TreeMap of Vector

Hello, my situation is this; I would like add element (integer that represent indexes in another Vector) in freqToIndex.Vector;

Code:

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SortedMap <Integer, Vector< Integer> > freqToIndex= new TreeMap <  Integer, Vector< Integer > >(); 
void foo() {
  //_word is another vector
  this.freqToIndex.put( totalFreq, freqToIndex.previuosVector.add (_words.size() -1  );
}

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I don't undertand how to access to the Vector inside the TreeMap. This is my problem at moment...
Any help, please?
thanks,

You have to retrieve the vector by the get method of the map which is referenced by an integer.

Code:

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  Integer rowToRetrieve = null;

  /* set the rowToRetrieve for example */

  /* This is my vector. so I can just method chain to act on it */
  this.freqToIndex.get(rowToRetrieve).add(_words.size() -1);

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Another way to look at it is

Code:

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Vector<Integer> myVector = this.freqToIndex.get(rowToRetrieve);
myVector.add(_words.size() -1);

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