Leetcode Simplify Path
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题目链接:https://leetcode.com/problems/simplify-path/
题目:
Given an absolute path for a file (Unix-style), simplify it.
For example,
path = "/home/"
, => "/home"
path = "/a/./b/../../c/"
, => "/c"
思路:
easy
算法:
public String simplifyPath(String path) {
String s[] = path.trim().split("\\\\/+");
Stack<String> stack = new Stack<String>();
for (String str : s) {
if (!str.equals("") && !str.equals(" ") && !str.equals(".") && !str.equals("..")) {
stack.push(str);
} else if (str.equals("..") && stack.size() != 0) {
stack.pop();
}
}
String res = "";// 将栈中剩余元素组合成路径
for (int i = 0; i < stack.size(); i++) {
res = "/" + stack.get(stack.size() - 1 - i) + res;
}
if (res.equals("")) // 防止/../情况
res = "/";
return res;
}
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