I would like to make a graph like this one:

http://www.cis.ksu.edu/~schmidt/CIS200/gifV6html/Ch5/bargraph.gif

This is what I have, but I am pretty lost on how to get any further.
setBar1 - setBar6 are supposed to be each of the bars and I guess I am
supposed to use setAxes in setBar but I am not sure how.

hope someone can help

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

class BarGraphWriter extends JPanel
{ private int width;
 private int height;
 private String sentence1 = "";
 private String sentence2 = "";
 private String sentence3 = "";
 private String sentence4 = "";
 private String sentence5 = "";
 private String sentence6 = "";
 private int x_position;
 private int y_position;

public BarGraphWriter(int w, int h)
 { width = w;
   height = h;
   x_position = width / 5;
   y_position = height / 2;
   JFrame my_frame = new JFrame();
   my_frame.getContentPane().add(this);
   my_frame.setTitle("Graph");
   my_frame.setSize(width, height);
   my_frame.setVisible(true);
 }

public void paintComponent(Graphics g)
 { super.paintComponent(g);
   g.setColor(Color.red);
   g.drawString(sentence1, x_position, y_position);
   g.drawString(sentence2, x_position, y_position);
   g.drawString(sentence3, x_position, y_position);
   g.drawString(sentence4, x_position, y_position);
   g.drawString(sentence5, x_position, y_position);
   g.drawString(sentence6, x_position, y_position);
 }

public void setAxes(int x_pos, int y_pos, String top_label, int y_height)
{
}

public void setBar1(String label, int height, Color c)
{
}

public void setBar2(String label, int height, Color c)
{
}

public void setBar3(String label, int height, Color c)
{
}

public void setBar4(String label, int height, Color c)
{
}

public void setBar5(String label, int height, Color c)
{
}

public void setBar6(String label, int height, Color c)
{
}

}
public class TestGraph
{ public static void main(String[] a)
 { BarGraphWriter e = new BarGraphWriter();
   e.setTitle("Days in first four months of the year");
   e.setAxes(20, 120, "30", 90);

   int scale_factor = 3;
   e.setBar1("Jan", 31 * scale_factor, Color.red);
   e.setBar2("Feb", 28 * scale_factor, Color.white);
   e.setBar3("Mar", 31 * scale_factor, Color.blue);
   e.setBar4("Apr", 30 * scale_factor, Color.red);
 }
}