Activity 3: Run a JDBC program using the Embedded driver

This activity loads the Derby database engine using a simple Java JDBC program. JDBC is the Java Database Connectivity API and is also the native API for Derby. The program uses the embedded driver to create (if needed) and then connect to the jdbcDemoDB database. You can then populate a table within the database with text. The program demonstrates some basic JDBC processing along with related error handling.

This activity assumes that you have opened a command window, navigated to the DERBYDBS directory, and set the DERBY_HOME environment variable.

The CLASSPATH environment variable is used by Java to locate the binary files (jarfiles and classfiles) needed to run Derby and other Java applications. Before performing this activity, you need to set the CLASSPATH and compile the WwdEmbedded.java Java program.

Copy the program files into the DERBYDBS directory and set the CLASSPATH:
On Windows platforms:
```
copy %DERBY_HOME%\demo\programs\workingwithderby\* .

set CLASSPATH=%DERBY_HOME%\lib\derby.jar;.
```
On UNIX Korn Shell platforms:
```
cp $DERBY_HOME/demo/programs/workingwithderby/* .

export CLASSPATH=$DERBY_HOME/lib/derby.jar:.
```
Important: Include the dot (.) at the end of each command so that your current working directory is included in the CLASSPATH and the files are copied to the correct location.
Compile the WwdEmbedded.java program:
```
javac WwdEmbedded.java
```
Important: Only a command prompt will be displayed if the compilation is successful. The binary file WwdEmbedded.class will be created. If an error is displayed please verify that the Java development kit is properly installed.

Run the program: The WwdEmbedded.java program populates a table with wish list items. It is a simple Java program that prompts the User for text input (up to 32 characters), stores the text entered in a database table and then lists the items stored in the table. The program will continue to ask for wish list items until the word exit is entered or a problem is encountered. Some basic information on program progress is displayed at the beginning and the end of the program.

java WwdEmbedded

org.apache.derby.jdbc.EmbeddedDriver loaded.
Connected to database jdbcDemoDB
 . . . . creating table WISH_LIST

Enter wish-list item (enter exit to end):
a peppermint stick

  _________________________________________________________
On 2006-09-21 15:11:50.412 I wished for a peppermint stick
  ________________________________________________________

Enter wish-list item (enter exit to end):
an all expenses paid vacation

  ________________________________________________________
On 2006-09-21 15:11:50.412 I wished for a peppermint stick
On 2006-09-21 15:12:47.024 I wished for an all expenses paid vacation
  ________________________________________________________

Enter wish-list item (enter exit to end):
exit

Closed connection
Database shut down normally
Working With Derby JDBC program ending.