java数据结构排序算法之树形选择排序详解

package exp_sort;
public class TreeSelectSort {
 public static int[] TreeSelectionSort(int[] mData) {
  int TreeLong = mData.length * 4;
  int MinValue = -10000;
  int[] tree = new int[TreeLong]; // 树的大小
  int baseSize;
  int i;
  int n = mData.length;
  int max;
  int maxIndex;
  int treeSize;
  baseSize = 1;
  while (baseSize < n) {
   baseSize *= 2;
  }
  treeSize = baseSize * 2 - 1;
  for (i = 0; i < n; i++) {
   tree[treeSize - i] = mData[i];
  }
  for (; i < baseSize; i++) {
   tree[treeSize - i] = MinValue;
  }
  // 构造一棵树
  for (i = treeSize; i > 1; i -= 2) {
   tree[i / 2] = (tree[i] > tree[i - 1] ? tree[i] : tree[i - 1]);
  }
  n -= 1;
  while (n != -1) {
   max = tree[1];
   mData[n--] = max;
   maxIndex = treeSize;
   while (tree[maxIndex] != max) {
    maxIndex--;
   }
   tree[maxIndex] = MinValue;
   while (maxIndex > 1) {
    if (maxIndex % 2 == 0) {
     tree[maxIndex / 2] = (tree[maxIndex] > tree[maxIndex + 1] ? tree[maxIndex]
       : tree[maxIndex + 1]);
    } else {
     tree[maxIndex / 2] = (tree[maxIndex] > tree[maxIndex - 1] ? tree[maxIndex]
       : tree[maxIndex - 1]);
    }
    maxIndex /= 2;
   }
  }
  return mData;
 }
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  int array[] = { 38, 62, 35, 77, 55, 14, 35, 98 };
  TreeSelectionSort(array);
  for (int i = 0; i < array.length; i++) {
   System.out.print(array[i] + " ");
  }
  System.out.println("\n");
 }
}