It is unfortunate, but there seems to be much confusion about what 100% Pure Java means. One of the requirements for 100% Pure is that classes do not contain native methods. Since native methods are required to implement the Java Virtual Machine (VM), this in effect means that Java itself is not 100% pure. Only applications can be 100% pure Java. Classes for doing things like communicating with serial ports cannot be 100% pure; however, this does not mean that applications that use these classes cannot be 100% pure. Many 100% pure Java applications/applets have been written that use the SerialPort product.