Adding lines from a file into 2D array Java -


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i'm having trouble trying write syntax in java want file

what i'm doing reading in file , want add specific lines of file elements of 2d array, have written pseudo code below understand im trying 

    try     {         fileinputstream fstream = new fileinputstream(filename);         datainputstream instream = new datainputstream(fstream);         bufferedreader brread = new bufferedreader (new inputstreamreader(instream));          string line;          while ((line = brread.readline()) !=null)         {             //lines 1-3              //{             // add line 1 element 0,0 of array             // add line 2 element 0,1 of array             // add line 3 element 0,2 of array             //}              //lines 4-10             //{             // add line 4 element 1,0 of array             // add line 5 element 1,1 of array             // ect..             //}         }     }     catch (exception e)     {      } }

suppose 2d arrays 3 x 3 (not explained clearly.) algorithm , code similar below, quite simple.

try {     fileinputstream fstream = new fileinputstream(filename);     datainputstream instream = new datainputstream(fstream);     bufferedreader brread = new bufferedreader (new inputstreamreader(instream));      string line;     int linecount = 0;     int mod9 = -1;     int firstindex = -1;     int secondindex = -1;     double[][] array = new double[3][3];     while ((line = brread.readline()) !=null)     {         //lines 1-3          //{         // add line 1 element 0,0 of array         // add line 2 element 0,1 of array         // add line 3 element 0,2 of array         //}         mod9 = linecount % 9 ;         firstindex = mod9 / 3;         secondindex = mod9 % 3;         array[firstindex] += double.parsedouble(line);         linecount++;         //lines 4-10         //{         // add line 4 element 1,0 of array         // add line 5 element 1,1 of array         // ect..         //}     } } catch (exception e) {  }

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