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Description:
Write a function that takes a string as input and returns the string reversed.
Example 1:
Input: “hello”
Output: “olleh”
Example 2:
Input: “A man, a plan, a canal: Panama”
Output: “amanaP :lanac a ,nalp a ,nam A”
题意:将给定的字符串反序输出;
解法:使用StringBuilder对象,将字符串中的字符逆序输入到StringBuilder对象中;
Java
class Solution {
public String reverseString(String s) {
StringBuilder sb = new StringBuilder();
for (int i = s.length() - 1; i >= 0 ; i--) {
sb.append(s.charAt(i));
}
return sb.toString();
}
}