Trouble with a data validating loop.

So I tried to make a data validation loop to make sure no single number in an array are the same.
At first I thought it was working fine, but after the sixth test, I noticed I had two of the number "5".
Based on looking at my code, it seems like it could work, but I could not be seeing something significant.
Anyone have any advice or suggestions?
Oh and also, MAX_PICK is a static final int set to 47
picks[0] = randomNumbers.nextInt(MAX_PICK);
picks[1] = randomNumbers.nextInt(MAX_PICK);
picks[2] = randomNumbers.nextInt(MAX_PICK);
picks[3] = randomNumbers.nextInt(MAX_PICK);
picks[4] = randomNumbers.nextInt(MAX_PICK);
while(!valid)
 for(int i=0;i<=4;i++)
 if (picks[i] == picks[0] ||
 picks[i] == picks[1] ||
 picks[i] == picks[2] ||
 picks[i] == picks[3] ||
 picks[i] == picks[4])
 picks[i] = randomNumbers.nextInt(MAX_PICK);
 valid = true;
}One thing I just noticed is also, lets say i = 4 and when it compares picks[i] to picks[4] , it will go in the statement anyway, causing it to change picks[4] to another number which could by chance be the same as picks[3]. Is there a way around this? I was thinking about maybe a while loop with the condition the if statement has, but then the loop would run forever. Any insight?
Much Appreciated.

* Created on 2007年10月10日
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
import java.util.*;
public class MyRan {
 static int picks[];
public static void main(String args[]) {
 int MAX_NUM = 5;
 picks = new int[5];
 Random generator2 = new Random( System.currentTimeMillis() );
 // picks[j] = generator2.nextInt(MAX_PICK+1);
 System.out.println("======");
 for(int i=0;i<=4;i++)
 picks[i] = generator2.nextInt(MAX_NUM)+1;
 while(!check(picks))
 for (int i=0; i<5; i++)
 for (int k=0; k<5; k++)
 if (i!=k)
 boolean genSuccess = false;
 if (picks==picks[k])
 while (!genSuccess)
 picks[k] = generator2.nextInt(MAX_NUM)+1;
 if (picks[i]!=picks[k])
 genSuccess = true;
 for (int i=0; i<5; i++) {
 System.out.println(picks[i]);
public static boolean check(int input[])
 int duplicateCount = 0;
 for (int i=0; i<input.length; i++)
 for (int k=0; k<input.length; k++)
 if (i!=k)
 if (input[i]==input[k])
 duplicateCount++;
 if (duplicateCount>0)
 return false;
 else
 return true;

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Dave Baker | AIDE for LightSwitch | Xpert360 blog | twitter : @xpert360 | Xpert360 website | Opinions are my own. For better forums, remember to mark posts as helpful/answer.

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