Java的快速排序怎么写
时间: 2023-03-08 14:52:18 浏览: 43
Java中快速排序的代码如下:
public static void quickSort(int[] arr, int startIndex, int endIndex) {
int pivotIndex;
if (startIndex < endIndex) {
pivotIndex = partition(arr, startIndex, endIndex);
quickSort(arr, startIndex, pivotIndex-1);
quickSort(arr, pivotIndex+1, endIndex);
}
}
private static int partition(int[] arr, int startIndex, int endIndex) {
int pivot = arr[endIndex];
int i = startIndex - 1;
for (int j = startIndex; j < endIndex; j++) {
if (arr[j] <= pivot) {
i++;
int temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
int temp = arr[i+1];
arr[i+1] = arr[endIndex];
arr[endIndex] = temp;
return i+1;
}
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