de.weaut.sortDemo

Class BubbleSort

java.lang.Object

de.weaut.sortDemo.SortApp.SortAlgorithm

de.weaut.sortDemo.BubbleSort

Direct Known Subclasses:

QubbleSort

public class BubbleSort
extends SortApp.SortAlgorithm

Bubble sort algorithm demonstration.

SortAlgorithm.java, Thu Oct 27 10:32:35 1994 Author: James Gosling; his version: 1.6, 31 Jan 1995
Modified 23 Jun 1995 by Jason Harrison@cs.ubc.ca: Algorithm completes early when no items have been swapped in the last pass.
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
BubbleSort()

Method Summary

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

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

BubbleSort

public BubbleSort()

Method Detail

bSort

protected final void bSort(int[] a,
                           int lo,
                           int hi)

The 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

lo - the lower index

hi - 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.

Specified by:

sort in class SortApp.SortAlgorithm

main

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

Start as application.

See Also:

SortApp.SortAlgorithm.startMe()