The classes that extend the Container class are known as containers such as Frame, Dialog, and Panel as shown in the hierarchy. What are the 4 types of inheritance?įollowing is AWT hierarchy: The Container is one of the components in AWT that contains other components like buttons, text fields, labels, etc. What are the different types of controls in AWT?ĪWT supports the following types of controls: Labels, push buttons, check boxes, check box groups, lists, scroll bars, text fields etc. Checkbox class, its underlying Operating System will generate a checkbox for us. For instance, When we create an object of java. AWT features include: A set of native user interface components.ĪWT is considered to be heavy-weight because its components are dependent on the underlying Operating System. The Abstract Window Toolkit (AWT) supports Graphical User Interface (GUI) programming. class is used to create a labeled button. Container in Java AWT is a component that is used to hold other components such as text fields, buttons, etc. (Of course, new component classes may be derived from any of these or from class Component itself.) These nine classes are class Button, Canvas, Checkbox, Choice, Label, List, Scrollbar, TextArea, and TextField. The AWT provides nine basic non-container component classes from which a user interface may be constructed. layout managers, for flexible window layouts that don’t depend on a particular window size or screen resolution.graphics and imaging tools, including shape, color, and font classes.a rich set of user interface components.The new class that is created is known as subclass (child or derived class) and the existing class from where the child class is derived is known as superclass (parent or base class). Inheritance is one of the key features of OOP that allows us to create a new class from an existing class. The component class stands at the top of the AWT hierarchy, is an abstract class that contains all the properties of the component visible on the screen. Which class is at the top of the AWT hierarchy? awt package provides classes for AWT API such as TextField, Label, TextArea, RadioButton, CheckBox, Choice, List etc. its components are using the resources of underlying operating system (OS). What is AWT and represent hierarchy of AWT?ĪWT is heavy weight i.e.
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