Java Component Class Hierarchy

AWT Hierarchy. The Java AWT Application Windowing Toolkit contains the fundamental classes used for constructing GUIs. The abstract Component class is the base class for the AWT. Many other AWT classes are derived from it. We will not look at most of these classes. Here is a diagram that shows how the classes of the AWT and Swing fit

A component is an object having a graphical representation that can be displayed on the screen and that can interact with the user. Examples of components are the buttons, checkboxes, and scrollbars of a typical graphical user interface. The Component class is the abstract superclass of the nonmenu-related Abstract Window Toolkit components. Class Component can also be extended directly to

AWT Component Hierarchy An Overview. The AWT Component Hierarchy is a class structure that organizes all AWT components into a tree-like structure. It is based on Java's object-oriented principles, where components are instances of classes that extend from a common ancestor, allowing them to share behavior and interact with each other in a predictable way.

Java AWT Java AWT Abstract Window Toolkit is an API to develop GUI or window-based applications 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.

Overview of the Java UI The Component Hierarchy The example program see above has several levels in its Component hierarchy. The parent of each level is a Container which inherits from Component. Converter inherits the add method from the Container class Converter extends Applet, which extends Panel

Java AWT Hierarchy. The hierarchy of Java AWT classes are given below. Components. All the elements like the button, text fields, scroll bars, etc. are called components. In Java AWT, there are classes for each component as shown in above diagram. In order to place every component in a particular position on a screen, we need to add them to a

The Swing class that defines a window with a title bar and border. JComponent A base class for Swing components such as JPanel, JButton, JLabel, and JTextField. JPanel The Swing class that defines a panel, which is used to hold other components. JLabel The Swing class that defines a label. JTextField The Swing class that defines a text field

Various classes in java.awt package are arranged in a hierarchy as shown below Component and Container . Except for menus, most of the GUI components are inherited from the Component class. Container. Container is a sub class of the Component class which can be used to hold other components. A Container object can hold other Containers also.

The getComponentType method of java.lang.Class class is used to get the Class representing the component type of an array, if this class represents one. Else it returns null.Syntax public Class getComponentType Parameter This method does not accept any parameter.Return Value This method retur

The hierarchy of Java AWT classes are given below, all the classes are available in java.awt package. Component class. Component class is at the top of AWT hierarchy. It is an abstract class that encapsulates all the attributes of visual component. A component object is responsible for remembering the current foreground and background colors