displays binary string from int

toBinary.groovy

void toBinary(int decimal)
{    
   int[] binary = new int[40]
   int index = 0
   String bin = ""
   while(decimal > 0)
   {   
      binary[index++] = decimal%2
      decimal = decimal/2
   }    
   for(int i = index-1; i >= 0; i--)
   {    
      bin += binary[i]
   }

   print bin.padLeft(4, '0')
   println ""
}

(0..15).each {
   toBinary(it)
}