Given an array of strings, return all groups of strings that are anagrams.

Note: All inputs will be in lower-case.

解题思路:首先要理解,什么是anagrams,ie。“tea”、“tae”、“aet”,然后就十分好做了,new一个hashmap,使用一个排过序的String作为key,重复了就往里面添加元素,这里出现一个小插曲,就是排序的时候不要用PriorityQueue,因为PriorityQueue是采用堆排序的,仅保证堆顶元素为优先级最高的(害了我好久)JAVA实现如下:

	static public List<String> anagrams(String[] strs) {
List<String> list = new ArrayList<String>();
HashMap<String, List<String>> hm = new HashMap<String, List<String>>();
for (int i = 0; i < strs.length; i++) {
char [] c=strs[i].toCharArray();
Arrays.sort(c);
String sortString=new String(c);
if (!hm.containsKey(sortString))
hm.put(sortString.toString(), new ArrayList<String>());
hm.get(sortString.toString()).add(strs[i]);
}
Iterator<String> iterator = hm.keySet().iterator();
while (iterator.hasNext()) {
String key = iterator.next();
if (hm.get(key).size() > 1)
list.addAll(hm.get(key));
}
return list;
}

Java for LeetCode 049 Anagrams的更多相关文章

  1. LeetCode 049 Anagrams

    题目要求:Anagrams Given an array of strings, return all groups of strings that are anagrams. Note: All i ...

  2. Java for LeetCode 216 Combination Sum III

    Find all possible combinations of k numbers that add up to a number n, given that only numbers from ...

  3. Java for LeetCode 214 Shortest Palindrome

    Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. ...

  4. Java for LeetCode 212 Word Search II

    Given a 2D board and a list of words from the dictionary, find all words in the board. Each word mus ...

  5. Java for LeetCode 211 Add and Search Word - Data structure design

    Design a data structure that supports the following two operations: void addWord(word)bool search(wo ...

  6. Java for LeetCode 210 Course Schedule II

    There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prer ...

  7. Java for LeetCode 200 Number of Islands

    Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surro ...

  8. Java for LeetCode 188 Best Time to Buy and Sell Stock IV【HARD】

    Say you have an array for which the ith element is the price of a given stock on day i. Design an al ...

  9. Java for LeetCode 154 Find Minimum in Rotated Sorted Array II

    Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 migh ...

随机推荐

  1. shell将输入的参数逆序

    #! /usr/bin/ksh count=$#  //总共输入参数 cmd="echo" while [[ $count -gt 0 ]] do cmd="$cmd \ ...

  2. bzoj 3172 后缀数组|AC自动机

    后缀数组或者AC自动机都可以,模板题. /************************************************************** Problem: 3172 Us ...

  3. BZOJ-3229 石子合并 GarsiaWachs算法

    经典DP?稳T 3229: [Sdoi2008]石子合并 Time Limit: 3 Sec Memory Limit: 128 MB Submit: 426 Solved: 202 [Submit] ...

  4. jauery加入项目中,但是在页面中显示没有找到这个文件--springMVC框架

    遇到一件很不爽的事情,自己明明已经把jquery的文件放在了项目中,但是在页面中总是看不到效果,开发者模式提示没有找到文件,当时都要郁闷疯了,后来无意间看到了Eclipse中报的错,怎么与Spring ...

  5. c中动态使用数组

    #include <iostream> #include <fstream> #include<stdlib.h> #define MAXNUM 200 int I ...

  6. SOAP 格式设置选项

    SOAP 格式设置选项 两个格式设置选项为: Style:适用于 SOAP 消息中 Body 元素的子元素(也可能是孙级).此选项指定为 binding WSDL 元素(通常情况下)或 operati ...

  7. Android Studio集成SVN报错:can't use subversion command line client : svn

    Android Studio集成SVN插件,check out出代码后,每次开启都会在右上角出现如下错误: Can't use Subversion command line client: svn ...

  8. JavaScript的apply和call方法及其区别

    参考资料: http://blog.csdn.net/myhahaxiao/article/details/6952321 apply和call能“劫持”其他对象的方法来执行,其形参如下: apply ...

  9. python多线程备份MYSQL数据库并删除旧的备份。

    #!/usr/bin/python # -*- coding=utf-8 -*- import time import os import datetime import threading from ...

  10. BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler错误的解决方法

    出现这个问题是因为我的spring3.0里的包是单独引用的,缺少了别的包 譬如Configuration problem: Unable to locate Spring NamespaceHandl ...