Bar chart in Dashboard | Create Bar Chart
A Bar Chart needs a minimum of two columns. The first column is the character based column (it could be a numeric but it forms the Axis column either X or Y). The second column is the numeric value column which represents the bars in the chart
NOTE: You can have more than two columns but all of the remaining columns should be numeric
(Complete Instructions) How to create Bar Chart in Dashboard
Tags: bar chart, jfreechart, dashboards, change bar colors