Java各种排序算法汇总(冒泡,选择,归并,希尔及堆排序等)

本文实例汇总了java各种排序算法。分享给大家供大家参考，具体如下：

1. 冒泡排序：

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1,3,12,23,110,45645,321,456,78,-1,78,78,32,444,345}; 
  show(a); 
  bubblesort(a); 
  show(a); 
 } 
 private static void bubblesort(int[] a) { 
  for(int i=0;i<a.length-1;i++){ 
   for(int j=0;j<a.length-i-1;j++){ 
    if(a[j]>a[j+1]){ 
     int tmp = a[j]; 
     a[j] = a[j+1]; 
     a[j+1] = tmp; 
    } 
   } 
  } 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
}

2. 快速排序(无重复值)：

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,3,12,23,110}; 
  show(a); 
  quicksort(a,0,a.length-1); 
  show(a); 
 } 
 private static void quicksort(int[] a, int start, int end) { 
  if (start>=end) 
   return; 
  int i=start; 
  int j=end; 
  int index = start; 
  while(i<j){ 
   while(a[j]>a[index]){ 
    j--; 
   } 
   index = swap(a,j,index); 
   while(a[index]>a[i]){ 
    i++; 
   } 
   index = swap(a,i,index); 
  } 
  quicksort(a, start, index-1); 
  quicksort(a, index+1, end); 
 } 
 private static int swap(int[] a, int n, int index) { 
  int tmp = a[n]; 
  a[n] = a[index]; 
  a[index] = tmp; 
  return n; 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

3. 快速排序（可含重复值）

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1,3,12,23,110,45645,321,456,78,-1,78,78,32,345}; 
  show(a); 
  quicksort2(a,0,a.length-1); 
  show(a); 
 } 
 private static void quicksort2(int[] a, int start, int end) { 
  if (start>=end) 
   return; 
  int i=start; 
  int j=end; 
  int index = end; 
  while(i<j){ 
   while(a[j]>a[index]){ 
    j--; 
   } 
   if (j!=index && a[j]==a[index]){ 
    index = swap(a,--j,index); 
   }else{ 
    index = swap(a,j,index); 
   } 
   while(a[index]>a[i]){ 
    i++; 
   } 
   if (i!=index && a[i]==a[index]){ 
    index = swap(a,++i,index); 
   }else{ 
    index = swap(a,i,index); 
   } 
  } 
  quicksort2(a, start, index-1); 
  quicksort2(a, index+1, end); 
 } 
 private static int swap(int[] a, int n, int index) { 
  int tmp = a[n]; 
  a[n] = a[index]; 
  a[index] = tmp; 
  return n; 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

4. 堆排序

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1,3,12,23,110,45645,321,456,78,-1,78,78,32,444,345}; 
  show(a); 
  heapsort(a); 
  show(a); 
 } 
 private static void heapsort(int[] a) { 
  //建立最大堆 
  int size = a.length; 
  for(int i=size/2-1;i>=0;i--){ 
   createbigheap(a,i,size-1); 
  } 
  //排序 
  for(int j=0;j<size-1;j++){ 
   int tmp=a[0]; 
   a[0]=a[size-1-j]; 
   a[size-1-j]=tmp; 
   createbigheap(a,0,size-2-j); 
  } 
 } 
 private static void createbigheap(int[] a, int start, int end) { 
  int tmp = a[start]; 
  int j = 2*start+1; 
  while(j<=end){ 
   if (j<end && a[j]<a[j+1]){ 
    j++; 
   } 
   if (a[j]>tmp){ 
    a[start] = a[j]; 
    start = j; 
    j = 2*j+1; 
   }else{ 
    break; 
   } 
  } 
  a[start] = tmp; 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

5. 插入排序

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1,3}; 
  show(a); 
  insertsort(a); 
  show(a); 
 } 
 private static void insertsort(int[] a) { 
  for(int i=0;i<a.length-1;i++){ 
   int n = i+1; 
   int tmp = a[n]; 
   for(int j=i;j>=0;j--){ 
    if(tmp<a[j]){ 
     a[n] = a[j]; 
     n=j; 
    } 
   } 
   if (a[n]!=tmp) 
    a[n] = tmp; 
  } 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

