标签:
用到的Class和methods:
1. 类String
String s;
s.charAt(i);
2. 类Character: http://docs.oracle.com/javase/7/docs/api/java/lang/Character.html
isLetterOrDigit(char ch)
toLowerCase(char ch)
append(char c)
char
argument to this sequence.标签:
原文地址:http://www.cnblogs.com/hygeia/p/4793476.html