docs: public static String toHalfWidth(String input) {
  
  		char[] c = input.toCharArray();
  		for (int i = 0; i< c.length; i++) {
  			if (c[i] == 12288) {
  				c[i] = (char) 32;
  				continue;
  			}
  			if (c[i]> 65280&& c[i]< 65375)
  				c[i] = (char) (c[i] - 65248);
  		}
  		return new String(c);
  	}