package comturdemo;
public class Hello {
public static void main(String[] args) {
Systemoutprintln(reverseWords(How are you!));
Systemoutprintln(reverseWords(do justice to a dinner));
Systemoutprintln(reverseWords());
Systemoutprintln(reverseWords(A));
Systemoutprintln(reverseWords(A Biao));
Systemoutprintln(reverseWords(!A Biao C));
}
public static String reverseWords(String str) {
int start = ;
int end = ;
char[] chs = strtoCharArray();
// 先逆转整个字符串
reverseCharactersInRange(chs chslength );
// 再逆转逆转后的字符数组中组成单词的字符
for (int i = ; i < chslength; ++i) {
if (CharacterisLetter(chs[i])) {
// 找到组成单词的字符的起始和结束位置
if (start > end) {
start = end = i;
} else {
++end;
}
} else {
if (start < end) {
reverseCharactersInRange(chs start end);
}
start = chslength;
}
}
if (start < end) {
reverseCharactersInRange(chs start end);
}
return new String(chs);
}
public static void reverseCharactersInRange(char[] chs int start int end) {
int times = (end start + ) / ;
for (int i = ; i < times; ++i) {
char temp = chs[start + i];
chs[start + i] = chs[end i];
chs[end i] = temp;
}
}
}
