title: How can I prevent the overlapping random numbers
body: <p>How would i prevent duplicating numbers from random numbers.
  I need to generate 5 numbers between 1 and 9 that are each different.
  I would often get same numbers like 23334, how can i prevent that?
  Any help would be great!</p>
  
  <pre><code>    int num2 = (int) Math.round((Math.random()*9) +1);
      int num1 = (int) Math.round((Math.random()*9) +1);
      int num5 = (int) Math.round((Math.random()*9) +1);
      int num3 = (int) Math.round((Math.random()*9) +1);
      int num4 = (int) Math.round((Math.random()*9) +1);
  </code></pre>