AddAction.java

package lab11;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.JTextField;

class AddAction implements ActionListener {
	ArrayList<Double> data;
	JTextField field;
	
	public AddAction(JTextField field, ArrayList<Double> data) {
		this.data = data;
		this.field = field;
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		this.data.add(Double.parseDouble(this.field.getText()));
	}
}

Okno.java

package lab11;

import java.io.File;
import java.util.ArrayList;

import javax.swing.*;

public class Okno extends JFrame {
	/**
	 * 
	 */
	private static final long serialVersionUID = 3875344705554977030L;
	JTextField Yy;
	JLabel LY;
	JButton dodaj, zapisz, rysuj;
	OknoGrafiki graf;
	ArrayList<Double> data = new ArrayList<Double>();

	public Okno() {
		setTitle("Labolatoria 11");
		setSize(700, 600);
		setLayout(null);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		setResizable(false);

		LY = new JLabel("Y:");
		LY.setBounds(100, 25, 20, 30);
		add(LY);

		Yy = new JTextField("");
		Yy.setBounds(130, 30, 40, 20);
		add(Yy);

		dodaj = new JButton("Dodaj");
		dodaj.setBounds(180, 30, 100, 20);
		dodaj.addActionListener(new AddAction(this.Yy, this.data));
		add(dodaj);

		zapisz = new JButton("Zapisz");
		zapisz.setBounds(300, 30, 100, 20);
		zapisz.addActionListener(new SaveAction(this.data));
		add(zapisz);

		rysuj = new JButton("Rysuj");
		rysuj.setBounds(420, 30, 100, 20);
		// rysuj.addActionListener(this);
		add(rysuj);

		graf = new OknoGrafiki();
		graf.setBounds(20, 60, 655, 500);
		// graf.Dr2P();
		add(graf);

	}

}

OknoGrafiki.java

package lab11;

import java.awt.*;
import java.awt.geom.Line2D;

import javax.swing.*;

public class OknoGrafiki extends JPanel {
	/**
	 * 
	 */
	private static final long serialVersionUID = -6678211622449395643L;

	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
		
		/*setBackground(Color.WHITE);
		g.setColor(Color.BLACK);
		g.drawLine(20, 10, 20, 470); // os y

		// podzialki na osi (opcjonalne, na labkach pewnie nie)
		g.drawLine(10, 30, 30, 30);
		g.drawLine(10, 50, 30, 50);
		g.drawLine(10, 70, 30, 70);
		g.drawLine(10, 90, 30, 90);
		g.drawLine(10, 110, 30, 110);
		g.drawLine(10, 130, 30, 130);
		g.drawLine(10, 150, 30, 150);
		g.drawLine(10, 170, 30, 170);
		g.drawLine(10, 190, 30, 190);
		g.drawLine(10, 210, 30, 210);
		g.drawLine(10, 230, 30, 230);
		g.drawLine(10, 250, 30, 250);
		g.drawLine(10, 270, 30, 270);
		g.drawLine(10, 290, 30, 290);
		g.drawLine(10, 310, 30, 310);
		g.drawLine(10, 330, 30, 330);
		g.drawLine(10, 350, 30, 350);
		g.drawLine(10, 370, 30, 370);
		g.drawLine(10, 390, 30, 390);
		g.drawLine(10, 410, 30, 410);
		g.drawLine(10, 430, 30, 430);
		g.drawLine(10, 450, 30, 450);

		// strzalka na osi y
		g.drawLine(20, 10, 10, 20);
		g.drawLine(20, 10, 30, 20);

		// os x
		g.drawLine(10, 250, 620, 250);

		// podzialki osi x (opcjonalne, na labkach pewnie nie)

		g.drawLine(40, 240, 40, 260);
		g.drawLine(60, 240, 60, 260);
		g.drawLine(80, 240, 80, 260);
		g.drawLine(100, 240, 100, 260);
		g.drawLine(120, 240, 120, 260);
		g.drawLine(140, 240, 140, 260);
		g.drawLine(160, 240, 160, 260);
		g.drawLine(180, 240, 180, 260);
		g.drawLine(200, 240, 200, 260);
		g.drawLine(220, 240, 220, 260);
		g.drawLine(240, 240, 240, 260);
		g.drawLine(260, 240, 260, 260);
		g.drawLine(280, 240, 280, 260);
		g.drawLine(300, 240, 300, 260);
		g.drawLine(320, 240, 320, 260);
		g.drawLine(340, 240, 340, 260);
		g.drawLine(360, 240, 360, 260);
		g.drawLine(380, 240, 380, 260);
		g.drawLine(400, 240, 400, 260);
		g.drawLine(420, 240, 420, 260);
		g.drawLine(440, 240, 440, 260);
		g.drawLine(460, 240, 460, 260);
		g.drawLine(480, 240, 480, 260);
		g.drawLine(500, 240, 500, 260);
		g.drawLine(520, 240, 520, 260);
		g.drawLine(540, 240, 540, 260);
		g.drawLine(560, 240, 560, 260);
		g.drawLine(580, 240, 580, 260);
		g.drawLine(600, 240, 600, 260); */
		g2.draw(new Line2D.Double(new Point(300, 400), new Point(20, 250)));
	}
}

SaveAction.java

package lab11;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

class SaveAction implements ActionListener {
	ArrayList<Double> data = new ArrayList<Double>();

	public SaveAction(ArrayList<Double> data) {
		this.data = data;
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		JFileChooser fc = new JFileChooser();

		if (fc.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
			try(FileWriter fw = new FileWriter(fc.getSelectedFile())){
				for(Double row: data){
					fw.write(row.toString()+"\n");
				};
			} catch (IOException e1) {
				JOptionPane.showMessageDialog(null,
						"Bładz podczas pracy na pliku!", "",
						JOptionPane.ERROR_MESSAGE);
			}

			JOptionPane.showMessageDialog(null,
					"Zapisywanie przebiogło pomyślnie", "",
					JOptionPane.INFORMATION_MESSAGE);
		}
		this.data.clear();
	}
}

test.java

package lab11;

public class test {

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

}