java - Traversing through a map with nested lists as values -

here map, string key (textfile) , value (list of integers):

aaa.txt : {(the=[11], put=[8], i'm=[1], by=[5], you,=[3, 7], the=[4, 10], key=[6, 9]} bbb.txt : {do.=[12], to=[6], i'm=[1], what=[9], you=[4, 10], want=[11], sure=[2]} ccc.txt : {just=[10], need=[7], you,=[6], it=[5], than=[3], it's=[1], the=[11]} 

i want print out in format:

you, 3:7, , 6 

as can see, want print above format "you," located in aaa.txt , ccc.txt not bbb.txt should printed out word you, 3:7, ,6.

if you not found in bbb.txt, isn't, should have you, 3:7, "space", 6. space show word not present in second text file.

just want print every word in map's value , keep. here map structure of what's above

hashmap<string, hashmap<string, list<integer>>> coolmap = new hashmap<string,hashmap<string, list<integer>>>();    expected/wanted output   20, 4:20 ,15   ,  , 16:17   , 16 , 

you try iterating through each map keys. using hashset eliminates duplicates.

hashset<string> keys = new hashset<>();         (entry<string, hashmap<string, list<integer>>> entry : coolmap.entryset()) {             (entry<string, list<integer>> innerentry : entry.getvalue().entryset()) {                 string innerkey = innerentry.getkey();                 keys.add(innerkey);             } 

then use keys search maps values.

string temp;         iterator = keys.iterator();         while (it.hasnext()) {             temp = (string) it.next();             system.out.print(temp + ", ");             (entry<string, hashmap<string, list<integer>>> entry : coolmap.entryset()) {                 boolean hasvalue = false;                 (entry<string, list<integer>> innerentry : entry.getvalue().entryset()) {                     string innerkey = innerentry.getkey();                     if (innerkey.equals(temp)) {                         system.out.print(innerentry.getvalue() + ", ");                         hasvalue = true;                     }                 }                 if (!hasvalue) {                     system.out.print(", ,");                 }             }             system.out.println();         }