Need help to draw a graph from the output I get with my program please

Question

Hi all,
I please need help with this program, I need to display the amount of money over the years (which the user has to enter via the textfields supplied)
on a graph, I'm not sure what to do further with my program, but I have created a test with a System.out.println() method just to see if I get the correct output and it looks fine.
My question is, how do I get the input that was entered by the user (the initial deposit amount as well as the number of years) and using these to draw up the graph? (I used a button for the user to click after he/she has entered both the deposit and year values to draw the graph but I don't know how to get this to work?)
Please help me.
The output that I got looked liked this: (just for a test!) - basically this kind of output must be shown on the graph...
The initial deposit made was: 200.0
After year: 1        Amount is:  210.00
After year: 2        Amount is:  220.50
After year: 3        Amount is:  231.53
After year: 4        Amount is:  243.10
After year: 5        Amount is:  255.26
After year: 6        Amount is:  268.02
After year: 7        Amount is:  281.42
After year: 8        Amount is:  295.49
After year: 9        Amount is:  310.27
After year: 10        Amount is:  325.78
After year: 11        Amount is:  342.07
After year: 12        Amount is:  359.17
After year: 13        Amount is:  377.13
After year: 14        Amount is:  395.99
After year: 15        Amount is:  415.79
After year: 16        Amount is:  436.57
After year: 17        Amount is:  458.40And here is my code that Iv'e done so far:
import javax.swing.*;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.Math;
import java.text.DecimalFormat;
public class CompoundInterestProgram extends JFrame implements ActionListener {
    JLabel amountLabel = new JLabel("Please enter the initial deposit amount:");
    JTextField amountText = new JTextField(5);
    JLabel yearsLabel = new JLabel("Please enter the numbers of years:");
    JTextField yearstext = new JTextField(5);
    JButton drawButton = new JButton("Draw Graph");
    public CompoundInterestProgram() {
        super("Compound Interest Program");
        setSize(500, 500);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        amountText.addActionListener(this);
        yearstext.addActionListener(this);
        JPanel panel = new JPanel();
        panel.setBackground(Color.white);
        panel.add(amountLabel);
        amountLabel.setToolTipText("Range of deposit must be 20 - 200!");
        panel.add(amountText);
        panel.add(yearsLabel);
        yearsLabel.setToolTipText("Range of years must be 1 - 25!");
        panel.add(yearstext);
        panel.add(drawButton);
        add(panel);
        setVisible(true);
        public static void main(String[] args) {
             DecimalFormat dec2 = new DecimalFormat( "0.00" );
            CompoundInterestProgram cip1 = new CompoundInterestProgram();
            JFrame f = new JFrame();
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.getContentPane().add(new GraphPanel());
            f.setSize(500, 500);
            f.setLocation(200,200);
            f.setVisible(true);
            Account a = new Account(200);
            System.out.println("The initial deposit made was: " + a.getBalance() + "\n");
            for (int year = 1; year <= 17; year++) {
                  System.out.println("After year: " + year + "   \t" + "Amount is:  " + dec2.format(a.getBalance() + a.calcInterest(year)));
          @Override
          public void actionPerformed(ActionEvent arg0) {
               // TODO Auto-generated method stub
class Account {
    double balance = 0;
    double interest = 0.05;
    public Account() {
         balance = 0;
         interest = 0.05;
    public Account(int deposit) {
         balance = deposit;
         interest = 0.05;
    public double calcInterest(int year) {
           return  balance * Math.pow((1 + interest), year) - balance;
    public double getBalance() {
          return balance;
class GraphPanel extends JPanel {
    public GraphPanel() {
    public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setColor(Color.red);
}Your help would be much appreciated.
Thanks in advance.

Answer 1

watertownjordan wrote:
http://www.jgraph.com/jgraph.html
The above is also good.Sorry but you need to look a bit more closely at URLs that you cite. What the OP wants is a chart (as in X against Y) not a graph (as in links and nodes) . 'jgraph' deals with links and nodes.
The best free charting library that I know of is JFreeChart from www.jfree.org.