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A list box is a graphical control element that allows the user to select one or more items from a list contained within a static, multiple line text box. The user clicks inside the box on an item to select it, sometimes in combination with the ⇧ Shift or Ctrl in order to make multiple selections. "Control-clicking" an item that has already ...
List box – a graphical control element that allows the user to select one or more items from a list contained within a static, multiple line text box. Spinner – value input control which has small up and down buttons to step through a range of values; Drop-down list – A list of items from which to select. The list normally only displays ...
Drop-down list. A drop-down list (abbreviated drop-down, or DDL; [1] also known as a drop-down menu, drop menu, pull-down list, picklist) is a graphical control element, similar to a list box, that allows the user to choose one value from a list either by clicking or hovering over the menu. When a drop-down list is inactive, it displays a ...
Boxing (computer programming) In computer science, boxing (a.k.a. wrapping) is the transformation of placing a primitive type within an object so that the value can be used as a reference. Unboxing is the reverse transformation of extracting the primitive value from its wrapper object. Autoboxing is the term for automatically applying boxing ...
In object-oriented programming, the factory method pattern is a design pattern that uses factory methods to deal with the problem of creating objects without having to specify their exact classes. Rather than by calling a constructor, this is accomplished by invoking a factory method to create an object. Factory methods can be specified in an ...
Observer pattern. In software design and engineering, the observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods. It is often used for implementing distributed event ...
A generic combo box. A combo box is a commonly used graphical user interface widget (or control). Traditionally, it is a combination of a drop-down list or list box and a single-line editable textbox, allowing the user to either type a value directly or select a value from the list. The term "combo box" is sometimes used to mean "drop-down list ...
Vaadin Flow's Java API includes classes such as TextField, Button, ComboBox, Grid, and many others that can be configured, styled, and added into layout objects instances of classes such as VerticalLayout, HorizontalLayout, SplitLayout, and others. Behaviour is implemented by adding listeners to events such as clicks, input value changes, and ...