Open a database connection

OpenConnection.java

import java.sql.*;

Connection connection = null;

String driver = "org.apache.derby.jdbc.EmbeddedDriver";
String connectionURL = "jdbc:derby:"
connectionURL += my_db_path;

try {
    // load driver
    Class.forName(driver);
} catch (ClassNotFoundException ex) {
    // driver not found!
    System.err.println(ex);
    ex.printStackTrace();

    System.exit(1); // quit
}

try {
    // try to access to db
    connection = DriverManager.getConnection(connectinURL);
} catch (SQLException ex) {
    // access failed!
    System.err.println(ex);
    ex.printStackTrace();

    System.exit(1); // quit
}