How to assign random numbers in a 2D array matrix ?

Question

Hello guys. I have a homework in java and I have to create a 10x10 matrix and assign random numbers to each element. I could create the matrix and random int part but I could not make it for each element in the matrix. Can someone help please ?

Answer 1

Can you show us the code you have been working on? Have you tried using a nested for loop to iterate through the 2D matrix and assign the random numbers manually?

Answer 2

You're very close! Instead of storing the random number in a variable and assigning the same number over the matrix, generate and assign the random number on the fly.

for (...)
for (...)
a[x][y] = randomNum.nextInt();

Answer 3

Thank you so much sir. I will try when I am available.

Answer 4

Random randumNum = new Random();
int s;
s = randomNum.nextInt();

for (int x = 0; x<10; x++){
for(int y = 0; y<10; y++){
a[x][y]=s;

So this is the matrix and random number part of the code, when I do this, the answer is like :
3 3 3
3 3 3
3 3 3
But every element has to be different. I couldnt do it.