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random numbers gen

j srinivas
Greenhorn

Joined: Apr 08, 2008
Posts: 16
well iam unable to create random numbers betn 1-100,without repetetion.
iam declaring an array to store all random numbers.
then generate an array number and compare it with array elements
but it is not getting done
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 39549
    
  27
Is there a particular reason you're not using java.util.Random.nextInt ? It's not easy to program a good RNG on your own.


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Alberto Caraz
Greenhorn

Joined: Apr 27, 2007
Posts: 18
By without repetition you mean you want to randomly permute a sequence of numbers and then show them one by one? If that's the case I would recommend creating a list of numbers from 1 to n and then calling Collections.shuffle on it. Then your "ith" random number will be the "ith" element of this sequence.
 
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