In the installation chapter, we discussed how to connect the database manually. In this chapter, we will discuss how to connect the database programmatically (using Java programming).
Take a look at the following program, which will start the server and create a connection between the Java application and the database.
Example
import java.sql.Connection;
import java.sql.DriverManager;
public class ConnectDatabase {
public static void main(String[] args) {
Connection con = null;
try {
//Registering the HSQLDB JDBC driver
Class.forName("org.hsqldb.jdbc.JDBCDriver");
//Creating the connection with HSQLDB
con = DriverManager.getConnection("jdbc:hsqldb:hsql://localhost/testdb", "SA", "");
if (con!= null){
System.out.println("Connection created successfully");
}else{
System.out.println("Problem with creating connection");
}
} catch (Exception e) {
e.printStackTrace(System.out);
}
}
}
Save this code into the ConnectDatabase.java file. You will have to start the database using the following command.
\>cd C:\hsqldb-2.3.4\hsqldb
hsqldb>java -classpath lib/hsqldb.jar org.hsqldb.server.Server --database.0
file:hsqldb/demodb --dbname.0 testdb
You can use the following command to compile and execute the code.
\>javac ConnectDatabase.java
\>java ConnectDatabase
After execution of the above command, you will receive the following output −
Connection created successfully
