You actually run Java applications with the Java tool named, appropriately enough, java. This tool is a program that comes with the Java SDK (java.exe in Windows, in the Java bin directory).
Running Java Apps Without the SDK
You don't need the full Java SDK to simply run Java applications. You can get the java tool in the Java Runtime Environment (JRE), which you can get from the Sun Java site at http://java.sun.com/jdk.
To run the ch10_01 application, I use the java tool like this on the command line:
The result appears at once:
%java ch10_01 Welcome to Java
You can see what this looks like in Figure 10-1, where I'm running this application in a DOS window in Windows.