SystemVariable.setValue

Sets a value for the system variable, when the system variable supports this. Most system variables are read only.

The object types that can be used for value vary according to the field type as shown in the table below. The field type for each system variable can be obtained with method #getType(). In most cases, the mapping between object types and field types is handled automatically. Date and time fields require special consideration, particularly when calculations are performed.

Field Type	Supported Object Types
Boolean	Boolean: any value String: true values are "true", "Y", "Yes", "1", false values are "false", "N", "No", "0" Number: 1 is true, 0 is false
Character	String: any value Boolean: true becomes "Y", false becomes "N" Number: any value
Integer Number Currency	String: any numeric value Number: any value
Date	Date: both Java Date (java.util.Date) and Javascript Date objects can be used String: must be in the format specified in parameter Ufs.dateFormat in file UFSSetup.properties Number: represents the number of milliseconds since 1st January 1970
Datetime	Date: both Java Date (java.util.Date) and Javascript Date objects can be used String: Date followed by a space then Time. Date must be in the format specified in parameter Ufs.dateFormat in file UFSSetup.properties Time is in the format hh:mm:ss.ttt Number: represents the number of milliseconds since 1st January 1970
Time	Date: both Java Date (java.util.Date) and Javascript Date objects can be used String: must be in the format hh:mm:ss.ttt Number: represents the number of milliseconds since 1st January 1970
Object	Any object type can be used. Note that these objects become part of the form state and must therefore implement the Java Serializable interface.

Further documentation.