// Make sure the ChartFactory binary jar is in your classpath
import org.corpstein.image.*;
public class Test
{
  public static void main(String args[])
  {
    try
    {
      ChartFactory factory = ChartFactory.getInstance();  // Get a ChartFactory object
      ChartData data = new ChartData();                   // Create a ChartData object
      data.setTitle("My Chart");                          // Set the chart title
      data.addPoint("foo", 1);                            // Add 2 values with labels
      data.addPoint("bar", 2);
      // Create the image and write it to a file
      factory.writeImage(factory.createBarChart(data), "MyChart.png"); 
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
  }
}

	public static final int KEY_TYPE_BAR_COLOR_ASSOCIATION = 0;
	public static final int KEY_TYPE_DIAGONAL_BAR_LABELS   = 1;
	public static final int KEY_TYPE_HORIZONTAL_BAR_LABELS = 2;

	public static final int Z_INDEX_BACKGROUND = 10;
	public static final int Z_INDEX_BORDER     = 20;
	public static final int Z_INDEX_BACKDROP   = 30;
	public static final int Z_INDEX_SCALE      = 40;
	public static final int Z_INDEX_BARS       = 50;
	public static final int Z_INDEX_SLICES     = 60;
	public static final int Z_INDEX_LINES      = 70;
	public static final int Z_INDEX_AXIS_LABEL = 80;
	public static final int Z_INDEX_KEY        = 90;
	public static final int Z_INDEX_TITLE      = 100;

	ImageLayer layer = new ImageLayer("Watermark.png");  
	// Set the location somewhere in the middle of the chart
	layer.setX(160);    
	layer.setY(130);
	layer.setZ(ChartMetrics.Z_INDEX_SCALE + 1);  // place it under the bars

	ChartStyle style = new ChartStyle();  // define a custom style
	style.addLayer(layer);  // Add the layer to the chart
	ChartFactory factory = ChartFactory.getInstance();  
	Image image = factory.createBarChart(data, style);  // Create the chart
	factory.writeImage(image, "myChart.png");  // Save the image to a file

	TextLayer layer = new TextLayer("Generated 24 April 2005");  
	// Set the font to blue 12pt bold SansSerif
	layer.setFont(new Font("SansSerif"), Font.BOLD, 12);
	layer.setFontColor(Color.BLUE);
	// Set the location in the bottom left corner
	layer.setX(10);    
	layer.setY(460);
	layer.setZ(ChartMetrics.Z_INDEX_TITLE + 1);  // place it on top of everything

	ChartStyle style = new ChartStyle();  // define a custom style
	style.addLayer(layer);  // Add the layer to the chart
	ChartFactory factory = ChartFactory.getInstance();  
	Image image = factory.createBarChart(data, style);  // Create the chart
	factory.writeImage(image, "myChart.png");  // Save the image to a file

import org.corpstein.image.*;
public class Smiley extends Layer
{
	public Smiley(ChartStyle style)
	{
		this.style = style;
		setHeight(20);
		setWidth(20);
		setZ(ChartMetrics.Z_INDEX_TITLE + 1);  // topmost layer
	}

	public void draw(Graphics g)
	{
		super.draw(g);
		g.setColor(Color.BLUE);
		g.drawOval(0,  0, 19, 19);  // head
		g.drawLine(8,  5,  8,  7);  // left eye
		g.drawLine(11, 5, 11,  7);  // right eye
		g.drawArc(0, -5, 19, 19, 230, 80); // smile
	}
}

public void createChart() throws IOException
{
  ChartStyle style = new ChartStyle();  // used to customize the colors

  style.setColor(ChartStyle.COLOR_LABEL, Color.WHITE); // key text, axis labels, title
  style.setColor(ChartStyle.COLOR_SHADOW, Color.GRAY); // shadow under title text
  style.setColor(ChartStyle.COLOR_WALL, new Color(0.8f, 0.8f, 1.0f)); // light blue backdrop
  style.setColor(ChartStyle.COLOR_EDGE, Color.BLACK); // outline of bars, key, scale, etc.   
  style.setColor
  (
    ChartStyle.COLOR_BACKGROUND,  // Background of the entire chart image
    new GradientPaint  // Use a paint that fades from one color to another
    (
      0, 0,       // Start in the top left
      Color.BLUE, // with blue
      640, 480,                         // Go to the bottom right
      new Color(1.0f, 0.0f, 0.0f, 0.9f) // with 90% opaque Red
    )
  );
		
  style.setBarColor(Color.WHITE); // all bars are white
  style.setBarColor(0, Color.YELLOW); // the first bar is now yellow
  style.setBarColor(1, 1.0f, 0.0f, 0.0f); // 2nd bar is red
  style.setBarColor(2, 0.0f, 1.0f, 0.0f, 0.3f); // 3rd bar is green and very transparent
	
  ChartData data = new ChartData();
  data.setTitle("My Chart");
  data.addLabel("one"); // first bar
  data.addValue(1);
  data.addPoint("two", 2); // second bar
  data.addPoint("three", 3);
  data.addPoint("four", 4);  // color still white, as are all subsequent bars

  ChartFactory factory = ChartFactory.getInstance();
  Image image = factory.createBarChart(data, style); // pass data and style
  factory.writeImage(image, "MyChart.png"); // save the image to a file
}