Array problem

Do you need to know where the repeat is? Do you need to know what number is repeated? Or, just "Are all numbers unique?"

If the last, you could try dumping everything into a HashSet. You'd need to create Objects (Integer, Double, etc.) out of the values in the array, but it is the easiest way.

Set mySet = new HashSet();

// Put each element of the array into the Set separately, using a loop.

// (I assume it is an array of primitives. If they aren't primitives, you can make the Set in one line.)

if (mySet.size() == x.length)

{

System.out.println("There were no repeats.");

}

The Set's "add" method will tell you as you put each value in whether that element is already in the Set.

doremifasollatidoa at 2007-7-15 5:08:34 >

Random generator = new Random();

Set<Integer> numbers = new HashSet<Integer>();

while ( ... ) // ADD CODE THAT SAYS "size of set is too small"

{

bool added = numbers.add(Integer.valueOf(generator.nextInt(MAX_NUM));

System.out.println(added);

}

The bool added isn't needed above--it will just tell you if you added the value or if it was a duplicate.

doremifasollatidoa at 2007-7-15 5:08:34 >