import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*;
import java.awt.Image;
import java.awt.image.*;
import java.awt.event.*;
import java.io.*;
import javax.imageio.*;

class ImgArea extends Canvas {
    BufferedImage bi;
    File f = null;

    public void paint(Graphics g) {
        Graphics2D g2d = (Graphics2D)g;
        g2d.drawImage(bi, 0, 0, null);
    }

    public void readImage(String path) throws IOException {
        f = new File(path);
        bi = ImageIO.read(f);
    }

    public void saveImage(String path) throws IOException {
        f = new File(path);
        ImageIO.write(bi, "jpg", f);
    }
}

public class Biometry extends JFrame implements ActionListener, ChangeListener {
    JMenuBar menuBar;
    JMenu file, edit;
    JMenuItem open, save, exit, zoom, changePixel, histograms;
    JSlider sZoom;
    float valueZoom;
    int width, height;
    BufferedImage image = null;
    File f = null;
    ImgArea ia;

    public Biometry() {
        setTitle("Biometry");
        ia = new ImgArea();
        Container cont = getContentPane();
        cont.add(ia, BorderLayout.CENTER);
        setExtendedState(this.getExtendedState()|this.MAXIMIZED_BOTH);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(null);

        menuBar = new JMenuBar();
        setJMenuBar(menuBar);

        file = new JMenu("File");
        file.setMnemonic(KeyEvent.VK_F);
        menuBar.add(file);
        open = new JMenuItem("Open", 'O');
        file.add(open);
        open.addActionListener(this);
        save = new JMenuItem("Save", 'S');
        file.add(save);
        save.addActionListener(this);
        exit = new JMenuItem("Exit", 'X');
        file.add(exit);
        exit.addActionListener(this);

        edit = new JMenu("Edit");
        edit.setMnemonic(KeyEvent.VK_E);
        menuBar.add(edit);
        zoom = new JMenuItem("Zoom", 'Z');
        edit.add(zoom);
        zoom.addActionListener(this);
        changePixel = new JMenuItem("Change pixel color", 'C');
        edit.add(changePixel);
        histograms = new JMenuItem("Histograms", 'H');
        edit.add(histograms);
        ia.requestFocus();
    }

    public void sliderZoom() {
        sZoom = new JSlider(0, 10, 0);
        sZoom.setBounds(10, 10, 100, 20);
        sZoom.setMajorTickSpacing(1);
        sZoom.setPaintTicks(true);
        sZoom.addChangeListener(this);
        add(sZoom);
    }

    public void actionPerformed(ActionEvent e) {
        Object source = e.getSource();
        if (source==open) {
            JFileChooser fc = new JFileChooser();
            if (fc.showOpenDialog(null)==JFileChooser.APPROVE_OPTION) {
                File file = fc.getSelectedFile();
                try {
                    ia.readImage(file.getAbsolutePath());
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
        else if (source==save) {
            JFileChooser fc = new JFileChooser();
            if (fc.showSaveDialog(null)==JFileChooser.APPROVE_OPTION) {
                File file = fc.getSelectedFile();
                try {
                    ia.saveImage(file.getAbsolutePath());
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
        else if (source==exit) {
            int answer = JOptionPane.showConfirmDialog(null, "You want exit?", "Question", JOptionPane.YES_NO_OPTION);
            if (answer == JOptionPane.YES_OPTION)
                dispose();
        }
        else if (source==zoom) {
            sliderZoom();
        }
    }

    public void stateChanged(ChangeEvent e) {
        valueZoom = sZoom.getValue();
    }

    public static void main(String[] args) {
        Biometry window = new Biometry();
        window.setVisible(true);
    }
}