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 * and open the template in the editor.
 */
package javaapplication34;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;

public class MySuperFrame extends JFrame implements ActionListener {

    final String SAVE_JBUTTON = "save";
    final String OPEN_JBUTTON = "open";
    private JPanel panel;
    private JButton save;
    private JButton open;
    private JTextArea textArea;

    public MySuperFrame() {
        super("Super Frame!!!");
        this.setSize(620, 480);
        this.panel = new JPanel();
        this.save = new JButton("Save");
        this.open = new JButton("Open");
        this.save.setActionCommand("save");
        this.textArea = new JTextArea();
        this.panel.setBackground(Color.black);
        this.panel.setLayout(new BorderLayout());
        JPanel buttons = new JPanel();
        buttons.setLayout(new GridLayout(1, 2));
        buttons.add(save);
        buttons.add(open);
        final String fileName = "tmp.txt";
        //this.save.addActionListener(this);
        //this.open.addActionListener(this);
        this.open.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //open.setBackground(Color.red);
                File f = new File(fileName);
                if (f.exists()) {
                    try {
                        FileReader fr = new FileReader(f);
                        BufferedReader br = new BufferedReader(fr);
                        String lines = "";
                        String line = "";
                        while ((line = br.readLine()) != null) {
                            lines += line + "\n";
                        }
                        textArea.setText(lines);
                        br.close();
                    } catch (Exception ex) {
                        JOptionPane.showMessageDialog(null, "File not found");
                    }
                } else {
                    JOptionPane.showMessageDialog(null, "File not found");
                }

            }
        });

        this.save.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                File f = new File(fileName);
                try {
                    FileWriter fw = new FileWriter(f);
                    BufferedWriter bw = new BufferedWriter(fw);
                    bw.write(textArea.getText());
                    bw.flush();
                    bw.close();
                } catch (Exception ex) {

                    JOptionPane.showMessageDialog(null, ex.toString());
                }
            }
        });
        this.open.setActionCommand("open");
        //Observer ob = new Observer();
        //this.save.addActionListener(ob);
        this.panel.add(this.textArea, BorderLayout.CENTER);
        this.panel.add(buttons, BorderLayout.NORTH);

        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.add(this.panel);

    }

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

    @Override
    public void actionPerformed(ActionEvent e) {
        switch (e.getActionCommand()) {
            case SAVE_JBUTTON: {
                JButton btn = (JButton) e.getSource();
                btn.setText("You clicked me");
                this.textArea.setText("Hello world!");
                break;
            }
            case OPEN_JBUTTON: {
                JButton btn = (JButton) e.getSource();
                btn.setText("Hello world!");
                this.textArea.setText("You clicked me");
                break;
            }
            default:
        }

    }
}