1st lesson

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import java.awt.Toolkit;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import java.io.*;

public class Main extends JFrame {

    private JPanel contentPane;
    private JTextField textFieldFile;
    private JTextArea textArea;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Main frame = new Main();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public Main() {
        setIconImage(Toolkit.getDefaultToolkit().getImage(Main.class.getResource("/javax/swing/plaf/metal/icons/ocean/question.png")));
        setTitle("Java Application");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 476, 333);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        JLabel label = new JLabel("\u0423\u043A\u0430\u0436\u0438\u0442\u0435 \u043F\u0443\u0442\u044C \u043A \u0444\u0430\u0439\u043B\u0443:");
        label.setBounds(10, 11, 120, 14);
        contentPane.add(label);

        textFieldFile = new JTextField();
        textFieldFile.setBounds(140, 8, 310, 20);
        contentPane.add(textFieldFile);
        textFieldFile.setColumns(10);

        JButton buttonNew = new JButton("\u0421\u043E\u0437\u0434\u0430\u0442\u044C \u043D\u043E\u0432\u044B\u0439");
        buttonNew.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String fileName = textFieldFile.getText().trim();

                if (fileName.isEmpty()) {
                    JOptionPane.showMessageDialog(null, "Enter file path!", "Error", 0);
                } else {
                    File newFile = new File(fileName);

                    try {
                        newFile.createNewFile();
                        JOptionPane.showMessageDialog(null, "File created!", "Message", 1);
                    } catch (IOException ex) {
                        JOptionPane.showMessageDialog(null, "File don't create!", "Error!", 0);
                    }
                }
            }
        });
        buttonNew.setBounds(10, 36, 120, 23);
        contentPane.add(buttonNew);

        JButton buttonDelete = new JButton("\u0423\u0434\u0430\u043B\u0438\u0442\u044C");
        buttonDelete.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String fileName = textFieldFile.getText().trim();

                if (fileName.isEmpty()) {
                    JOptionPane.showMessageDialog(null, "Enter file path!", "Error", 0);
                } else {
                    File deleteFile = new File(fileName);

                    if (deleteFile.exists()) {
                        deleteFile.delete();
                        JOptionPane.showMessageDialog(null, "File deleted", "Message", 1);
                    } else {
                        JOptionPane.showMessageDialog(null, "File don't exist", "Error", 0);
                    }
                }
            }
        });
        buttonDelete.setBounds(10, 70, 120, 23);
        contentPane.add(buttonDelete);

        JButton buttonRename = new JButton("\u041F\u0435\u0440\u0435\u0438\u043C\u0435\u043D\u043E\u0432\u0430\u0442\u044C");
        buttonRename.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String fileName = textFieldFile.getText().trim();

                if (fileName.isEmpty()) {
                    JOptionPane.showMessageDialog(null, "Enter file path!", "Error", 0);
                } else {
                    File renameFile = new File(fileName);
                    if (renameFile.exists()) {
                        String newName = JOptionPane.showInputDialog("Enter new name:");

                        if (newName == null)
                            newName = "";

                        if (!newName.trim().isEmpty()) {
                            File newFile = new File(renameFile.getParent() + "\\" + newName);
                            renameFile.renameTo(newFile);
                            JOptionPane.showMessageDialog(null, "File renamed!", "Message", 1);
                        }
                    } else {
                        JOptionPane.showMessageDialog(null, "File don't find!", "Error!", 0);
                    }
                }
            }
        });
        buttonRename.setBounds(10, 104, 120, 23);
        contentPane.add(buttonRename);

        JButton buttonRead = new JButton("\u041F\u0440\u043E\u0447\u0438\u0442\u0430\u0442\u044C");
        buttonRead.setBounds(10, 138, 120, 23);
        contentPane.add(buttonRead);

        JButton buttonWrite = new JButton("\u0417\u0430\u043F\u0438\u0441\u0430\u0442\u044C");
        buttonWrite.setBounds(10, 172, 120, 23);
        contentPane.add(buttonWrite);

        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds(140, 39, 310, 244);
        contentPane.add(scrollPane);

        textArea = new JTextArea();
        scrollPane.setViewportView(textArea);


    }
}