FIlling a 2D array with random integers java

I am trying to create an nxn array full of random integers between 1 and 10. When I try to print it out, I am getting an odd number of integers not filling an array, and never up to the correct number of integers (for instance, a supposed 5x5 array is returning 17 integers). Code snippet follows, assume all variable are declared correctly unless contained in here and java.util.Random is imported.

if (choice==1){
     Random rand = new Random();
     System.out.println("Please input a power n for (nxn array) between 1-6");
     int power = kb.nextInt();
     int[][] randMatrix = new int[power-1][power-1];
     if (power < 1 || power > 6){
        System.out.println("Invalid power");
     }else{
        for (i=0; i<randMatrix.length; i++){
           for (j=0; j<randMatrix.length; j++){
              randMatrix[i][j] = rand.nextInt(9);
           }
        }for (i=0; i<randMatrix.length; i++){
           for (j=0; j<randMatrix.length; j++){
              System.out.println(randMatrix[i][j]);
           }
        }
     }
  }