arrays - How Can I Display a N x N Matrix of Random Numbers in Java? -

i'm trying create matrix of random double numbers. matrix must of size n x n , numbers must between 1 , 100. i've been trying sort out ages , know must simple (as is).

here code:

public static void main(string[] args) {      printrandomgraph(randomarray(4)); }  private static double[] randomarray(int n) {       double[] randomarray = new double[n];     double[][] randommatrix = new double [n][n];      random rand = new random();      rand.setseed(system.currenttimemillis());      (int = 0; < n; i++) {          integer r = rand.nextint()% 100;          randomarray[i] = math.abs(r);         (int j = 0; j < n; j++) {             arrays.fill(randommatrix, i, i+1, randomarray);         }       }      return randomarray;   }  private static void printrandomgraph(double[] inputarray) {     int n = inputarray.length;     double[] showarray = new double[n];     double[][] showmatrix = new double [n][n];      (int j = 0; j < n; j++) {         (int = 0; < n; i++) {             double r = inputarray[i];             showarray[i] = r;              arrays.fill(showmatrix, i, i+1, showarray);         }     }      system.out.println(arrays.deeptostring(showmatrix)); } 

when run code random array repeated n times :

[[63.0, 97.0, 64.0, 75.0], [63.0, 97.0, 64.0, 75.0], [63.0, 97.0, 64.0, 75.0], [63.0, 97.0, 64.0, 75.0]]

i think need go top of loop , add new array...? please =(

any appreciated. thank you.

did try this:

private static double[][] randomarray(int n) {     double[][] randommatrix = new double [n][n];      random rand = new random();      rand.setseed(system.currenttimemillis());      (int = 0; < n; i++) {              (int j = 0; j < n; j++) {             integer r = rand.nextint()% 100;              randommatrix[i][j] = math.abs(r);         }      }      return randommatrix; } 

to print graph:

public void printgraph(double[][] array, int n) {     (int = 0; < n; i++) {              (int j = 0; j < n; j++) {             system.out.println(array[i][j]);         }      } } 

to print graph square brackets:

public void printgraph(double[][] array, int n) {         (int = 0; < n; i++) {               system.out.print(" [ ");                (int j = 0; j < n; j++) {                 system.out.print(array[i][j]);             }              //put println instead of print here have each row in new line             system.out.print(" ]");         }     } 

also, seems lot homework, if is, please tag :)