import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class Window  extends JFrame implements ActionListener{
    private JPanel p1=new JPanel();
     private JPanel p2=new JPanel();
    private JButton b1=new JButton("OPEN");
    private JButton b2=new JButton("SAVE");
    private JTextArea ta=new JTextArea();
    private BufferedReader b;

    public Window(FileReader f){

    super("My window");
    this.b=new BufferedReader(f);
    this.setSize(600,600);
    this.setLayout(new GridLayout(2,1));
    this.setVisible(true);
    this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
    this.p1.setSize(300,300);
this.p1.setLayout(new GridLayout(1,2));
this.p1.add(this.b1);
this.p1.add(this.b2);
this.add(this.p1);
this.p2.setSize(300,300);
//this.ta.setHorizontalAlignment(JTextArea.CENTER);
this.p2.setLayout(new GridLayout(1,1));
this.p2.add(this.ta);
this.add(this.p2);
b1.addActionListener(this);
b2.addActionListener(this);

    }
    public void actionPerformed(ActionEvent e){
        String line="";
        if(e.getSource()==b1){
            while(line!=null){
                try{


               line=this.b.readLine();
                this.ta.append(line);
                this.ta.append("\n");
                }
                catch(IOException exception){
                   exception.printStackTrace();
                }
            }

        }
        if(e.getSource()==b2){
            try{
               FileWriter fw=new FileWriter("C:\\Users\\user.LAB2PC1\\Desktop\\test.txt");
               BufferedWriter bw=new BufferedWriter(fw);
               String data=this.ta.getText();
               bw.write(data);
               bw.close();
               fw.close();

            }
            catch(IOException ex1){
                ex1.printStackTrace();
            }

        }

    }
    public static void main(String[] args){
        try{
        FileReader f=new FileReader("C:\\Users\\user.LAB2PC1\\Desktop\\test.txt");
        Window m=new Window(f);}
        catch(IOException e2){
            e2.printStackTrace();
        }
    }
}