我坚持制作单词的规范形式(单词的规范形式包含与原始单词相同的字母,但按排序顺序。例如,“计算机”的规范形式是“cemoprtu”(考虑它们的字母顺序), “程序”的那个是“agmoprr”。)
我使用 mergeSort 对单词的字母进行排序,使用以下代码。然而,它只是给了我原始词而不是规范形式。谁能告诉我我的代码有什么问题?
public static String canonicalForm(String word) {
char[] string = new char[word.length()];
for (int i = 0; i < word.length(); i ++) {
string[i] = word.charAt(i);
}
mergeSort(string);
String result = "";
for (char ch: string) {
result += ch;
}
System.out.println(result);
}
public static void mergeSort(char[] string) {
if (string.length > 1) {
char[] left = Arrays.copyOfRange(string, 0, string.length/2);
char[] right = Arrays.copyOfRange(string, string.length/2, string.length);
mergeSort(left);
mergeSort(right);
merge(string, left, right);
}
}
public static void merge(char[] string, char[] left, char[] right) {
int i1 = 0;
int i2 = 0;
for (int i = 0; i < string.length; i ++) {
if (i1 < left.length) {
if (left[i1] - right[i2] <= 0) {
string[i] = left[i1];
i1 ++;
}
} else if (i2 >= right.length) {
string[i] = left[i1];
i1 ++;
} else {
string[i] = right[i2];
i2 ++;
}
}
}
}