Typical (string) length

The typicalLength() element indicates the typical length of a string property. It is ignored for properties of other types.

The information is intended as a hint to the UI to determine the space that should be given to render a particular string property.

For example:

import lombok.Getter;
import lombok.Setter;

public class Customer {

    @javax.jdo.annotations.Column(length=30)
    @ParameterLayout(typicalLength=20)
    @Getter @Setter
    private String firstName;

    // ...
}
All that said, the Web UI (Wicket viewer) uses the maximum space available for all fields, so in effect ignores this element.