Best way to create 5D or 6D array in java -


i working on redesigning of code in 6d array created . required cplex linear calculation.

now, there api's can support 1d or int variable in cplex not important have 6 dimension array. mapping important variable required when retrieing method.

is there way of replacing 6d array. in simplying complexity of code.

-> can replace somehow 6d array , store variable in 1d array or int variable.. -> tried hashmap key list , value integer taking more time because hashmap internally uses array.

sample code is:

int [][][][][][] testvariable = new int [2][2][3][5][2][2];         hashmap<list<integer>, integer> mapping = new hashmap<list<integer>, integer>();         int[] arrayadd = new int[11111];      (int =0; <= 2; a++) {                (int l = 0; l < 2; l++) {                 (int y = 0; y < 3; y++) {                     (int r = 0; r < 5; r++) {                         for(int oc=0; oc< 2; oc++){                             for(int c=0; c< 2; c++){                                  // usual array of 6d                                  testvariable[a][l][y][r][oc][c]=count;                                  // first method ( takes more time array)                                   linkedlist<integer> listadd = new linkedlist<integer>();                                 listadd.add(a);                                 listadd.add(l);                                 listadd.add(y);                                 listadd.add(r);                                 listadd.add(oc);                                 listadd.add(c);                                 mapping.put(listadd, count);                                  // second method .. still testing doesnt make sense)                                  arrayadd[a + l + y + r + oc + c] = count;                               //  arrays.fill(arrayadd, count);                                 //system.out.println("value of list  " + listadd);                                 count ++;                          }                     }                 }             }        }   }

if know each of dimensions' lengths won't change, can simulate 6d array 1d array. trick multiply indexes last index c high enough number there won't collisions between distinct sets of 6d indexes mapping same 1d index. 

int[] onedarray = new int[2*2*3*5*2*2];

and calculation of 1d index, using 6 6d indexes. multiplying product of dimensions' lengths after each particular 6d index avoid collisions.

int onedindex = 2*3*5*2*2 *  // last 5 dimensions' lengths               +   3*5*2*2 * l  // last 4 dimensions' lengths; variable letter l               +     5*2*2 * y  // last 3 dimensions' lengths               +       2*2 * r  // last 2 dimensions' lengths               +         2 * oc // last dimension's length               +             c; // no multiplier necessary last index

it better use constants each of dimensions' lengths here, reduce hard-coding.


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