我正在搜索实现算法的类..我在网上找到了一些代码...
package sun.misc;
public class Sort {
private static void swap(Object arr[], int i, int j) {
Object tmp;
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
/**
* quicksort the array of objects.
*
* @param arr[] - an array of objects
* @param left - the start index - from where to begin sorting
* @param right - the last index.
* @param comp - an object that implemnts the Compare interface to resolve thecomparison.
*/
public static void quicksort(Object arr[], int left, int right, Compare comp) {
int i, last;
if (left >= right) { /* do nothing if array contains fewer than two */
return; /* two elements */
}
swap(arr, left, (left+right) / 2);
last = left;
for (i = left+1; i <= right; i++) {
if (comp.doCompare(arr[i], arr[left]) < 0) {
swap(arr, ++last, i);
}
}
swap(arr, left, last);
quicksort(arr, left, last-1, comp);
quicksort(arr, last+1, right, comp);
}
public static void quicksort(Object arr[], Compare comp) {
quicksort(arr, 0, arr.length-1, comp);
}
}
现在我想知道是否有一些特定的类用于Java中最常见的算法,例如冒泡排序/堆排序/二叉树等……你们有什么想法吗?
最佳答案
您需要研究两件事。
Collections#sort方法
和Comparator界面