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Interface DataStructures.PriorityQueue

public interface PriorityQueue
Protocol for priority queues.

Method Index

o deleteMin()
Remove the smallest item from the priority queue.
o findMin()
Find the smallest item in the priority queue.
o insert(Comparable)
Insert into the priority queue.
o isEmpty()
Test if the priority queue is logically empty.
o makeEmpty()
Make the priority queue logically empty.

Methods

o insert 
public abstract void insert(Comparable x)
Insert into the priority queue. Duplicates are allowed.

Parameters:
x - the item to insert.
o findMin 
public abstract Comparable findMin() throws Underflow
Find the smallest item in the priority queue.

Returns:
the smallest item.
Throws: Underflow
if the priority queue is empty.
o deleteMin 
public abstract Comparable deleteMin() throws Underflow
Remove the smallest item from the priority queue.

Throws: Underflow
if the priority queue is empty.
o makeEmpty 
public abstract void makeEmpty()
Make the priority queue logically empty.

o isEmpty 
public abstract boolean isEmpty()
Test if the priority queue is logically empty.

Returns:
true if empty, false otherwise.
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