leetcode Letter Combinations of a Phone Number(Java)
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题目链接：点击打开链接
类型：字符串处理
解法：建立词典库，将新来的每个数字字符对应的多个字符加到每个结果字符串中
public class Solution { public List<String> letterCombinations(String digits) {List<String> s = new LinkedList<>();String[] map = {"","","abc","def","ghi","jkl","mno","pqrs","tuv","wxyz"};if (digits == null || digits.length() < 1)return s;s.add("");for (int i = 0 ; i < digits.length() ; i++){String curr = map[digits.charAt(i)-'0'];List<String> temp = new LinkedList<>();for (int j = 0 ; j < s.size() ; j++){for (char iter : curr.toCharArray()){temp.add(s.get(j) + iter);}}s = temp;}return s; }}阅读全文
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