Java: Random number in fixed range excluding specified number -

in (java android) game, spawn coins @ random positions.

coins can appear @ 1 of 6 positions horizontally across screen (2 max per horizontal level).

what create random number between 0 , 5 first coin, want generate random number excluding position of first coin.

so, example, coin 1 spawned @ random position between 0 , 5 - let's 4.

then next coin needs able choose between 0-3 or 5. (basically 0-5 excluding 4).

i have managed it, it's not elegant , i'm sure there must better/cleaner way achieve this, however, escapes me.

the random(int number) method in code below returns random int 0 number-1 (uses nextint) , randombool() returns random boolean

also, please bear in mind don't want use technique keeps re-generating random number if 1 produces equal 1 trying avoid.

code

    //return random number between 0 , 5 excluding specified number     private int getrandomexcluding(int excludednumber){          //if previous position 0 generate number between 1 , 5         if (excludednumber==0){                 return random(5)+1;         }         //if position 5, generate , return number 0-4         else if (excludednumber==5){                 return random(5);         }          //if number isn't 0 or 5 (then in range of 1-4 use random bool determine         // if going number less or greater number excluding          //true - number lower excluded number         else if(randombool()){              //excluded number 1             if (excludednumber==1){                 return 0;  //only posibility             }              //excluded number > 1             else {                 //return random number between 0 (inclusive) , excluded number (exclusive)                 return random(excludednumber);                 }          //false - number higher excluded number (between exludednumber+1 (inclusive) , 6(exlusive))         else {                 return random(6-(excludednumber+1))+(excludednumber+1);         }     } 

you populate list , shuffle it:

list<integer> numbers = arrays.aslist(1, 2, 3, 4, 5); collections.shuffle(numbers); int coin1 = numbers.get(0); int coin2 = numbers.get(1);