort(Object.int2)// this is the place where I am confused
}

Answer 1

Here's an example:
public class Caller
    public static void main(String[] args)
        Flight f1 = new Flight( "java", 2, 34 );
        Flight f2 = new Flight( "java", 2, 3 );
        Flight f3 = new Flight( "java", 2, 4 );
        Flight f4 = new Flight( "java", 2, 64 );
        Flight f5 = new Flight( "java", 2, 22 );
        Flight f6 = new Flight( "java", 2, 12 );
        PriorityQueue pq = new PriorityQueue();
        pq.add(f1);
        pq.add(f2);
        pq.add(f3);
        pq.add(f4);
        pq.add(f5);
        pq.add(f6);
        System.out.println(pq.poll());
        System.out.println(pq.poll());
        System.out.println(pq.poll());
        System.out.println(pq.poll());
        System.out.println(pq.poll());
        System.out.println(pq.poll());
public class Flight implements Comparable
    private String airlinename;
    private int flightnumber;
    private int number;
    public int compareTo(Object o)
        Flight f = (Flight) o;
        return number - f.getNumber();
    public String toString()
        return airlinename + " - " + number;
    public Flight(String airname, int num1, int num2)
        airlinename = airname;
        flightnumber = num1;
        number = num2;
    public String getAirlinename()
        return airlinename;
    public void setAirlinename(String airlinename)
        this.airlinename = airlinename;
    public int getFlightnumber()
        return flightnumber;
    public void setFlightnumber(int flightnumber)
        this.flightnumber = flightnumber;
    public int getNumber()
        return number;
    public void setNumber(int number)
        this.number = number;
}Got it?