import javax.mail.Part;
/**
* 顺序查找、排序
*
* @author 曾修建
* @version 创建时间：2014-7-30 下午04:15:10
*/
public class SequentialSearch {
public static void main(String[] args) {
Integer[] a = {1,2,3,4,5,7,6,88};
//二分查找非递归
System.out.println( "二分查找非递归实现 位置 : "+ Binary_Seach(a,0));
//二分查找递归实现
System.out.println("二分查找递归实现 ：" +Binary(a,0,a.length,1));
//插值查找
System.out.println(" 插值查找位置 ： "+Insert_Search(a,3));
//斐波拉契查找
//稠密索引 （家里放的东西记录到笔记本上）/
//分块索引（图书馆的书）
//倒排索引
Integer[] a_sort = {1,33,3,14,5,71,6,88};
//希尔排序
Shell_Sort(a_sort);
//冒泡排序
Bubble_Sort(a_sort);
//插入排序
Insert_Sort(a_sort);
//简单选择排序
Select_Sort(a_sort);
//快速排序
Quick_Sort(a_sort);
//堆排序
Heap_Sort(a_sort);
//归并排序
Merge_Sort(a_sort);
for (int i = 0; i < a.length; i++) {
if (a[i]==8) {
System.out.println("找到了");
}
}
int i=0;
if (a[0]==1) {
System.out.println("找到了");
//return 0;
}
a[0]=1;
while (a[i]!=1) {
i++;
}
//return i;
}
//堆排序
public static void Heap_Sort(Integer[] array) {
// 对数组进行筛选，建成一个大顶堆
double len = array.length - 1;
for (int i = (int) Math.floor(len/2); i > 0; i--) {
heapAdjust(array, i, array.length - 1);
}
for (int i = array.length - 1; i > 0; i--) {
// 将堆顶元素与最后一个元素调换位置，即输出最大值
// swap(array, 1, i);
int temp;
temp = array[1];
array[1] = array[i];
array[i] = temp;
// 将最后一位剔出，数组最大下标变为i-1。自队顶至叶子进行调整，形成一个新堆，此过程称为筛选
heapAdjust(array, 1, i - 1);
}
System.err.println();
System.err.println("堆排序 ：");
for (int i = 1; i < array.length; i++) {
System.err.print(array[i] + " ");
}
}
// 建堆函数，认为【s，m】中只有 s
// 对应的关键字未满足大顶堆定义，通过调整使【s，m】成为大顶堆=====================================================
public static void heapAdjust(Integer[] array, int s, int m) {
// 用0下标元素作为暂存单元
array[0] = array[s];
// 沿孩子较大的结点向下筛选
for (int j = 2 * s; j <= m; j *= 2) {
// 保证j为较大孩子结点的下标，j < m 保证 j+1 <= m ，不越界
if (j < m && array[j] < array[j + 1]) {
j++;
}
if (!(array[0] < array[j])) {
break;
}
// 若S位较小，应将较大孩子上移
array[s] = array[j];
// 较大孩子的值变成S位的较小值，可能引起顶堆的不平衡，故对其所在的堆进行筛选
s = j;
}
// 若S位较大，则值不变；否则，S位向下移动至2*s、4*s、。。。
array[s] = array[0];
}
// 交换函数=====================================================
public static void swap(Integer[] array, int i, int j) {
int temp;
temp = array[i];
array[i] = array[j];
array[j] = temp;
}
//归并排序
public static void Merge_Sort(Integer []a) {
if (a.length>0) {
M_Sort(a,a,0,a.length-1);
}
System.err.println();
System.err.println("归并排序 ： ");
for (int i = 0; i < a.length; i++) {
System.err.print(a[i]+" ");
}
}
//归并排序实现
public static void M_Sort(Integer []a,Integer []td, int low , int high) {//拆分
int mid ;
Integer [] td2 = new Integer[a.length];
if (low == high) {
td[low] = a[high];
}
else {
mid =(low+high)/2;
M_Sort(a, td2, low, mid);
M_Sort(a, td2, mid+1, high);
Merge(a, td, low, mid, high);
}
}
//归并排序合并
public static void Merge(Integer []a , Integer []td ,int low , int mid, int high) {
int m , n , k;
for ( m = low ,n = mid ,k=low ; m < mid && n < high ; k++) {
td[k] = a[m] < a[n] ? a[m++]:a[n++];
}
if (m < mid) {
for (int i = 0; i < mid-m; i++) {
td[k+i] = a[m+i];
}
}
if (n<high) {
for (int i = 0; i < high-n; i++) {
td[k+i] = a[n+i];
