stage three

Java/Swing/src/editor/ApplicationRunner.java

@@ -0,0 +1,16 @@
+// This is a personal academic project. Dear PVS-Studio, please check it.
+// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+package editor;
+
+import javax.swing.*;
+
+class ApplicationRunner {
+    public static void main(final String[] args) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                new TextEditor();
+            }
+        });
+    }
+}

Java/Swing/src/editor/TextEditor.java

@@ -0,0 +1,166 @@
+// This is a personal academic project. Dear PVS-Studio, please check it.
+// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+package editor;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public class TextEditor extends JFrame {
+    private JTextArea textArea;
+    private JTextField fileName;
+    private JButton save;
+    private JButton load;
+    private JPanel main;
+    private JPanel buttons;
+    private JScrollPane textScroll;
+    private AbstractAction saveAction;
+    private AbstractAction loadAction;
+    private AbstractAction exitAction;
+    private JMenuBar menuBar;
+    private JMenuItem loadMenuItem;
+    private JMenuItem saveMenuItem;
+    private JMenuItem exitMenuItem;
+
+    public TextEditor() {
+        createWidgets();
+        createActions();
+        setupLayout();
+        setupActions();
+        setupMenu();
+        setupStyle();
+        setupMainWindowParameters();
+    }
+
+    private void setupMenu() {
+        JMenu file = new JMenu("File");
+
+        file.add(loadMenuItem);
+        file.add(saveMenuItem);
+
+        file.addSeparator();
+
+        file.add(exitMenuItem);
+
+        menuBar.add(file);
+    }
+
+    private void createActions() {
+        saveAction = new AbstractAction() {
+            {
+                putValue(NAME, "Save");
+            }
+            @Override
+            public void actionPerformed(final ActionEvent e) {
+                File file = new File(fileName.getText());
+                try {
+                    PrintWriter printWriter = new PrintWriter(file);
+                    printWriter.println(textArea.getText());
+                    printWriter.close();
+                } catch (FileNotFoundException e1) {
+                    e1.printStackTrace();
+                }
+            }
+        };
+
+        loadAction = new AbstractAction() {
+            {
+                putValue(NAME, "Load");
+            }
+            @Override
+            public void actionPerformed(final ActionEvent e) {
+                byte[] encoded = null;
+                try {
+                    encoded = Files.readAllBytes(Paths.get(fileName.getText()));
+                } catch (IOException e1) {
+                    e1.printStackTrace();
+                }
+                textArea.setText(new String(encoded, StandardCharsets.UTF_8));
+            }
+        };
+
+        exitAction = new AbstractAction() {
+            {
+                putValue(NAME, "Exit");
+            }
+            @Override
+            public void actionPerformed(final ActionEvent e) {
+                dispose();
+            }
+        };
+    }
+
+    private void setupActions() {
+        save.addActionListener(saveAction);
+        load.addActionListener(loadAction);
+
+        saveMenuItem.setAction(saveAction);
+        loadMenuItem.setAction(loadAction);
+        exitMenuItem.setAction(exitAction);
+    }
+
+    private void setupMainWindowParameters() {
+        setTitle("Text Editor");
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+        setJMenuBar(menuBar);
+        setSize(400,400);
+        setVisible(true);
+    }
+
+    private void setupLayout() {
+        main.setLayout(new BoxLayout(main, BoxLayout.Y_AXIS));
+
+        buttons.setLayout(new BoxLayout(buttons, BoxLayout.X_AXIS));
+        buttons.add(fileName);
+        buttons.add(Box.createRigidArea(new Dimension(12, 0)));
+        buttons.add(save);
+        buttons.add(Box.createRigidArea(new Dimension(12, 0)));
+        buttons.add(load);
+
+        JPanel textPanel = new JPanel();
+        textPanel.setLayout(new BoxLayout(textPanel, BoxLayout.X_AXIS));
+        textPanel.add(textScroll);
+
+        main.add(buttons);
+        main.add(Box.createRigidArea(new Dimension(0, 12)));
+        main.add(textPanel);
+
+        add(main);
+    }
+
+    private void createWidgets() {
+        main = new JPanel();
+        buttons = new JPanel();
+        textArea = new JTextArea(10, 10);
+        fileName = new JTextField(30);
+        save = new JButton("Save");
+        load = new JButton("Load");
+        textScroll = new JScrollPane(textArea);
+        menuBar = new JMenuBar();
+        loadMenuItem = new JMenuItem();
+        saveMenuItem = new JMenuItem();
+        exitMenuItem = new JMenuItem();
+    }
+
+    private void setupStyle() {
+        main.setBorder(BorderFactory.createEmptyBorder(12,12,12,12));
+
+        Font font = textArea.getFont();
+        float size = font.getSize() + 2.0f;
+        textArea.setFont(font.deriveFont(size));
+
+        Dimension maxSize = fileName.getPreferredSize();
+        fileName.setMaximumSize(maxSize);
+
+        buttons.add(Box.createGlue());
+        buttons.setMaximumSize(new Dimension(buttons.getMaximumSize().width,
+                buttons.getPreferredSize().height));
+    }
+}