implemented the question edit

src/main/java/at/ionas999/questioncatalog/controller/ViewController.java

@@ -14,6 +14,7 @@ import javafx.scene.control.*;
 import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 
 public class ViewController {
     @FXML
@@ -32,6 +33,7 @@ public class ViewController {
     private Question currentQuestion = null;
     private ObservableList<QuestionCatalog> catalogs;
     private ObservableList<Question> questions;
+    private boolean isInEditState = false;
 
     @FXML
     private void initialize() throws SQLException {
@@ -43,8 +45,9 @@ public class ViewController {
 
     private void addListenerToListView() {
         questionListView.getSelectionModel().selectedItemProperty().addListener((observableValue, oldValue, newValue) -> {
-            currentQuestion = (Question) newValue;
             if (newValue != null) {
+                currentQuestion = (Question) newValue;
+                System.out.println("changed " + currentQuestion);
                 Question q = (Question) newValue;
                 questionField.setText(q.getQuestion());
                 answerField.setText(q.getAnswer());
@@ -74,14 +77,60 @@ public class ViewController {
 
     @FXML
     private void deleteQuestion(ActionEvent actionEvent) {
-        questions.remove(currentQuestion);
+        if(!showConfirmationButton("Do you want to proceed with deletion of the question: \n" + currentQuestion.getQuestion()))
+        {
+            return;
+        }
+
         QuestionService.DeleteQuestion(currentQuestion.getId());
+        questions.remove(currentQuestion);
         this.questionListView.refresh();
         this.currentQuestion = null;
     }
 
     @FXML
-    private void editQuestion(ActionEvent actionEvent) {
+    private void editQuestion(ActionEvent actionEvent) throws SQLException {
+       if(this.isInEditState){
+           this.currentQuestion.setQuestion(this.questionField.getText());
+           this.currentQuestion.setAnswer(this.answerField.getText());
+          QuestionService.UpdateQuestion(this.currentQuestion);
 
+           this.editButton.setText("Edit");
+           questionListView.refresh();
+
+           this.isInEditState = false;
+           this.setEditableAndSetDisabled(false);
+       }
+       else {
+           this.setEditableAndSetDisabled(true);
+           this.editButton.setText("Save");
+           this.isInEditState = true;
+       }
+    }
+
+    private void setEditableAndSetDisabled(boolean value)
+    {
+        questionField.setEditable(value);
+        answerField.setEditable(value);
+        this.questionListView.setDisable(value);
+        this.deleteButton.setDisable(value);
+    }
+
+
+    private boolean showConfirmationButton(String content) {
+
+        Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
+        alert.setTitle("Confirmation Dialog");
+        alert.setHeaderText("Are you sure?");
+        alert.setContentText(content);
+
+        ButtonType yesButton = new ButtonType("Yes");
+        ButtonType cancelButton = new ButtonType("Cancel");
+
+        alert.getButtonTypes().setAll(yesButton, cancelButton);
+
+        Optional<ButtonType> result = alert.showAndWait();
+
+        return result.filter(buttonType -> buttonType == yesButton).isPresent();
     }
 }

src/main/java/at/ionas999/questioncatalog/services/QuestionService.java

@@ -66,4 +66,23 @@ public class QuestionService {
 
         return true;
     }
+    public static void UpdateQuestion(Question question) throws SQLException {
+        try(Connection connection = ServiceBase.GetJDBCConnection()){
+            String insertStmt = "update QUESTION set " +
+                    "QUESTION = ?," +
+                    "ANSWER=?," +
+                    "QUESTIONCATALOGID=?" +
+                    "where ID = ?";
+
+            try (PreparedStatement statement = connection.prepareStatement(insertStmt)){
+                statement.setInt(3, question.getQuestionCatalogId());
+                statement.setInt(4, question.getId());
+                statement.setString(1, question.getQuestion());
+                statement.setString(2, question.getAnswer());
+                statement.execute();
+            }
+        }
+
+
+    }
 }