PDF4Java Reference Documentation
com.o2sol.pdf4java.forms Package / PDFField Class / setIsRequired Method
True if the field shall have a value at the time it is exported by a submit-form action
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    setIsRequired Method
    In This Topic
    Sets a value indicating whether the field is required.
    Syntax
    public void setIsRequired( 
       boolean value
    )

    Parameters

    value
    True if the field shall have a value at the time it is exported by a submit-form action
    See Also