Valid Parenthesis String

https://www.lintcode.com/problem/valid-parenthesis-string/description

import java.util.ArrayList;
import java.util.List;

public class Solution {
    /**
     * @param s: the given string
     * @return: whether this string is valid
     */
    public boolean checkValidString(String s) {
        // Write your code here
        List list = new ArrayList<>();
        test:
        for (char c : s.toCharArray()) {
            if (c == '(' || c == '*') {
                list.add(c);
            } else {
                for (int i = list.size() - 1; i >= 0; i--) {
                    if (list.get(i) == '(') {
                        list.remove(i);
                        continue test;
                    }
                }
                for (int i = list.size() - 1; i >= 0; i--) {
                    if (list.get(i) == '*') {
                        list.remove(i);
                        continue test;
                    }
                }
                return false;
            }
        }
        test:
        for (int i = 0; i < list.size(); i++) {
            Character character = list.get(i);
            if (character == '(') {
                for (int j = i + 1; j < list.size(); j++) {
                    Character character1 = list.get(j);
                    if (character1 == '*') {
                        list.remove(j);
                        list.remove(i);
                        i--;
                        continue test;
                    }
                }
                return false;
            }
        }
        return true;
    }
}