Create Chart/Graph Using collection

[jigar.prajapati]

Currently i m new at ireport. i want to create chart/graph using Java.util.collection in which pass through java code.
Previously i create table with data using collection but in chart i cant find any reference.
Can u please provide me sugegstion to create chart using collection .
Or
how can i use table dataset to create chart/graph ?

 

[joseng62]

In the chart, you can usually select a dataset to run, which default is set to Report main dataset. 
But if you create another dataset and selected it in the drop down in the chart properties. You can then select
data source Expression and select "Use a DataSource expression"
Then use the JRDatasource.