added check if letter and build Hashmap counter for existing words

src/main/java/domain/FileManager.java

@@ -2,40 +2,100 @@ package domain;
 
 import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.text.PDFTextStripper;
+
 import javax.swing.*;
 import javax.swing.filechooser.FileNameExtensionFilter;
-import java.io.File;
+
+import java.awt.*;
+import java.io.*;
+import java.util.HashMap;
+import java.util.Map;
+
 
 public class FileManager {
+    File inputFile;
+    String originalPath;
+    String goalPath;
 
-    public void loadFile() {
-        try{
+    public FileManager() {
+        originalPath = "quelle.pdf";
+        goalPath = "ziel.txt";
+        inputFile = null;
+    }
+
+    public OutputStream loadFilePath() {
+        InputStream in;
+        OutputStream out = null;
+        
+        try {
+            in = new FileInputStream(originalPath);
+            out = new FileOutputStream(goalPath);
+
+            byte[] buffer = new byte[1024];
+            int gelesen;
+
+            while ((gelesen = in.read(buffer)) > -1) {
+                out.write(buffer, 0, gelesen);
+            }
+
+            in.close();
+            out.close();
+            return out;
+        }
+        catch (IOException e) {
+            e.printStackTrace();
+        }
+        return out;
+    }
+
+    public File loadFileGUI() {
+        try {
             JFileChooser fileChooser = new JFileChooser();
             fileChooser.setFileFilter(new FileNameExtensionFilter("PDF Files", "pdf"));
-
             int result = fileChooser.showOpenDialog(null);
 
             if (result == JFileChooser.APPROVE_OPTION) {
-                File selectedFile = fileChooser.getSelectedFile();
-                System.out.println("Ausgewählte Datei: " + selectedFile.getAbsolutePath());
+                inputFile = fileChooser.getSelectedFile();
+            }
+            return inputFile;
+        } catch (HeadlessException e) {
+            throw new RuntimeException(e);
+        }
+    }
 
-                try (PDDocument document = PDDocument.load(selectedFile)) {
-                    PDFTextStripper pdfStripper = new PDFTextStripper();
-                    String text = pdfStripper.getText(document);
-                    String regex = "[,\\s\\.:/]";
-                    String[] words = text.split(regex);
-                    for(String word : words) {
-                        System.out.println(word);
+    public boolean processFile(File inputFile){
+        boolean success = false;
+        try {
+            PDDocument document = null;
+            HashMap<String, Integer> filteredWords = new HashMap<>();
+            if(inputFile != null) {
+                document = PDDocument.load(inputFile);
+                PDFTextStripper pdfStripper = new PDFTextStripper();
+                String text = pdfStripper.getText(document);
+                String splittedText = "[,\\s\\.:/!§$%&/()=?+*~#.;_<>^°]";
+                String[] textWords = text.split(splittedText);
+                for(String word : textWords){
+//                    if(Character.isLetter(word.charAt(0)) && Character.isLetter((word.charAt(word.length() - 1)))) {
+                        if (filteredWords.containsKey(word)) {
+                            filteredWords.compute(word, (k, counter) -> counter + 1);
+                        }
+//                    }
+                    else {
+                        filteredWords.put(word, 0);
                     }
                 }
+                for(Map.Entry e : filteredWords.entrySet()){
+                    System.out.println(e.getKey() + " = " + e.getValue());
+                }
+                if (document != null) {
+                    document.close();
+                }
             }
-            else {
-                System.out.println("Dateiauswahl abgebrochen.");
-            }
-
-        } catch (Exception e) {
+            success = true;
+        } catch (Exception e){
             e.printStackTrace();
         }
+        return success;
     }
 
     public void saveFile(){}

src/main/java/facade/WordCloudManager.java

@@ -1,4 +1,30 @@
 package facade;
 
+import domain.FileManager;
+import domain.PictureManager;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.OutputStream;
+
 public class WordCloudManager {
+    FileManager fileManager;
+    PictureManager pictureManager;
+
+    public WordCloudManager() {
+        fileManager = new FileManager();
+        pictureManager = new PictureManager();
+    }
+
+    public boolean loadFileGUI() {
+        boolean success = false;
+        File inputFile = fileManager.loadFileGUI();
+        success = fileManager.processFile(inputFile);
+        return success;
+    }
+
+    public void loadFilePath() {
+        OutputStream inputFile = fileManager.loadFilePath();
+//        fileManager.processFile(null, inputFile);
+    }
 }

src/main/java/tui/TUI.java

@@ -1,30 +1,52 @@
 package tui;
 
 import domain.FileManager;
+import facade.WordCloudManager;
 
+import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.util.Scanner;
 
 public class TUI {
+    boolean isRunning;
 
     public TUI(){
+        isRunning = true;
         tui();
     }
 
     public void tui() {
         Scanner scan = new Scanner(System.in);
-        int option = scan.nextInt();
+        while(isRunning) {
+            System.out.println("Welcome to Word Cloud.\nMenu:\n\n(0) Load File from main path\n(1) Load File with Gui" +
+                    "\n(2) Save File\n(3) Show Picture\n(4) Exit");
+            int option = scan.nextInt();
+            WordCloudManager wcm = new WordCloudManager();
 
-        switch (option) {
-            case (0):
-                //Load File
-                FileManager fileManager = new FileManager();
-                fileManager.loadFile();
-            case (1):
-                //Save File
-            case (2):
-                //Show Picture
-            case (3):
-                //Exit
+            switch (option) {
+                case (0):
+                    //Load File Path
+                    wcm.loadFilePath();
+                    break;
+                case (1):
+                    //Load File GUI
+                    if(wcm.loadFileGUI()) {
+                        System.out.println("File loaded successful!\n");
+                    }
+                    break;
+                case (2):
+                    //Save Picture
+                    break;
+                case (3):
+                    //Show Picture
+                    break;
+                case (4):
+                    //Exit
+                    isRunning = false;
+                    System.out.println("Close Program!");
+                    break;
+            }
         }
+        scan.close();
     }
 }