Fields¶

In a report, there are three groups of objects that can store values:

• Fields

• Parameters

• Variables

Jaspersoft Studio uses these objects in data source queries. To use these objects in a report, they must be declared with a discrete type that corresponds to a Java class, such as String or Double. After they have been declared in a report design, the objects can be modified or updated during the report generation process.

This chapter contains the following sections:

• Understanding Fields

• Registration of Fields from a SQL Query

• Registration of JavaBean Fields

• Fields and Textfields

• Data Centric Exporters