PieGraph

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

public class PieGraph2 extends JFrame {
    public PieGraph2(){
        super("Pie Graph");
        setSize(700, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        PiePane p = new PiePane();
        p.addSlice(60F, Color.yellow);
        p.addSlice(100F, Color.magenta);
        p.addSlice(100F, Color.cyan);
        p.addSlice(80F, Color.red);
        p.addSlice(20F, Color.blue);
        add(p);
        setVisible(true);
    }

    public static void main(String[] arguments){
        PieGraph2 eric = new PieGraph2();
    }
}

class PiePane extends JPanel {
    ArrayList<Color> colors;
    ArrayList<Float> angles;
    public PiePane(){
        colors = new ArrayList<>();
        angles = new ArrayList<>();
    }
    public void addSlice(float degrees, Color color){
        colors.add(color);
        angles.add(degrees);
    }
    public void paintComponent(Graphics comp){
        Graphics2D comp2D = (Graphics2D)comp;
        int count = 0;
        for(int i = 0; i < angles.size(); i++){
            comp2D.setColor(colors.get(i));
            System.out.println("count: " + count + ", new count: " + (count + angles.get(i)));
            comp2D.fill(new Arc2D.Float(200F, 200F, 300F, 300F, count, angles.get(i), Arc2D.PIE));
            count += angles.get(i);
        }
    }
}