Add simple Java GUI apps

java-apps/CitiesApp/CitiesGUI.java

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+import javax.swing.*;
+import javax.swing.table.DefaultTableModel;
+import java.awt.*;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+
+public class CitiesGUI extends JFrame {
+    private List<City> cities;
+
+    public CitiesGUI() {
+        super("Cities Viewer");
+        cities = loadCities("../data/cities.txt");
+        setupUI();
+    }
+
+    private List<City> loadCities(String path) {
+        List<City> list = new ArrayList<>();
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(new FileInputStream(path), StandardCharsets.UTF_8))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                String[] parts = line.split("#");
+                if (parts.length == 11) {
+                    String ref = parts[0];
+                    String nameGR = parts[1];
+                    String gender = parts[8];
+                    String nameEN = parts[9];
+                    String state = parts[10];
+                    list.add(new City(ref, nameGR, gender, nameEN, state));
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return list;
+    }
+
+    private void setupUI() {
+        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        String[] columns = {"Greek Name", "Gender", "English Name", "State"};
+        DefaultTableModel model = new DefaultTableModel(columns, 0);
+        for (City c : cities) {
+            model.addRow(new Object[]{c.getNameGR(), c.getGender(), c.getNameEN(), c.getState()});
+        }
+        JTable table = new JTable(model);
+        add(new JScrollPane(table), BorderLayout.CENTER);
+        setSize(600, 400);
+        setLocationRelativeTo(null);
+    }
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> new CitiesGUI().setVisible(true));
+    }
+}

java-apps/CitiesApp/City.java

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+public class City {
+    private String ref;
+    private String nameGR;
+    private String gender;
+    private String nameEN;
+    private String state;
+
+    public City(String ref, String nameGR, String gender, String nameEN, String state) {
+        this.ref = ref;
+        this.nameGR = nameGR;
+        this.gender = gender;
+        this.nameEN = nameEN;
+        this.state = state;
+    }
+
+    public String getRef() { return ref; }
+    public String getNameGR() { return nameGR; }
+    public String getGender() { return gender; }
+    public String getNameEN() { return nameEN; }
+    public String getState() { return state; }
+}

java-apps/NamedEntitiesApp/NamedEntitiesGUI.java

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+import javax.swing.*;
+import javax.swing.table.DefaultTableModel;
+import java.awt.*;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+
+public class NamedEntitiesGUI extends JFrame {
+    private List<NamedEntity> entities;
+
+    public NamedEntitiesGUI() {
+        super("Named Entities Viewer");
+        entities = loadEntities("../data/namedEntities.txt");
+        setupUI();
+    }
+
+    private List<NamedEntity> loadEntities(String path) {
+        List<NamedEntity> list = new ArrayList<>();
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(new FileInputStream(path), StandardCharsets.UTF_8))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                String[] parts = line.split("#");
+                if (parts.length == 11) {
+                    String ref = parts[0];
+                    String nameGR = parts[1];
+                    String gender = parts[8];
+                    String nameEN = parts[9];
+                    String type = parts[10];
+                    list.add(new NamedEntity(ref, nameGR, gender, nameEN, type));
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return list;
+    }
+
+    private void setupUI() {
+        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        String[] columns = {"Greek Name", "Gender", "English Name", "Type"};
+        DefaultTableModel model = new DefaultTableModel(columns, 0);
+        for (NamedEntity e : entities) {
+            model.addRow(new Object[]{e.getNameGR(), e.getGender(), e.getNameEN(), e.getType()});
+        }
+        JTable table = new JTable(model);
+        add(new JScrollPane(table), BorderLayout.CENTER);
+        setSize(700, 400);
+        setLocationRelativeTo(null);
+    }
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> new NamedEntitiesGUI().setVisible(true));
+    }
+}

java-apps/NamedEntitiesApp/NamedEntity.java

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+public class NamedEntity {
+    private String ref;
+    private String nameGR;
+    private String gender;
+    private String nameEN;
+    private String type;
+
+    public NamedEntity(String ref, String nameGR, String gender, String nameEN, String type) {
+        this.ref = ref;
+        this.nameGR = nameGR;
+        this.gender = gender;
+        this.nameEN = nameEN;
+        this.type = type;
+    }
+
+    public String getRef() { return ref; }
+    public String getNameGR() { return nameGR; }
+    public String getGender() { return gender; }
+    public String getNameEN() { return nameEN; }
+    public String getType() { return type; }
+}

java-apps/README.md

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+# Java GUI Applications
+
+This folder contains two simple Swing applications used for the university course "Methodologies for Application Development".
+
+- **CitiesApp** – Reads `data/cities.txt` and displays a table with Greek and English names of selected cities.
+- **NamedEntitiesApp** – Reads `data/namedEntities.txt` and displays a table with different named entities such as museums or airports.
+
+Data files are encoded in UTF-8 and follow the format described in the assignment specification.
+
+To run an application use:
+
+```bash
+javac CitiesApp/*.java
+java -cp CitiesApp CitiesGUI
+```
+
+or
+
+```bash
+javac NamedEntitiesApp/*.java
+java -cp NamedEntitiesApp NamedEntitiesGUI
+```
+
+The GUI simply lists the items and does not implement advanced features.

java-apps/data/cities.txt

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+1#Αθήνα#Αθήνα#Αθήνας#Αθήνα#Αθήνα#Αθήνα#Αθήνα#feminine#Athens#Attica
+2#Θεσσαλονίκη#Θεσσαλονίκη#Θεσσαλονίκης#Θεσσαλονίκη#Θεσσαλονίκη#Θεσσαλονίκη#Θεσσαλονίκη#feminine#Thessaloniki#Central Macedonia
+3#Πάτρα#Πάτρα#Πάτρας#Πάτρα#Πάτρα#Πάτρα#Πάτρα#feminine#Patras#Western Greece

java-apps/data/namedEntities.txt

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+1#Εθνική Πινακοθήκη#Εθνική Πινακοθήκη#Εθνικής Πινακοθήκης#Εθνική Πινακοθήκη#Εθνική Πινακοθήκη#Εθνική Πινακοθήκη#Εθνική Πινακοθήκη#feminine#National Gallery#Museum
+2#Πανεπιστήμιο Αθηνών#Πανεπιστήμιο Αθηνών#Πανεπιστημίου Αθηνών#Πανεπιστήμιο Αθηνών#Πανεπιστήμιο Αθηνών#Πανεπιστήμιο Αθηνών#Πανεπιστήμιο Αθηνών#neuter#University of Athens#University
+3#Διεθνές Αεροδρόμιο Αθηνών#Διεθνές Αεροδρόμιο Αθηνών#Διεθνούς Αεροδρομίου Αθηνών#Διεθνές Αεροδρόμιο Αθηνών#Διεθνές Αεροδρόμιο Αθηνών#Διεθνές Αεροδρόμιο Αθηνών#Διεθνές Αεροδρόμιο Αθηνών#neuter#Athens International Airport#Airport