title: 2D int array shuffle
body: <p>im new to this but im tring to do a hotel reservation program. </p>
  
  <p>So i have a 2D int array with ALL rooms, when i start the program i want them to be randomly shuffle in to an array called RoomNotInUse or RoomInUse (so evertime i start the program the rooms are randomly generated. </p>
  
  <p>Would be awesome if anyone know a way around this :)</p>
  
  <pre><code>// ARRAYS
  protected static int[][] rooms = {
  {1,1}, {1,2}, {1,3}, {1,4}, {1,5}, 
  {2,1}, {2,2}, {2,3}, {2,4}, {2,5}, 
  {3,1}, {3,2}, {3,3}, {3,4}, {3,5}, 
  {4,1}, {4,2}, {4,3}, {4,4}, {4,5}, 
  {5,1}, {5,2}, {5,3}, {5,4}, {5,5} 
  
  };
  //Declare all hotel rooms 5x5, the first number is the floor and the sec is the room
  private char[][] ROIU = {
  
  };
  //Rooms not in use
  private char[][] RIU = {
  
  };
  //Rooms in use
  
  
  public class roomShuffle {
  
  }
  //Shuffle all rooms in 2 diffrent arrays, ROIN and RIU
  
  public class RoomNotInUse {
  
  }
  //Displayes all the rooms thats not in use  
  
  public class RoomInUse {
  
  }
  //Displayes all rooms in use
  </code></pre>
  
  <p>}</p>