反转字符串

public class StringReverse {
    public static void main(String[] args) {
        String str = "00nuhsnehc";
        System.out.println(reverse(str));
    }
    public static String reverse(String str) {
        if (str == null || str.trim().length() == 0) {
            return "";
        }
        final String c = str.substring(0, 1);
        final String substring = str.substring(1);
        //递归取出前一个
        String temp = reverse(substring);
        return temp + c;
    }
}