Leetcode71简化路径

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Leetcode71简化路径

代码：

class Solution {public String simplifyPath(String path) {String[] names = path.split("/");Deque<String> stack = new ArrayDeque<String>();for(String name: names){if(name.equals("..")){if(!stack.isEmpty()){stack.pollLast();}}else if(name.length()>0&&!".".equals(name)){stack.offerLast(name);}}StringBuffer ans = new StringBuffer();if(stack.isEmpty()){ans.append('/');}else{while(!stack.isEmpty()){ans.append('/');ans.append(stack.pollFirst());}}return ans.toString();}
}

stack的一些用法