Java dodanie JMenu do programu

Question

//ConvexHull.java

package convexHull1;

import java.awt.Canvas;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.swing.JFrame;

public class ConvexHull extends Canvas implements MouseListener{
	private static int countA;
	private static int countB;
	private static ArrayList<Point> A = new ArrayList<Point>();
	private static ArrayList<Point> B = new ArrayList<Point>();
	private static Graphics gDC;
	public ConvexHull() {
		// TODO Auto-generated constructor stub
		countA = 0;
		countB = 0;
		addMouseListener((MouseListener) this);
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		JFrame jf = new JFrame("Convex Hull");
		ConvexHull convexHull = new ConvexHull();
		jf.setSize(800, 600);
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.add(convexHull);
	}

	public void paint(Graphics gDC)
	{
		PrintWriter out;
		String str = new String();
		try {
			out = new PrintWriter(new BufferedWriter(new FileWriter("hulloutput.txt",true)));
		str = "";
		for(int i = 0;i < countA;i++)
		{
			gDC.fillOval(A.get(i).getX()-5, A.get(i).getY()-5, 10, 10);
			str += A.get(i).toString() + " ";
		}
		out.println("All points");
		out.println(str);
		out.println("Points on the hull");
		str = "";
		for(int i = 0;i < countB;i++)
		{
			gDC.drawLine(B.get(i).getX(),B.get(i).getY(), B.get((i+1)%countB).getX(),B.get((i+1)%countB).getY());
			System.out.println(B.get(i).getX() + " "+ B.get(i).getY());
			str += B.get(i).toString() + " ";
		}
		out.println(str);
		System.out.println();
		out.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	@Override
	public void mouseClicked(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void mouseEntered(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void mouseExited(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void mousePressed(MouseEvent e) {
		// TODO Auto-generated method stub
		int x = e.getX();
		int y = e.getY();
		Point point = new Point(x,y);
		A.add(point);
		countA++;
		while(!B.isEmpty())
			B.remove(B.get(0));
		//Jarvis.Solve(A, B);
		//Graham.Solve(A, B);
		//QuickHull.Solve(A,B);
		countB = B.size();
		repaint();
	}

	@Override
	public void mouseReleased(MouseEvent e) {
		// TODO Auto-generated method stub
		
	}

}

Jak dopisać do tego programu JMenu a następnie reakcję na zdarzenia

takie jak zapis danych do pliku , wybór algorytmu itp