Java Samples 2. SQL connections.

public static void voidName(String query) throws SQLException {
    Connection connectionName = DriverManager.getConnection("url" /* хост:порт/база */, "user", "pass");
    if (connectionName==null) { 
        System.exit(0);             
    }
    Statement statementName = connectionName.createStatement(); 
    ResultSet resultsetName = statementName.executeQuery("query"); 
    while(resultsetName.next()) { 
        resultsetName.getString("columnName");
        some_actions_with_columnName
    }
}