Update JDBC examples

Author: T. E. Kalayci

DB2POJO/src/main/java/db2pojo/Db2PojoPanel.java

@@ -18,7 +18,7 @@
 public class Db2PojoPanel extends JPanel implements ClipboardOwner {
 
     private static final long serialVersionUID = 1L;
-    private final String[] defaultDriver = {"org.sqlite.JDBC", "com.mysql.jdbc.Driver",
+    private final String[] defaultDriver = {"org.sqlite.JDBC", "org.mariadb.jdbc.Driver",
             "oracle.jdbc.driver.OracleDriver", "sun.jdbc.odbc.JdbcOdbcDriver"};
     private final Clipboard clipboard = getToolkit().getSystemClipboard();
     private JTextField txtURL = null;

DB2POJO/src/main/java/db2pojo/database/ConnectionPool.java

@@ -43,11 +43,6 @@ class ConnectionPool {
         passiveConnections = new ArrayList<>(connectionCount);
         activeConnections = new ArrayList<>(connectionCount);
 
-        try {
-            Class.forName(driverName).newInstance();
-        } catch (Exception e) {
-            throw new Exception("Couldn't find database driver!");
-        }
         for (int i = 0; i < connectionCount; i++) {
 
             try {

JDBC/pom.xml

@@ -16,9 +16,9 @@
     </parent>
     <dependencies>
         <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>8.0.33</version>
+            <groupId>org.xerial</groupId>
+            <artifactId>sqlite-jdbc</artifactId>
+            <version>3.47.1.0</version>
         </dependency>
     </dependencies>
 </project>

JDBC/src/main/java/jdbc/ConnectionExample.java

@@ -10,8 +10,13 @@ public static void main(String[] args) {
 		// Get a connection from Database Connection Manager
 		Connection conn = ConnectionManager.getInstance().getConnection();
 		try {
-			// Insert record to database
+			// Create table
 			PreparedStatement ps = conn
+					.prepareStatement("CREATE TABLE Example (Field VARCHAR)");
+			ps.execute();
+
+			// Insert record to database
+			ps = conn
 					.prepareStatement("INSERT INTO Example (Field) VALUES (" + System.currentTimeMillis() + ")");
 			ps.execute();
 			// Select record from database

JDBC/src/main/java/jdbc/Main.java

@@ -1,7 +1,7 @@
 # Database connection URL
-jdbc.url=jdbc:mysql://localhost:3306/vt
+jdbc.url=jdbc:mariadb://localhost:3306/vt
 # Database driver class
-jdbc.driver=com.mysql.jdbc.Driver
+jdbc.driver=org.mariadb.jdbc.Driver
 # Database username
 jdbc.user=user
 # Database password