Callbacks are invoked by the event dispatch thread. Event dispatch thread blocks processing of other events as long as call back method executes. Read More

AWT stands for Abstract Window Toolkit. AWT enables programmers to develop Java applications with GUI components, such as windows, and buttons. The Java Virtual Machine ( JVM) is responsible for translating the AWT calls into the appropriate ... Read More

Swing is a GUI toolkit for Java. It is one part of the Java Foundation Classes (JFC). Swing includes graphical user interface (GUI) widgets such as text boxes, buttons, split-panes, and tables. Swing widgets provide more sophisticated GUI... Read More

Event-delegation model has two advantages over event-inheritance model. a)Event delegation model enables event handling by objects other than the ones that generate the events. This allows a clean separation between a component's design and its... Read More

An event handler is a part of a computer program created to tell the program how to act in response to a specific event. Read More

A layout manager is an object that is used to organize components in a container. Read More

The window, Frame and Dialog classes use a border layout as their default layout. Read More

The preferred size of a component is the minimum component size that will allow the component to display normally. Read More

The setLayout() method is used to specify a container's layout. Read More

The Panel and Applet classes use the FlowLayout as their default layout. Read More

setBounds Method of the Component class is used to set the position and size of a component. Read More

JFC stands for Java Foundation Classes. The Java Foundation Classes (JFC) are a set of Java class libraries provided as part of Java 2 Platform, Standard Edition (J2SE) to support building graphics user interface ( GUI) and graphics functionality... Read More

A heavyweight component is one that is associated with its own native screen resource (commonly known as a peer). Read More

A lightweight component is one that "borrows" the screen resource of an ancestor (which means it has no native resource of its own -- so it's "lighter"). Read More

Double buffering is the process of use of two buffers rather than one to temporarily hold data being moved to and from an I/O device. Double buffering increases data transfer speed because one buffer can be filled while the other is being emptied. Read More

Clipping is the process of confining paint operations to a limited area or shape. Read More

invokeAndWait() method in swing is synchronous. It blocks until Runnable task is complete. InvokeLater() method in swing is asynchronous. It posts an action event to the event queue and returns immediately. It will not wait for the task to complete Read More

Application must be run explicitly within Java Virtual Machine whereas applet loads and runs itself automatically in a java-enabled browser. Application starts execution with its main method whereas applet starts execution with its init method.... Read More

getParameters() Method is used by the applet to recognize the height and width. Read More

If the applet class is not in the same directory, codebase is used. Read More

setSecurityManager() Method is used for setting security in applets Read More

Changing the state of an object is called an event. An event is an event object that describes a state of change. In other words, event occurs when an action is generated, like pressing a key on keyboard, clicking mouse, etc. There different types of... Read More

AWT is heavy-weight components, but Swing is light-weight components. AWT is OS dependent because it uses native components, But Swing components are OS independent. We can change the look and feel in Swing which is not possible in AWT. Swing takes... Read More

Changing the state of an object is called an event. Read More