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  1. import java.util.Arrays;
  2. import java.util.TreeSet;
  3. import java.util.Random;
  4.  
  5. class Example {
  6.     public static void main(String[] args) {
  7.         int min = 1;
  8.         int max = 49;
  9.         int total = 6;
  10.  
  11.         // TreeSet's are always sorted, but slightly slower than HashSets
  12.         // Another option is to use a hashset, convert to a list then sort
  13.         TreeSet<Integer> numbers = new TreeSet<Integer>();
  14.  
  15.         Random r = new Random();
  16.         for(int i = 0; i < total; ++i) {
  17.             int n;
  18.             do {
  19.                 n = r.nextInt(max - min + 1) + min;
  20.             } while(!numbers.add(n));
  21.  
  22.             /* Or if you like confusing code:
  23.             while(!numbers.add(r.nextInt(max - min + 1) + min));
  24.             */
  25.  
  26.         }
  27.         System.out.print("Your Lucky Numbers Are ");
  28.         for(int number : numbers) {
  29.             System.out.print(number + " ");
  30.         }
  31.         System.out.println();
  32.     }
  33. }
Success #stdin #stdout 0.03s 245632KB
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stdin
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Standard input is empty
stdout
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Your Lucky Numbers Are 12 15 24 26 33 39
https://ideone.com/L5IEWA
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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