How to generate a random number in java with array bounds?

I want to ask how to generate a random number in java , i know it is done by random.nextint() but i want to check if the number is not what i wanted then it should be rejected and a new random number should be generated .

I want something like this :

Integer[] in = {1,2,3,4,5};    
int a = new Random().nextInt(10);
for(int i=0;i<in.length ;i++)
   if(a==in[i])
      //new random number

if the number is present in the above array (in) then new random number should be generated