java - Sorting the values in the treemap -

i read text file , stored in tree map each key having multiple values.like,

key: a1bg values: g5730 a4527 e3732 b0166

key: bca3 values: c1478 a4172 d8974 b1432 e2147

key: db8c values: n0124 k7414 x9851

since tree map got keys sorted.now,i want sort values corresponding key.and o/p as,

key: a1bg values: a4527 b0166 e3732 g5730

key: bca3 values: a4172 b1432 c1478 d8974 e2147

key: db8c values: k7414 n0124 x9851

iam new java.can on this. here code

bufferedreader reader =  new bufferedreader(new filereader("e:\\book\\datasone.txt")); map<string, string> map = new treemap<string,string>(); string currentline; while ((currentline = reader.readline()) != null)  {   string[] pair  = currentline.split("\\s+");   key = pair[0];   value = pair[1];   if(map.containskey(key))   {     value +=  map.get(key);   }   else   {     map.put(key,value);       } } (string name: map.keyset()) {   string key =name.tostring();   string value = map.get(name).tostring();     system.out.println(key + " " + value+ " ");   }    

if there no duplicate values store values treeset

public class testmap {      public static void main(string[] args) {          list<string> lines = new arraylist();         lines.add("a1bg g5730");         lines.add("a1bg a4527");         lines.add("a1bg e3732");         lines.add("a1bg b0166");         lines.add("bca3 c1478");         lines.add("bca3 a4172");         lines.add("bca3 d8974");         lines.add("bca3 b1432");         lines.add("bca3 e2147");         lines.add("db8c n0124");         lines.add("db8c k7414");         lines.add("db8c x9851");          map<string, set<string>> map = new treemap<string,set<string>>();         for(string currentline : lines){             string[] pair  = currentline.split("\\s+");             string key = pair[0];             string value = pair[1];             if(!map.containskey(key)){                 set<string> set = new treeset<string>();                 map.put(key,set);             }             map.get(key).add(value);         }         (string name: map.keyset())         {             string key =name.tostring();             system.out.print(key);             (string value : map.get(name)){                 system.out.print(" " + value);             }             system.out.println();         }     } } 

output

a1bg a4527 b0166 e3732 g5730 bca3 a4172 b1432 c1478 d8974 e2147 db8c k7414 n0124 x9851