题目2 快乐消消乐
给定一个字符串将相邻的两个字符进行消除,最后返回消除后字符串的总长数
public int xxl(String content) {
int length = 0;
if (content == null || content.length() == 0) {
return length;
}
char[] chars = content.toCharArray();
Stack<String> sta = new Stack<String>();
for (int i = 0; i < chars.length; i++) {
char c= chars[i];
if (!sta.isEmpty()&&sta.peek().equals(String.valueOf(c))){
sta.pop();
}else {
sta.push(String.valueOf(c));
}
}
return sta.size();
}