bubblesorter.java

著名的uncle Bob的Agile software development的代码

public class BubbleSorter
{
  private int operations = 0;
  private int length = 0;
  private SortHandle itsSortHandle = null;

  public BubbleSorter(SortHandle handle)
  {
    itsSortHandle = handle;
  }

  public int sort(Object array)
  {
    itsSortHandle.setArray(array);
    length = itsSortHandle.length();
    operations = 0;
    if (length <= 1)
      return operations;

    for (int nextToLast = length-2; nextToLast >= 0; nextToLast--)
      for (int index = 0; index <= nextToLast; index++)
      {
        if (itsSortHandle.outOfOrder(index))
          itsSortHandle.swap(index);
        operations++;
      }

    return operations;
  }
}