How to have unique random number?

Question

This is how i am generating a unique no in between 1 to 6 and getting appropriate images from the drawable folder.

Random rand = new Random();
// n = the n         


        

Answer 1

Here's the easiest code to do it and store into an array without any repetition:

Random rand = new Random();
int[] ar;
ar = new int[5];

int random = 0;
int [] result_arr=new int[5];
boolean flag=false;

for(int i=0;i<5;i++)
{  
    ar[i]=0;

    do{
        random =rand.nextInt(10);
        flag=false;
        for(int j=0;j<i;j++)
        {
            if(ar[j]==random)
            flag=true;
        }
        if(!flag)
        {
            ar[i]=random;
            break;
        }
     }
     while(true) ;
}

this will create unique numbers in the array