6. 折半插入排序

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,7,345,2,2,7,2,7,23,2,345,7,32,5,4,-1,3,7,2,3,2,3,4,2,1,2,4,5,3,345,3,2}; 
  show(a); 
  insertsort2(a); 
  show(a); 
 } 
 private static void insertsort2(int[] a) { 
   for(int i=0;i<a.length-1;i++){  
    int n = i+1; 
    int tmp = a[n];  
    if (tmp>a[i]) 
     continue; 
    int low = 0; 
    int high = i; 
    int mid = (high+low)/2; 
    while(high>=low){ 
     mid = (high+low)/2; 
     if(tmp<a[mid]){  
      high = mid -1; 
     }else if(tmp>a[mid]){ 
      low = mid + 1; 
     } else{ 
      low=mid; 
      break; 
     } 
    } 
    for(int j=n;j>mid;j--){ 
     a[j] = a[j-1]; 
    } 
    a[low] = tmp; 
   }  
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

7. 希尔排序

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1,3,2,3,5,7,8,90,1}; 
  show(a); 
  shellsort(a); 
  show(a); 
 } 
 private static void shellsort(int[] a) { 
  shellsort(a,a.length); 
 } 
 private static void shellsort (int[] a, int n){ 
   int i, j, k, temp, gap; 
   int[] gaps = { 1,5,13,43,113,297,815,1989,4711,11969,27901,84801, 
      213331,543749,1355339,3501671,8810089,21521774, 
      58548857,157840433,410151271,1131376761,2147483647 }; 
   for (k=0; gaps[k]<n; k++); 
   while (--k >= 0){ 
    gap = gaps[k]; 
    for (i=gap; i<n; i++){ 
     temp = a[i]; 
     j = i; 
     while (j>=gap && a[j-gap]>temp){ 
      a[j] = a[j-gap]; 
      j = j-gap; 
     } 
     a[j] = temp; 
    } 
   } 
  } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

8. 选择排序

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1}; 
  show(a); 
  selectsort(a); 
  show(a); 
 } 
 private static void selectsort(int[] a) { 
  for (int i = 0; i < a.length-1; i++) { 
   int min = i; 
   for (int j = i+1; j < a.length; j++) { 
    if (a[j]<a[min]) 
     min = j; 
   } 
   if (min!=i){ 
    int tmp = a[i]; 
    a[i] = a[min]; 
    a[min] = tmp; 
   } 
  } 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

9. 归并排序

public class sorttest { 
 public static void main(string[] args) { 
  int[] a = {345,7,32,5,4,-1,3,2,3,5,7,8,90,1,432,1}; 
  show(a); 
  mergesort(a); 
  show(a); 
 } 
 private static void mergesort(int[] a) { 
  //找出中间值 
  int mid = a.length/2; 
  //申请空间存储中间索引以左的值 
  int[] left = setvalue(a,0,mid); 
  if (left.length>1){//继续拆分左边，直到元素值为1个 
   mergesort(left); 
  } 
  //申请空间存储中间索引以右的值 
  int[] right = setvalue(a,mid,a.length); 
  if (right.length>1){//继续拆分右边，直到元素值为1个 
   mergesort(right); 
  } 
  //将左右值合并 
  merge(a,left,right); 
 } 
 private static void merge(int[] a , int[] left, int[] right) { 
  int i=0,j=0,k=0; 
  for(;i<left.length && j<right.length;){ 
   if (left[i]<right[j]){ 
    a[k++] = left[i++]; 
   }else{ 
    a[k++] = right[j++]; 
   } 
  } 
  for(;i<left.length;i++){ 
   a[k++] = left[i]; 
  } 
  for(;j<right.length;j++){ 
   a[k++] = right[j]; 
  } 
 } 
 private static int[] setvalue(int[] a, int start,int length) { 
  int[] x = new int[length-start]; 
  for (int i = 0; i < x.length; i++) { 
   x[i] = a[start++]; 
  } 
  return x; 
 } 
 private static void show(int[] a) { 
  system.out.println(arrays.tostring(a)); 
 } 
} 

