public class QuickHeapManager {
  static private final int NULL = -1; // our null link
  static private final int QLSIZE = 10; // quickGet size
  public int[] memory; // the memory we manage
  private int freeStart; // head of general free list
  private int[] quickGet; // heads of quick lists

  /**
   * QuickHeapManager constructor.
   * @param initialMemory the int[] of memory to manage
   */
  public QuickHeapManager(int[] initialMemory) {
    memory = initialMemory;
    memory[0] = memory.length; // one big free block
    memory[1] = NULL; // free list ends with it
    freeStart = 0; // free list starts with it
    quickGet = new int[QLSIZE]; // quick list heads
    int i = 0; // all quick lists are initially empty
    while (i < QLSIZE) quickGet[i++] = NULL;
  }