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What is the class hierarchy of AWT?

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What is the class hierarchy of AWT?

There are four types of containers available in AWT: Window, Frame, Dialog and Panel. As shown in the hierarchy diagram above, Frame and Dialog are subclasses of Window class. Dialog: Dialog class has border and title.

Which class is at the top of the AWT hierarchy?

AWTEvent class is the highest-level class in the AWT event class hierarchy.

What are AWT classes in Java?

Java AWT components are platform-dependent i.e. components are displayed according to the view of operating system. AWT is heavyweight i.e. its components are using the resources of OS. The java. awt package provides classes for AWT api such as TextField, Label, TextArea, RadioButton, CheckBox, Choice, List etc.

What is AWT What are the various components in AWT?

AWT provides various components like button, label, checkbox, etc. used as objects inside a Java Program. AWT components use the resources of the operating system, i.e., they are platform-dependent, which means, component’s view can be changed according to the view of the operating system.

How many classes are there in AWT?

nine
The AWT provides nine basic non-container component classes from which a user interface may be constructed. (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.

Why AWT is used in Java?

Abstract Window Toolkit (AWT) is a set of application program interfaces ( API s) used by Java programmers to create graphical user interface ( GUI ) objects, such as buttons, scroll bars, and windows.

Is system a class in Java?

Among the facilities provided by the System class are standard input, standard output, and error output streams; access to externally defined properties and environment variables; a means of loading files and libraries; and a utility method for quickly copying a portion of an array.

What is the superclass for various AWT components?

MenuComponent
MenuComponent is an abstract class and is the superclass for all menu-related components.

What are the limitations of AWT in Java?

Disadvantages

  • The buttons of AWT does not support pictures.
  • It is heavyweight in nature.
  • Two very important components trees and tables are not present.
  • Extensibility is not possible as it is platform dependent.

Is Component A class of Java awt package?

Graphics classes of the java. awt package. The most important class for GUIs is Component, which represents a single graphical element in a GUI. Container is a kind of component that can contain other components.

Which of the following is class in Java awt package?

Defines an interface for classes that know how to layout Containers based on a layout constraints object. The super class of all menu related containers….Package java. awt.

Class Description
Container A generic Abstract Window Toolkit(AWT) container object is a component that can contain other AWT components.

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