汇总：

public class sortutil { 
 public final static int desc = -1; 
 public final static int asc = 1; 
 /** 
  * 冒泡排序 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void bubblesort(int[] a,int sort) { 
  if (sort==asc) 
   bubblesortasc(a); 
  else 
   bubblesortdesc(a); 
 } 
 public static void bubblesortasc(int[] a) { 
  for(int i=0;i<a.length-1;i++){ 
   for(int j=0;j<a.length-i-1;j++){ 
    if(a[j]>a[j+1]){ 
     int tmp = a[j]; 
     a[j] = a[j+1]; 
     a[j+1] = tmp; 
    } 
   } 
  } 
 } 
 public static void bubblesortdesc(int[] a) { 
  for(int i=0;i<a.length-1;i++){ 
   for(int j=0;j<a.length-i-1;j++){ 
    if(a[j]<a[j+1]){ 
     int tmp = a[j]; 
     a[j] = a[j+1]; 
     a[j+1] = tmp; 
    } 
   } 
  } 
 } 
// ----------------华-丽-的-功-能-分割-线----------------------- 
 /** 
  * 快速排序（不允许有重复值） 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void quicknorepeatsort(int[] a,int sort) { 
  if (sort==asc) 
   quicknorepeatsortasc(a, 0, a.length-1); 
  else 
   quicknorepeatsortdesc(a, 0, a.length-1); 
 } 
 private static void quicknorepeatsortasc(int[] a, int start, int end) { 
  if (start >= end) 
   return; 
  int i = start; 
  int j = end; 
  int index = start; 
  while (i < j) { 
   while (a[j] > a[index]) { 
    j--; 
   } 
   index = swap(a, j, index); 
   while (a[index] > a[i]) { 
    i++; 
   } 
   index = swap(a, i, index); 
  } 
  quicknorepeatsortasc(a, start, index - 1); 
  quicknorepeatsortasc(a, index + 1, end); 
 } 
 private static void quicknorepeatsortdesc(int[] a, int start, int end) { 
  if (start >= end) 
   return; 
  int i = start; 
  int j = end; 
  int index = start; 
  while (i < j) { 
   while (a[j] < a[index]) { 
    j--; 
   } 
   index = swap(a, j, index); 
   while (a[index] < a[i]) { 
    i++; 
   } 
   index = swap(a, i, index); 
  } 
  quicknorepeatsortdesc(a, start, index - 1); 
  quicknorepeatsortdesc(a, index + 1, end); 
 } 
 /** 
  * 快速排序（允许有重复值） 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void quicksort(int[] a,int sort) { 
  if (sort==asc) 
   quicksortasc(a, 0, a.length-1); 
  else 
   quicksortdesc(a, 0, a.length-1); 
 } 
 private static void quicksortasc(int[] a, int start, int end) { 
  if (start >= end) 
   return; 
  int i = start; 
  int j = end; 
  int index = end; 
  while (i < j) { 
   while (a[j] > a[index]) { 
    j--; 
   } 
   if (j != index && a[j] == a[index]) { 
    index = swap(a, --j, index); 
   } else { 
    index = swap(a, j, index); 
   } 
   while (a[index] > a[i]) { 
    i++; 
   } 
   if (i != index && a[i] == a[index]) { 
    index = swap(a, ++i, index); 
   } else { 
    index = swap(a, i, index); 
   } 
  } 
  quicksortasc(a, start, index - 1); 
  quicksortasc(a, index + 1, end); 
 } 
 private static void quicksortdesc(int[] a, int start, int end) { 
  if (start >= end) 
   return; 
  int i = start; 
  int j = end; 
  int index = end; 
  while (i < j) { 
   while (a[j] < a[index]) { 
    j--; 
   } 
   if (j != index && a[j] == a[index]) { 
    index = swap(a, --j, index); 
   } else { 
    index = swap(a, j, index); 
   } 
   while (a[index] < a[i]) { 
    i++; 
   } 
   if (i != index && a[i] == a[index]) { 
    index = swap(a, ++i, index); 
   } else { 
    index = swap(a, i, index); 
   } 
  } 
  quicksortdesc(a, start, index - 1); 
  quicksortdesc(a, index + 1, end); 
 } 
 private static int swap(int[] a, int n, int index) { 
  int tmp = a[n]; 
  a[n] = a[index]; 
  a[index] = tmp; 
  return n; 
 } 
// ----------------华-丽-的-功-能-分割-线------------------
 /** 
  * 堆排序 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void heapsort(int[] a,int sort){ 
  if (sort==asc) 
   heapsortasc(a); 
