Class ByteHeaps

java.lang.Object
it.unimi.dsi.fastutil.bytes.ByteHeaps

public final class ByteHeaps
extends Object
A class providing static methods and objects that do useful things with heaps.

The static methods of this class allow to treat arrays as 0-based heaps. They are used in the implementation of heap-based queues, but they may be also used directly.

  • Method Details

    • downHeap

      public static int downHeap​(byte[] heap, int size, int i, ByteComparator c)
      Moves the given element down into the heap until it reaches the lowest possible position.
      Parameters:
      heap - the heap (starting at 0).
      size - the number of elements in the heap.
      i - the index of the element that must be moved down.
      c - a type-specific comparator, or null for the natural order.
      Returns:
      the new position of the element of index i.
    • upHeap

      public static int upHeap​(byte[] heap, int size, int i, ByteComparator c)
      Moves the given element up in the heap until it reaches the highest possible position.
      Parameters:
      heap - the heap (starting at 0).
      size - the number of elements in the heap.
      i - the index of the element that must be moved up.
      c - a type-specific comparator, or null for the natural order.
      Returns:
      the new position of the element of index i.
    • makeHeap

      public static void makeHeap​(byte[] heap, int size, ByteComparator c)
      Makes an array into a heap.
      Parameters:
      heap - the heap (starting at 0).
      size - the number of elements in the heap.
      c - a type-specific comparator, or null for the natural order.