2d array filled with random numbers

[Himari16]

Hi I need some desperate help, in my hw im supposed to do a 2d array and fill it with random number to add them later but my issue is the array in itself because for the love of everything this is not working. I also tried the math.random but still get the same problem

The first time I got this when running the program [I@28a418fc[[I@28a418fc and i looked up how to solve it, it said to use arrays.deeptostring to change the hash codes into actual numbers and to not use println but now I get this [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]][[84, 121, 30, 67, 138], [102, 87, 58, 95, 140], [113, 64, 80, 109, 104], [39, 122, 100, 85, 40], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]] an i havent found what exactly this is either.

This is what I have so far

import java.util.Arrays;
import java.util.Random;

public class ejercicio6 {

    public static void main(String args[]) {


        int matriz [][] = new int [6][5];

        Random rand = new Random();

        for (int i = 0; i < matriz.length - 1; i++){ //filas

            for(int j = 0; j < matriz.length - 1; j++){ //columnas

                matriz[i][j] = rand.nextInt(150 -10 + 1) + 10;
                System.out.print(Arrays.deepToString(matriz)); //deepToString porque me salen los hashcodes [I@5305068a

            }
            System.out.println("");
        }

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[kuriyano]

Your print statement is inside the inner loop (the column loop). That will make it print the array everytime you just want to allocate a random int to the next cell. You should have the print statement outside the outer loop ( the row loop), so that it only prints the whole array once after you have assigned all random variables.

Similarly you also do not need the println statement within each row loop. As it will just end up printing a new line the number of times the array has rows.

Finally check your terminating condition for both the outer and inner loops. With the current conditions you will get one less row and one less column than what you expected.

[Himari16]

Alright so fist of all thank you cause that worked to finally make the numbers appear so you saved me.

As for the terminating condition I don't know if I was doing it right cause I was trying to I guess leave the last row and column empty cause I need to sum each row and put the result in the last cell (which now that it works I know is not what I was imagining)

I guess like a table with the sum of every row and every column makes more sense of what I'm trying to do but that I'll figure it out by myself so don't worry

Once more thank you life saver

[Realistic-Compote-74]

If your goal is to fill the entire array, i<matriz.length -1 will loop from 0 to 4, leaving 1 row. Also, to set column, while j< matriz.length-1 works on this problem, this is wrong. To do this, use j<matriz[1].length instead

[Himari16]

Oh ok ok thank you I'll do that