Fixed DB connection and java version issue

src/main/java/org/example/petshopdesktop/controllers/MainLayoutController.java

@@ -111,7 +111,8 @@ public class MainLayoutController {
             spContentArea.getChildren().clear();
             spContentArea.getChildren().add(view);
         } catch (Exception e) {
-            System.out.println("Error loading view: " + fxmlFile);
+            System.err.println("Error loading view: " + fxmlFile);
+            e.printStackTrace();
         }
     }
 

src/main/java/org/example/petshopdesktop/database/ConnectionDB.java

@@ -2,6 +2,9 @@ package org.example.petshopdesktop.database;
 
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
@@ -9,8 +12,7 @@ import java.util.Properties;
 
 public class ConnectionDB {
     /**
-     * Method to try and connect to the database sing cnnection.properties located in the
-     * root of C drive
+     * Method to try and connect to the database using connectionpetstore.properties.
      * @return Connection to the database
      */
     public static Connection getConnection(){
@@ -18,10 +20,23 @@ public class ConnectionDB {
         String user = "";
         String password = "";
 
-        try{
-            //Read connection.properties file
-            FileInputStream fis = new FileInputStream("c:\\connectionpetstore.properties"); //location of connection can be changed here
-            Properties prop = new Properties();
+        Properties prop = new Properties();
+        Path propsPath;
+
+        String explicitPath = System.getenv("PETSTORE_DB_PROPS");
+        if (explicitPath != null && !explicitPath.isBlank()) {
+            propsPath = Paths.get(explicitPath);
+        } else {
+            Path cwd = Paths.get(System.getProperty("user.dir"), "connectionpetstore.properties");
+            Path xdg = Paths.get(System.getProperty("user.home"), ".config", "petstore", "connectionpetstore.properties");
+            Path legacyWindows = Paths.get("./connectionpetstore.properties");
+
+            if (Files.exists(cwd)) propsPath = cwd;
+            else if (Files.exists(xdg)) propsPath = xdg;
+            else propsPath = legacyWindows;
+        }
+
+        try (FileInputStream fis = new FileInputStream(propsPath.toString())) {
             prop.load(fis);
             url = prop.getProperty("url");
             user = prop.getProperty("user");
@@ -31,12 +46,8 @@ public class ConnectionDB {
             throw new RuntimeException("Problem with reading connection info: "+e.getMessage());
         }
 
-        Connection conn = null;
-
         try{
-            //try to get connection with the data taken from connection.properties
-            conn = DriverManager.getConnection(url,user,password);
-            return conn;
+            return DriverManager.getConnection(url,user,password);
         }
         catch (SQLException e) {
             throw new RuntimeException("Problem with database connection: "+e.getMessage());