import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.filechooser.FileNameExtensionFilter;

public class Text_Editor extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private JTextArea textArea;
    private JButton openButton, saveButton;

    public Text_Editor() {
        super("Text Editor");
        setSize(600, 400);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        textArea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(textArea);
        getContentPane().add(scrollPane, BorderLayout.CENTER);

        JPanel buttonPanel = new JPanel();
        getContentPane().add(buttonPanel, BorderLayout.PAGE_START);

        openButton = new JButton("Open");
        openButton.addActionListener(this);
        buttonPanel.add(openButton);

        saveButton = new JButton("Save");
        saveButton.addActionListener(this);
        buttonPanel.add(saveButton);

        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == openButton) {
            JFileChooser fileChooser = new JFileChooser();
            fileChooser.setFileFilter(new FileNameExtensionFilter("Text files", "txt"));
            int returnVal = fileChooser.showOpenDialog(this);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                try {
                    FileReader reader = new FileReader(fileChooser.getSelectedFile());
                    BufferedReader br = new BufferedReader(reader);
                    String line;
                    StringBuilder sb = new StringBuilder();
                    while ((line = br.readLine()) != null) {
                        sb.append(line).append("\n");
                    }
                    textArea.setText(sb.toString());
                    br.close();
                    reader.close();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        } else if (e.getSource() == saveButton) {
            JFileChooser fileChooser = new JFileChooser();
            fileChooser.setFileFilter(new FileNameExtensionFilter("Text files", "txt"));
            int returnVal = fileChooser.showSaveDialog(this);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                try {
                    FileWriter writer = new FileWriter(fileChooser.getSelectedFile());
                    writer.write(textArea.getText());
                    writer.close();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        }
    }

    public static void main(String[] args) {
        new Text_Editor();
    }

}