Convert Decimal to Roman numbers / Romanizer HackerEarth Code

Set of Numbers are given to you.
convert them to Roman numbers.
Solution is in Hacker Earth style

static String[] romanizer(int[] num) {
	String ans[] = new String[num.length];
	for(int i=0; i<num.length;i++){ 			
           ans[i]=convertToRoman(num[i]); 		
        }
        return ans; 	
}
static String convertToRoman(int val){                
          String res=""; 
          String huns[] = {"", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"}; 	    
          String tens[] = {"", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"}; 	    
          String ones[] = {"", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"}; 	     	    
          int   size[] = { 0,   1,    2,     3,    2,   1,  2,      3,       4,     2}; 	

          while (val >= 1000) {
	         res=res+'M';
	         val -= 1000;
	  }
	  
	  res=res+huns[val/100];
	  val = val % 100;
	  
          res=res+ tens[val/10];  
	  val = val % 10;
	  
          res=res+ ones[val];
	  return res;
	}