| Method | When to Use | Command | 
| Run ij as a standalone command. | Use this method if you are relatively new to the Java programming
language and new to Derby. | You must set
your environment variables before you can run the ij tool
using this method. To run the ij script from the command
line use: ij You must add the DERBY_HOME/bin directory
in your PATH environment variable before you can run the ij tool.  The ij script
sets up the environment variables like CLASSPATH and starts the ij tool. | 
| Run ij using the jar file that is located in the
directory where ij resides. | Use this method if you are new to Derby,
but are familiar with the Java programming language. | You must set the DERBY_HOME environment
variable before you can run the ij tool using this method. On
UNIX, the command is: java -jar $DERBY_HOME/lib/derbyrun.jar ij On
Windows, the command is: java -jar %DERBY_HOME%\lib\derbyrun.jar ij  | 
| Run ij using the java command. | Use this method if you are familiar with both the Java programming
language and Derby, and
you have already set the java.exe file in your command execution
PATH. | You must set your CLASSPATH. Use the steps specified in Manually setting the CLASSPATH environment variable.
Then specify the class name in the java command.  For example: java org.apache.derby.tools.ij  |