Java实现字符数组全排列

import org.junit.Test;public class AllSort {public void permutation(char[] buf, int start, int end) {if (start == end) {// 当只要求对数组中一个字母进行全排列时，只要就按该数组输出即可for (int i = 0; i <= end; i++) {System.out.print(buf[i]);}System.out.println();} else {// 多个字母全排列for (int i = start; i <= end; i++) {char temp = buf[start];// 交换数组第一个元素与后续的元素buf[start] = buf[i];buf[i] = temp;permutation(buf, start + 1, end);// 后续元素递归全排列temp = buf[start];// 将交换后的数组还原buf[start] = buf[i];buf[i] = temp;}}}@Testpublic void testPermutation() throws Exception {char[] buf = new char[] { 'a', 'b', 'c' };permutation(buf, 0, 2);}}

运行测试，输出结果：

abc
acb
bac
bca
cba
cab