The given code snippet can create a 3D Bar Chart. The given Bar Chart compares 2 aspects of each customer. The generated chart will have two bars for each customer for both Profit1 and Profit 2 (see the dataset).
Profit 1 can can be total annual profit and Profit 2 can be profit for a particular period like monthly or weekly profit. Please find the sample image created using this code.
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.setValue(6, "Profit1", "Jane");
dataset.setValue(3, "Profit2", "Jane");
dataset.setValue(7, "Profit1", "Tom");
dataset.setValue(10, "Profit2", "Tom");
dataset.setValue(8, "Profit1", "Jill");
dataset.setValue(8, "Profit2", "Jill");
dataset.setValue(5, "Profit1", "John");
dataset.setValue(6, "Profit2", "John");
dataset.setValue(12, "Profit1", "Fred");
dataset.setValue(5, "Profit2", "Fred");
// Profit1, Profit2 represent the row keys
// Jane, Tom, Jill, etc. represent the column keys
JFreeChart chart = ChartFactory.createBarChart3D(
"Comparison between Salesman", // Chart name
"Salesman", // X axis label
"Value ($)", // Y axis value
dataset, // data set
PlotOrientation.VERTICAL,
true, true, false);
// Creating a JPEG image
try
{
ChartUtilities.saveChartAsJPEG(new File("myChart.jpg"), chart, 500, 300);
}
catch (IOException e)
{
System.err.println("Problem occurred creating chart.");
}
Image generated:

Other useful links:
Creating Time Series charts using JFreeChart
Creating Pie Chart using JFreeChart (Using plot)
Creating Pie Chart using JFreeChart
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