[color=red][/color][color=darkred][/color][size=medium][/size]转载
最近在研究Java数据结构和算法

练习写了一个用插入排序的算法

查找部分使用二分查找实现的

和大家分享一下 呵呵

还请各位大牛多指教啊

呵呵

Java代码
import java.util.Random;

public class InsertSort {
/**
* 插入排序算法实现
* @author Jason
* @param arr
* @return
*/
public static int[] insertSort(int[] arr) {
int searchCount = 0;
for (int out = 1; out < arr.length; out++) {
outPrint(arr);
if (arr[out]>arr[out-1]) {
continue;
}
//普通查找算法
/*for (int inn = 0; inn < out; inn++) {
searchCount++;
if (arr[out]<arr[inn]) {
move(arr,out,inn);
break;
}else {
continue;
}
}*/
//使用二分查找算法找到要插入的位置
int start = 0;
int end = out - 1;
while (start <= end) {
searchCount++;
int searchIndex = (start + end) / 2;
if (arr[out] > arr[searchIndex]) {
start = searchIndex + 1;
} else if (arr[out] < arr[searchIndex]) {
if (searchIndex == 0
|| (searchIndex != 0 && arr[out] > arr[searchIndex - 1])) {
move(arr, out, searchIndex);
break;
} else {
end = searchIndex - 1;
continue;
}
} else {
move(arr, out, searchIndex);
break;
}
}
}
check(arr);
System.out.println("Search Count:" + searchCount);
return arr;
}
/**
* 移动数据
*/
private static void move(int[] arr, int out, int inn) {
int changeTemp = arr[out];
for (int i = out; i > inn; i--) {
arr[i] = arr[i - 1];
}
arr[inn] = changeTemp;
}
/**
* 输出
*/
private static void outPrint(int[] arr) {
System.out.println();
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + "|");
}
}
/**
* 结果检查
*/
private static boolean check(int[] arr) {
System.out.println();
for (int i = 1; i < arr.length; i++) {
if (arr[i] < arr[i - 1]) {
System.out.println("Sort Error!");
return false;
}
}
System.out.println("Sort Success!");
return true;
}
/**
* 测试方法
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Random ran = new Random();
int[] arr = new int[60];
for (int i = 0; i < arr.length; i++) {
arr[i]=ran.nextInt(300000);
}
System.out.println("Befor sort:");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i]+"|");
}
arr = InsertSort.insertSort(arr);
System.out.println("After sort:");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i]+"|");
}

}
}