de.weaut.sortDemo

Class QubbleSort

java.lang.Object

de.weaut.sortDemo.SortApp.SortAlgorithm

de.weaut.sortDemo.BubbleSort

de.weaut.sortDemo.QubbleSort

public final class QubbleSort
extends BubbleSort

Quick sort with bubble sort speedup algorithm demonstration.

Author Jim Boritz, his version 1.6, 26 Jun 1995

19 Feb 1996: Fixed to avoid infinite loop discovered by Paul Haeberli. Misbehaviour expressed when the pivot element was not unique.

Modif. 15.11.2005, Albrecht Weinert (a-weinert.de) :
SortApp.SortAlgorithm + minor improvements.

Version:

V.16, 16.03.2019

Author:

Albrecht Weinert

Field Summary

Fields inherited from class de.weaut.sortDemo.SortApp.SortAlgorithm

stopRequested

Constructor Summary

Constructors

Constructor and Description
QubbleSort()

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] args) Start as application.
void	sort(int[] a) The real sorting method.
protected void	sort(int[] a, int lo0, int hi0) The quick sort with bubble sort algorithm.

Methods inherited from class de.weaut.sortDemo.BubbleSort

bSort

Methods inherited from class de.weaut.sortDemo.SortApp.SortAlgorithm

getMaxPossiVal, pause, pause, pause, startMe, stop, swap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QubbleSort

public QubbleSort()

Method Detail

sort

protected void sort(int[] a,
                    int lo0,
                    int hi0)

The quick sort with bubble sort algorithm.

This methods sorts the part from index lo0 to index hi0 of the array a.
It must hold: 0 <= lo0 <= hi0 < a.length.

Parameters:

a - the array to be sorted

lo0 - the lower index

hi0 - the upper index

sort

public void sort(int[] a)

Description copied from class: SortApp.SortAlgorithm

The real sorting method.

This method has to sort the array provided as parameter. Every substantial algorithmic step has to be marked by calling one of the callback methods SortApp.SortAlgorithm.pause(int, int), SortApp.SortAlgorithm.pause(int), SortApp.SortAlgorithm.pause() directly or indirectly by utilising SortApp.SortAlgorithm.swap(int, int) for element exchanges within the array having been provided to this sort implementation.
This pausing does all else like counting steps, displaying the sorting state and else.

As substantial step to be treated this way we see

• Assignments respectively swaps within the array to be sorted
  and (only in a first loop through the array) also
• a reading / comparing access to to one or two elements.

Overrides:

sort in class BubbleSort

main

public static void main(java.lang.String[] args)

Start as application.

See Also:

SortApp.SortAlgorithm.startMe()