PriorityQueue method in Java

```
import java.util.*;
  
class Main {
    public static void main(String args[]) {
        Queue<Integer> pQueue = new PriorityQueue<Integer>();
  
        pQueue.add(10);
        pQueue.add(20);

        System.out.println(pQueue.peek());
        System.out.println(pQueue.poll());
    }
}
```