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316.37. //fixdown 38. private void fixDown(int k) {
317.39. int j;
318.40. while ((j = k << 1) <= size) {
319.41. if (j < size && queue[j]<queue[j+1])
320.42. j++;
321.43. if (queue[k]>queue[j]) //不用交换 44. break;
322.45. SortUtil.swap(queue,j,k);
323.46. k = j;
324.47. }
325.48. }
326.49. private void fixUp(int k) {
327.50. while (k > 1) {
328.51. int j = k >> 1;
329.52. if (queue[j]>queue[k])
330.53. break;
331.54. SortUtil.swap(queue,j,k);
332.55. k = j;
333.56. }
334.57. }
335.58. }
336.59.}
337.60.SortUtil:
338.1.package org.rut.util.algorithm;
339.2.import org.rut.util.algorithm.support.BubbleSort;
340.3.import org.rut.util.algorithm.support.HeapSort;
341.4.import org.rut.util.algorithm.support.ImprovedMergeSort;
342.5.import org.rut.util.algorithm.support.ImprovedQuickSort;
343.6.import org.rut.util.algorithm.support.InsertSort;
344.7.import org.rut.util.algorithm.support.MergeSort;
345.8.import org.rut.util.algorithm.support.QuickSort;
346.9.import org.rut.util.algorithm.support.SelectionSort;
347.10.import org.rut.util.algorithm.support.ShellSort;
348.11.12.public class SortUtil {
349.13. public final static int INSERT = 1;
350.14. public final static int BUBBLE = 2;
351.15. public final static int SELECTION = 3;
352.16. public final static int SHELL = 4;
353.17. public final static int QUICK = 5;
354.18. public final static int IMPROVED_QUICK = 6;
355.19. public final static int MERGE = 7;
356.20. public final static int IMPROVED_MERGE = 8;
357.21. public final static int HEAP = 9;
358.22. public static void sort(int[] data) {
359.23. sort(data, IMPROVED_QUICK);
360.24. }
361.25. private static String[] name={
362.26. “insert”,“bubble”,“selection”,“shell”,“quick”,“improved_quick”,“merge”,“improved_merge”,“heap”
363.27. };
364.28.
365.29. private static Sort[] impl=new Sort[]{
366.30. new InsertSort(),
367.31. new BubbleSort(),
368.32. new SelectionSort(),
369.33. new ShellSort(),
370.34. new QuickSort(),
371.35. new ImprovedQuickSort(),
372.36. new MergeSort(),
373.37. new ImprovedMergeSort(),
374.38. new HeapSort()
375.39. };
376.40. public static String toString(int algorithm){
377.41. return name[algorithm-1];
378.42. }
379.43.
380.44. public static void sort(int[] data, int algorithm) {
381.45. impl[algorithm-1].sort(data);
382.46. }
383.47. public static interface Sort {
384.48. public void sort(int[] data);
385.49. }
386.50. public static void swap(int[] data, int i, int j) {
387.51. int temp = data[i];
388.52. data[i] = data[j];
389.53. data[j] = temp;
390.54. }
391.55.}
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