  else 
   heapsortdesc(a); 
 } 
 public static void heapsortasc(int[] a) { 
  // 建立最大堆 
  int size = a.length; 
  for (int i = size / 2 - 1; i >= 0; i--) { 
   createbigheap(a, i, size - 1); 
  } 
  // 排序 
  for (int j = 0; j < size - 1; j++) { 
   int tmp = a[0]; 
   a[0] = a[size - 1 - j]; 
   a[size - 1 - j] = tmp; 
   createbigheap(a, 0, size - 2 - j); 
  } 
 } 
 private static void createbigheap(int[] a, int start, int end) { 
  int tmp = a[start]; 
  int j = 2 * start + 1; 
  while (j <= end) { 
   if (j < end && a[j] < a[j + 1]) { 
    j++; 
   } 
   if (a[j] > tmp) { 
    a[start] = a[j]; 
    start = j; 
    j = 2 * j + 1; 
   } else { 
    break; 
   } 
  } 
  a[start] = tmp; 
 } 
 public static void heapsortdesc(int[] a) { 
  // 建立最小堆 
  int size = a.length; 
  for (int i = size / 2 - 1; i >= 0; i--) { 
   createsmallheap(a, i, size - 1); 
  } 
  // 排序 
  for (int j = 0; j < size - 1; j++) { 
   int tmp = a[0]; 
   a[0] = a[size - 1 - j]; 
   a[size - 1 - j] = tmp; 
   createsmallheap(a, 0, size - 2 - j); 
  } 
 } 
 private static void createsmallheap(int[] a, int start, int end) { 
  int tmp = a[start]; 
  int j = 2 * start + 1; 
  while (j <= end) { 
   if (j < end && a[j] > a[j + 1]) { 
    j++; 
   } 
   if (a[j] < tmp) { 
    a[start] = a[j]; 
    start = j; 
    j = 2 * j + 1; 
   } else { 
    break; 
   } 
  } 
  a[start] = tmp; 
 } 
// ----------------华-丽-的-功-能-分割-线--------------------- 
 /** 
  * 插入排序 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void insertsort(int[] a,int sort){ 
  if (sort==asc){ 
   insertsortasc(a); 
  }else{ 
   insertsortdesc(a); 
  } 
 } 
 public static void insertsortasc(int[] a) { 
  for (int i = 0; i < a.length - 1; i++) { 
   int n = i + 1; 
   int tmp = a[n]; 
   for (int j = i; j >= 0; j--) { 
    if (tmp < a[j]) { 
     a[n] = a[j]; 
     n = j; 
    } 
   } 
   if (a[n] != tmp) 
    a[n] = tmp; 
  } 
 } 
 public static void insertsortdesc(int[] a) { 
  for (int i = 0; i < a.length - 1; i++) { 
   int n = i + 1; 
   int tmp = a[n]; 
   for (int j = i; j >= 0; j--) { 
    if (tmp > a[j]) { 
     a[n] = a[j]; 
     n = j; 
    } 
   } 
   if (a[n] != tmp) 
    a[n] = tmp; 
  } 
 } 
// ----------------华-丽-的-功-能-分割-线--------------------
 /** 
  * 折半插入排序 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void halfinsertsort(int[] a,int sort){ 
  if (sort==asc){ 
   halfinsertsortasc(a); 
  }else{ 
   halfinsertsortdesc(a); 
  } 
 } 
 public static void halfinsertsortasc(int[] a) { 
  for (int i = 0; i < a.length - 1; i++) { 
   int n = i + 1; 
   int tmp = a[n]; 
   if (tmp > a[i]) 
    continue; 
   int low = 0; 
   int high = i; 
   int mid = (high + low) / 2; 
   while (high >= low) { 
    mid = (high + low) / 2; 
    if (tmp < a[mid]) { 
     high = mid - 1; 
    } else if (tmp > a[mid]) { 
     low = mid + 1; 
    } else { 
     low = mid; 
     break; 
    } 
   } 
   for (int j = n; j > mid; j--) { 
    a[j] = a[j - 1]; 
   } 
   a[low] = tmp; 
  } 
 } 
 public static void halfinsertsortdesc(int[] a) { 
  for (int i = 0; i < a.length - 1; i++) { 
   int n = i + 1; 
   int tmp = a[n]; 
   if (tmp < a[i]) 
    continue; 
   int low = 0; 
   int high = i; 
   int mid = (high + low) / 2; 
   while (high >= low) { 
    mid = (high + low) / 2; 
    if (tmp > a[mid]) { 
     high = mid - 1; 
    } else if (tmp < a[mid]) { 
     low = mid + 1; 
    } else { 
     low = mid; 
     break; 
    } 
   } 
   for (int j = n; j > mid; j--) { 
    a[j] = a[j - 1]; 
   } 
   a[low] = tmp; 
  } 
 } 
// ----------------华-丽-的-功-能-分割-线----------------------
 /** 
  * 希尔排序 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void shellsort(int[] a,int sort){ 
