Mine

	public static String toBinaryString (int value) {		StringBuffer sb = new StringBuffer();				for (int i = 31; i != 0; i--) {				sb.append(isBitSet(value, i) ? '1' : '0');			}				return sb.substring(sb.indexOf("1"));	}		public static boolean isBitSet (int value, int n) { 		return (value & (1 << n)) == (1 << n); 	}