}
}
System.err.println();
System.err.println("归并排序 ： ");
for (int i = 0; i < td.length; i++) {
System.err.print(td[i]+" ");
}
}
//快速排序
public static void Quick_Sort(Integer a[]) {
if (a.length>0) {
Sort(a,0,a.length-1);
}
System.err.println();
System.err.println("快速排序 ： ");
for (int i = 0; i < a.length; i++) {
System.err.print(a[i]+" ");
}
}
//快排实现
public static void Sort(Integer []a, int low, int high) {
if (low<high) {
int position = Part(a , low , high);
Sort(a, low, position-1);
Sort(a, position+1, high);
}
}
//快排方法
public static int Part(Integer []a,int low , int high){
int i = low , j = high ,po = a[low];
while (i<j) {
while (i<j && po < a[j]) {
j--;
}
a[i] = a[j];//比中轴小的记录移到低端
while (i<j && po >a[i]) {
i++;
}
a[j] = a[i];//比中轴大的记录移到高端
}
// a[low] =po; //中轴记录到尾
return i;
}
//简单选择排序
public static void Select_Sort(Integer []a) {
for (int i = 0; i < a.length; i++) {
int min =i;
for (int j = i+1; j < a.length; j++) {
if (a[min] > a[j]) {
min = j;
}
}
if (min!=i) {
int temp = a[min];
a[min] = a[i];
a[i] = temp;
}
}
System.err.println();
System.err.println("简单选择 ： ");
for (int i = 0; i < a.length; i++) {
System.err.print(a[i]+" ");
}
}
//插入排序
public static void Insert_Sort(Integer []a) {
for (int i = 1; i < a.length; i++) {
if (a[i]<a[i-1]) {
for (int j = i; j >=0; j--) {
if (a[i]<a[j]) {
int temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
}
System.err.println();
System.err.println("插入 ： ");
for (int i = 0; i < a.length; i++) {
System.err.print(a[i]+" ");
}
}
//希尔排序
public static void Shell_Sort(Integer []a) {
int step =a.length;
do {
step = step/3+1;
for (int i = step+1; i < a.length; i++) {
if (a[i]<a[i-step]) {
int temp = a[i];
a[i] = a[i-step];
a[i-step] =temp;
}
}
} while (step>1);
System.err.println();
System.err.println("希尔 ： ");
for (int i = 0; i < a.length; i++) {
System.err.print(a[i]+" ");
}
}
//冒泡排序
public static void Bubble_Sort(Integer []a ) {
for (int i = 1; i < a.length; i++) {
for (int j = a.length-1; j >=i; j--) {
if (a[j]<a[j-1]) {
int temp = a[j];
a[j] = a[j-1];
a[j-1] = temp;
}
}
}
System.err.println();
System.err.println("冒泡 ： ");
for (int i = 0; i < a.length; i++) {
System.err.print(a[i]+" ");
}
}
//插值查找
public static int Insert_Search(Integer []a , int k) {
int low = 0 , high = a.length-1 , mid=-1;
while (low<=high) {
mid = low+((k-a[low])/(a[high]-a[low]))*(high-low);
if (a[mid] == k) {
return mid;
}
else if (a[mid] > k) {
high = mid-1;
}
else {
low = mid+1;
}
}
return -1;
}
//递归实现二分查找
public static int Binary(Integer []a , int low , int high ,int k) {
int mid = (low+high)/2;
if (a[mid] == k) {
return mid;
}
else if (a[mid] > k) {
return Binary(a, low , mid-1, k);
}
else {
return Binary(a, mid + 1, high, k);
}
}
//非递归实现二分查找
public static int Binary_Seach(Integer[] a , int k){
int low = 0 , high = a.length , mid=-1;
while (low<=high) {
mid = (low+high)/2;
if (a[mid]==k) {
return mid;
}
else if (a[mid]>k) {
high = mid-1;
}
else {
low = mid+1;
}
}
return -1;
}
}
原文地址：http://blog.csdn.net/wintersweetzeng/article/details/38323655
