How to create a pie chart in Jasper Reports?

Step1 : create a table and populate required records.

SQL> CREATE TABLE results
( party_name varchar2(30),
scored_percentage number );

SQL> INSERT INTO results VALUES ( 'UNP', 25);

SQL> INSERT INTO results VALUES ( UPFA, 60);

SQL> INSERT INTO results VALUES ( 'JVP', 5);

SQL> INSERT INTO results VALUES ( 'OTHER', 10);

Step2 : Open a new report in Jasper Report.

Step3 : Write the follwing sql query in the "report query"
select *
from results

Step4 : Drag and drop the "chart" on the summary area (i.e just after
the page footer ) and select the pie chart from the chart types.

Step5 : Right click on the chart and select "Chart Data"
set the Key expression as $F{PARTY_NAME}
Value expression as $F{SCORED_PERCENTAGE}
Label expression as
$F{PARTY_NAME}+" "+$F{SCORED_PERCENTAGE}+"%"


Step6 : Now You are done. and you will see the report preview as


Note : I've used iReport 3.1.4 here.