Hello!

I'm learning to program at school now, and i have a problem i can't figure out. I'm trying to create an array and fill it with random numbers. But i want the numbers to be unique.

int[] list = new int[10];

list[0] = r.nextInt(20);

for(int i = 1; i < list.length; i++) {

 list[i] = r.nextInt(20);
 for(int j = 0; j < i; j++) {
      while(list[i] == list[j]) {
             list[i] = r.nextInt(10);
      }
 }

}

I can not figure out how to make this work and it is really bugging my mind. Does anybody have any tips?

Edit* Sorry for the messed up edit. first time posting code, so i don't know how to make it appear as code yet :)

Hey! First time posting, I just need some guidance on how to complete this question (I'm just now getting into Java). Alright so this is what I have so far.

public int makeIntArray(int size, int low, int high)
{
    int [] array1 = new int [size];
    for(int i = 0; ???)

}

Alright, where the "???" is, is where I'm stuck. I'm not sure if I'm even supposed to use a for loop to tackle this question. All the information for this question, the method is called makeIntArray and it has three int parameters, size, low, and high, I needed to create an array based on the size parameter (I did that), and now I have to populate the array with random numbers from low to high. I just want someone to help me tackle this question so in the future, I can handle this question with no help. Thanks!

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("");
        }