  if (sort==asc){ 
   shellsortasc(a,a.length); 
  }else{ 
   shellsortdesc(a,a.length); 
  } 
 } 
 public static void shellsortasc(int[] a, int n) { 
  int i, j, k, temp, gap; 
  int[] gaps = { 1, 5, 13, 43, 113, 297, 815, 1989, 4711, 11969, 27901, 
    84801, 213331, 543749, 1355339, 3501671, 8810089, 21521774, 
    58548857, 157840433, 410151271, 1131376761, 2147483647 }; 
  for (k = 0; gaps[k] < n; k++) 
   ; 
  while (--k >= 0) { 
   gap = gaps[k]; 
   for (i = gap; i < n; i++) { 
    temp = a[i]; 
    j = i; 
    while (j >= gap && a[j - gap] > temp) { 
     a[j] = a[j - gap]; 
     j = j - gap; 
    } 
    a[j] = temp; 
   } 
  } 
 } 
 public static void shellsortdesc(int[] a, int n) { 
  int i, j, k, temp, gap; 
  int[] gaps = { 1, 5, 13, 43, 113, 297, 815, 1989, 4711, 11969, 27901, 
    84801, 213331, 543749, 1355339, 3501671, 8810089, 21521774, 
    58548857, 157840433, 410151271, 1131376761, 2147483647 }; 
  for (k = 0; gaps[k] < n; k++) 
   ; 
  while (--k >= 0) { 
   gap = gaps[k]; 
   for (i = gap; i < n; i++) { 
    temp = a[i]; 
    j = i; 
    while (j >= gap && a[j - gap] < temp) { 
     a[j] = a[j - gap]; 
     j = j - gap; 
    } 
    a[j] = temp; 
   } 
  } 
 } 
// ----------------华-丽-的-功-能-分割-线---------------------
 /** 
  * 选择排序 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void selectsort(int[] a,int sort){ 
  if (sort==asc){ 
   selectsortasc(a); 
  }else{ 
   selectsortdesc(a); 
  } 
 } 
 public static void selectsortasc(int[] a) { 
  for (int i = 0; i < a.length - 1; i++) { 
   int min = i; 
   for (int j = i + 1; j < a.length; j++) { 
    if (a[j] < a[min]) 
     min = j; 
   } 
   if (min != i) { 
    int tmp = a[i]; 
    a[i] = a[min]; 
    a[min] = tmp; 
   } 
  } 
 } 
 public static void selectsortdesc(int[] a) { 
  for (int i = 0; i < a.length - 1; i++) { 
   int max = i; 
   for (int j = i + 1; j < a.length; j++) { 
    if (a[j] > a[max]) 
     max = j; 
   } 
   if (max != i) { 
    int tmp = a[i]; 
    a[i] = a[max]; 
    a[max] = tmp; 
   } 
  } 
 } 
// ----------------华-丽-的-功-能-分割-线---------------------
 /** 
  * 归并排序 
  * 
  * @param a sort array 
  * @param sort sortutil.asc,sortutil.desc 
  */ 
 public static void mergesort(int[] a,int sort){ 
  // 找出中间值 
  int mid = a.length / 2; 
  // 申请空间存储中间索引以左的值 
  int[] left = setvalue(a, 0, mid); 
  if (left.length > 1) {// 继续拆分左边，直到元素值为1个 
   mergesort(left,sort); 
  } 
  // 申请空间存储中间索引以右的值 
  int[] right = setvalue(a, mid, a.length); 
  if (right.length > 1) {// 继续拆分右边，直到元素值为1个 
   mergesort(right,sort); 
  } 
  if (sort==asc){ 
   mergeasc(a, left, right); 
  }else{ 
   mergedesc(a, left, right); 
  } 
 } 
 private static void mergeasc(int[] a, int[] left, int[] right) { 
  int i = 0, j = 0, k = 0; 
  for (; i < left.length && j < right.length;) { 
   if (left[i] < right[j]) { 
    a[k++] = left[i++]; 
   } else { 
    a[k++] = right[j++]; 
   } 
  } 
  for (; i < left.length; i++) { 
   a[k++] = left[i]; 
  } 
  for (; j < right.length; j++) { 
   a[k++] = right[j]; 
  } 
 } 
 private static void mergedesc(int[] a, int[] left, int[] right) { 
  int i = 0, j = 0, k = 0; 
  for (; i < left.length && j < right.length;) { 
   if (left[i] > right[j]) { 
    a[k++] = left[i++]; 
   } else { 
    a[k++] = right[j++]; 
   } 
  } 
  for (; i < left.length; i++) { 
   a[k++] = left[i]; 
  } 
  for (; j < right.length; j++) { 
   a[k++] = right[j]; 
  } 
 } 
 private static int[] setvalue(int[] a, int start, int length) { 
  int[] x = new int[length - start]; 
  for (int i = 0; i < x.length; i++) { 
   x[i] = a[start++]; 
  } 
  return x; 
 } 
} 

希望本文所述对大家java程序设计有所帮助。