VietMX Staff asked 4 years ago
The followings are the steps to reversing a String using Stack:
Stringtochar[].- Create a
Stack. - Push all characters, one by one.
- Then Pop all characters, one by one and put into the
char[]. - Finally, convert to the
String.
Complexity Analysis
Implementation
public static String reverse(String str) {
char[] charArr = str.toCharArray();
int size = charArr.length;
Stack stack = new Stack(size);
int i;
for (i = 0; i < size; ++i) {
stack.push(charArr[i]);
}
for (i = 0; i < size; ++i) {
charArr[i] = stack.pop();
}
return String.valueOf(charArr);
}