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| class Solution {
public String replaceSpace(String s) {
int spaceCount = 0;
for (int i = 0; i < s.length(); i++) {
if (s.charAt(i) == ' ') {
spaceCount++;
}
}
char[] chars = new char[s.length() + spaceCount * 2];
int i = s.length() - 1, j = chars.length - 1;
while (i >= 0) {
char c = s.charAt(i);
if (c == ' ') {
chars[j--] = '0';
chars[j--] = '2';
chars[j--] = '%';
} else {
chars[j--] = c;
}
i--;
}
return new String(chars);
}
}
|