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How do I generate a random number between 0 and some integer n |
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First you would need to create an instance of Random class:
Random random = new Random();
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Then, you can get your random number by calling:
int pick = random.nextInt(maxvalue);
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This would return a value from 0 (inclusive) to maxvalue (exclusive).
For a more cryptographically strong pseudo random generator you may check out
java.security.SecureRandom class. Here the caller may specify the algorithm
name and (optionally) the package provider. Here is a sample code of using
SecureRandom class:
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(seed);
int randInt = random.nextInt(maxvalue);
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