100000数据插入排序
时间: 2023-11-12 14:57:26 浏览: 33
问题:如何实现100000数据的插入排序?
回答:
插入排序是一种简单直观的排序算法,其基本思想是将一个记录插入到已经排好序的有序表中,从而得到一个新的、记录数增加1的有序表。具体实现过程如下:
```java
public static void insertionSort(int[] arr) {
int n = arr.length;
for (int i = 1; i < n; ++i) {
int key = arr[i];
int j = i - 1;
while (j >= 0 && arr[j] > key) {
arr[j + 1] = arr[j];
j = j - 1;
}
arr[j + 1] = key;
}
}
```
对于100000数据的插入排序,可以采用多线程的方式来提高排序效率。具体实现过程如下:
```java
public static void parallelInsertionSort(int[] arr) throws InterruptedException {
int n = arr.length;
int numThreads = Runtime.getRuntime().availableProcessors();
int chunkSize = n / numThreads;
Thread[] threads = new Thread[numThreads];
for (int i = 0; i < numThreads; ++i) {
final int start = i * chunkSize;
final int end = (i == numThreads - 1) ? n : (i + 1) * chunkSize;
threads[i] = new Thread(() -> {
for (int j = start + 1; j < end; ++j) {
int key = arr[j];
int k = j - 1;
while (k >= start && arr[k] > key) {
arr[k + 1] = arr[k];
k = k - 1;
}
arr[k + 1] = key;
}
});
threads[i].start();
}
for (int i = 0; i < numThreads; ++i) {
threads[i].join();
}
for (int i = 1; i < numThreads; ++i) {
int key = arr[i];
int j = i - 1;
while (j >= 0 && arr[j] > key) {
arr[j + 1] = arr[j];
j = j - 1;
}
arr[j + 1] = key;
}
}
```