Hello, how would you assure that this code did not generate two identical random numbers? is an array of 6 rows and 10 columns to which I assign random numbers from 1 to 1000
int[][] num = new int[6][10];
for(int f=0;f<=5;f++){
for(int c=0;c<=9;c++){
num[f][c]=(int) (Math.random()*1000+1);
}
}
You can create a number register array and check if the random released is in the registry, if it repeats the operation but you register in your matrix and continue:
ArrayList<int> registry = new ArrayList<int>();
int random;
int[][] num = new int[6][10];
for(int f=0;f<=5;f++){
for(int c=0;c<=9;c++){
do{
random = (int) (Math.random()*1000+1);
}while(!IntStream.of(registry).anyMatch(x -> x == random));
registry.add(random);
num[f][c]= random;
}
}