Algorithms—17.Letter Combinations of a Phone Number
来源:互联网 发布:windows磁盘访问权限 编辑:程序博客网 时间:2024/06/01 07:35
public class Solution { public List<String> letterCombinations(String digits) {//存放答案的list List<String> list=new ArrayList<String>(); //建立map存放手机按键 Map<String, List<String>> map=new HashMap<String, List<String>>(); List<String> list2=new ArrayList<String>(); list2.add("a"); list2.add("b"); list2.add("c"); List<String> list3=new ArrayList<String>(); list3.add("d"); list3.add("e"); list3.add("f"); List<String> list4=new ArrayList<String>(); list4.add("g"); list4.add("h"); list4.add("i"); List<String> list5=new ArrayList<String>(); list5.add("j"); list5.add("k"); list5.add("l"); List<String> list6=new ArrayList<String>(); list6.add("m"); list6.add("n"); list6.add("o"); List<String> list7=new ArrayList<String>(); list7.add("p"); list7.add("q"); list7.add("r"); list7.add("s"); List<String> list8=new ArrayList<String>(); list8.add("t"); list8.add("u"); list8.add("v"); List<String> list9=new ArrayList<String>(); list9.add("w"); list9.add("x"); list9.add("y"); list9.add("z"); map.put("2", list2); map.put("3", list3); map.put("4", list4); map.put("5", list5); map.put("6", list6); map.put("7", list7); map.put("8", list8); map.put("9", list9); //循环判断 for (int i = 0; i < digits.length(); i++) {String s=digits.substring(i,i+1);//如果能查到数字键盘if (map.get(s)!=null) {//如果list不为空,即并非刚开始if (list.size()!=0) {//记住目前list的长度int size=list.size();//循环list当前长度for (int j = 0; j < size; j++) {//将list中的每个值与接下来的对应数字键盘的可能性进行拼接for (int k = 0; k <map.get(s).size(); k++) {String a=list.get(j)+map.get(s).get(k);list.add(a);}}//删掉之前的listfor (int j = size-1; j >=0; j--) {list.remove(j);}}else {for (int j = 0; j < map.get(s).size(); j++) {String a=map.get(s).get(j);list.add(a);}}}} return list; }}
0 0
- Algorithms—17.Letter Combinations of a Phone Number
- LeetCode-algorithms 17. Letter Combinations of a Phone Number
- 17.Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 17. Letter Combinations of a Phone Number
- 行车记录仪里面的移动侦测(运动检测、Motion Detection )什么
- ZXing解析二维码
- genymotion-unable to load virtualbox engine
- 微信公众号开发第1篇---注册微信公众帐号
- php调试
- Algorithms—17.Letter Combinations of a Phone Number
- jdom 对xml的操作
- oracle删除主键
- googel 图片搜索原理
- 又见拦截导弹
- iphone-用代码创建界面(Creating Views from Code)
- 【我们都爱Paul Hegarty】斯坦福IOS8公开课个人笔记31 Multithreading多线程
- 认识自己——野心和目标
- P225 5