public class Util {
   
   public static final String fourCC(int fourCC) {
      byte[] fourCCString = new byte[4];
      fourCCString[0] = (byte)fourCC;
      fourCCString[1] = (byte)(fourCC >> 8);
      fourCCString[2] = (byte)(fourCC >> 16);
      fourCCString[3] = (byte)(fourCC >> 24);
      return new String(fourCCString);
   }
   
   public static final int fourCC(String fourCC) {
      if (fourCC.length() > 4)
         throw new IllegalArgumentException("FourCC String must have 4 or less characters.");
      
      // fill fourCC with whitespaces if length is shorter than 4
      if (fourCC.length() < 4) {
         for (int i=0; i<(4-fourCC.length()); i++) {
            fourCC.concat(" ");
         }
      }
      
      int fourCCInt = 0;      
      fourCCInt = (((byte)fourCC.charAt(0) & 0xFFFFFFFF) |
                  ((byte)fourCC.charAt(1) & 0xFFFFFFFF) << 8 |
                  ((byte)fourCC.charAt(2) & 0xFFFFFFFF) << 16 |
                  ((byte)fourCC.charAt(3) & 0xFFFFFFFF) << 24);
      return fourCCInt;
   }
}