Java Graphics Programming

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Java

Write a program that accepts one command line argument, the name of a file containing data to be drawn as a pie chart, and draws the pie chart in a window.
• Sample data file, birds.txt, contains the one-word categories of birds, and the number of each kind.
swallow 10
magpie 5
fairywren 7
osprey 2
fantail 3
• The pie chart must use a different colour for each pie segment, and display a legend that shows the labels and the percentage for each.
• Your program should support up to 10 categories.

[Added from comment]

This is what I have so far...

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

public class Pie4 {

    public static void main(String[] args) {
        JFrame f = new JFrame("Pie chart");
        f.setSize(600, 350);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new PieChart());
        f.setVisible(true);	
    }	
}

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

public class PieChart
extends JComponent {
    public void paintComponent(Graphics g) {

        Graphics2D g2 = (Graphics2D) g.create();
        Graphics2D g3 = (Graphics2D) g.create();
        g3.setColor(Color.BLACK);
        g2.setColor(Color.BLUE);
        //for (int i = 0; i < 5; i = i + 1) {
            //g2.fillRect(230, 20 * i + 50 , 20, 20);	
            //g3.drawString("swallow", 255, 20 * i + 65);	
            //g3.drawString("37.0%", 385, 20 * i + 65);	
        //}
        g2.fillArc(50, 50, 150, 150, 0, 360);	
    }
}

I can't figure out the rest