题解 | #字符串的相邻字符去重#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param s string字符串 
     * @return string字符串
     */
    public String removeDuplicates(String s) {
        // write code here
        Stack<Character> stack = new Stack<>();
        for (int i = 0; i < s.length(); i++) {
            if (!stack.isEmpty() && stack.peek() == s.charAt(i)) {
                stack.pop();
            } else {
                stack.push(s.charAt(i));
            }
        }
        StringBuffer sb = new StringBuffer("");
        while (!stack.isEmpty()) {
            sb.append(stack.pop());
        }
        sb.reverse();
        return new String(sb);
    }
}