编程：字符串翻转Java

import java.util.*;

public class Reverse {
public String reverseString(String iniString) {

if (iniString == null || iniString.length() <= 0) {
return null;
}

StringBuilder str = new StringBuilder();

for (int i = 0; i < iniString.length(); i++) {
str = str.append(iniString.charAt(iniString.length() - 1 - i));
}
return str.toString();
}
}