一道經常遇到的面試編程題，字符串逆序輸出
public class MyTest {public static void main(String[] args) {
String a = "qwfdvfb";
System.out.print("字符串原本的順序：");
System.out.println(a.toCharArray());
System.out.print("字符串逆序輸出：");
for (int i = 6; i >=0; i--) {
System.out.print(a.charAt(i));
}
}
}