The MouseWheelEvent in java programming

An event which indicates that the mouse wheel was rotated in a component. A wheel mouse is a mouse which has a wheel in place of the middle button. This wheel can be rotated towards or away from the user. Mouse wheels are most often used for scrolling, though other uses are possible. A MouseWheelEvent...

The MouseEvent class in java programming

An event which indicates that a mouse action occurred in a component. A mouse action is considered to occur in a particular component if and only if the mouse cursor is over the unobscured part of the component's bounds when the action happens. Component bounds can be obscurred by the visible component's...

Java Frame Drag and drop example program

Dragging requires more physical effort than moving the same pointing device without holding down any buttons. Because of this, a user cannot move as quickly and precisely while dragging. However, drag-and-drop operations have the advantage of thoughtfully chunking together two operands (the object...

java code for reading input from console

import java.io.Console; public class MainClass {   public static void main(String[] args) throws ClassNotFoundException    {     Console console = System.console();     if (console == null)   {       System.err.println("sales:...

Masking password input from the console : Java

import java.io.Console; import java.util.Arrays; public class ConsoleMain  {   public static void main(String[] args)  {     Console console = System.console();     String username = console.readLine("Username: ");     char[] password...

The keyEvent class in java Programming

A key event is generated when keyboard input occurs.There are three types of key events ,which are identified by these integer constant KEY_FIRST Marks the first integer id for the range of key event ids. KEY_LAST Marks the last integer id for the range of key event ids. KEY_PRESSED The key pressed...

The ItemEvent class in java programming

An itemEvent is generated when a check or a list item is clicked or when a check able menu item is selected or deselected .There are two types of item events,which are identified by the following integer DESELECTED the user deselected an item SELECTED  the use selected an itemin addition ItemEvent...

The InputEvent class in java programming

InputEvent defines several integer constants that represent any modifiers ,such as the control key pressed ,that might be associated with the event .originally the InputEvent class defined the following modifiers ACTION_EVENT_MASK INPUT_METHOD_EVENT_MASK ADJUSTMENT_EVENT_MASK, ...

The FocusEvent class in java programming

The component-level focus event. There are two levels of focus change events: permanent and temporary. Permanent focus change events occur when focus is directly moved from one component to another, such as through calls to requestFocus() or as the user uses the Tab key to traverse components. ...

The Container class in java programming

A ContainerEvent is generated when a component is added to or removed from a container.There are two typed of container events.The ContainerEvent class defines int constants that can be used to identify the COMPONENT_ADDED and COMPONENT_REMOVED .They indicate that a component has been added to or ...

The ComponentEvent class in java Programming

A ComponentEvent  is generated when the size ,position or visibility of a component is changed .There are four types of component events.The ComponentEvent class defines integer constants that can be used to identity them.The constants and their meaning are shown here COMPONENT_HIDDEN -The...

The AdjustmentEvent class in java programming

An AdjustmentEvent  is generated by a scroll bar.There are five types of adjustment events .The AdjustmentEvent  class defines integer constants that can be used to identity them,The constants and their meanings are shown BLOCK_DECREMENT  -The user clicked inside the scroll bar to...

Action Event class in java Programming

An ActionEvent is generated when a button is pressed ,a lis item is double clicked or menu item is selected .The Action Event class defines four integer constants that can be used to identity any modifiers associated with an action event ALT_MASK ,CTRL_MASK,META_MASK and SHIFT_MASK.In addition there...

Event class and event listener in java programming

This classes that represent events are at the core of java'sevent hanflimg mechanism.This we begin our study of eventhandling with a tour of the events classes .As you will see ,thet provide a consistent easy to use means of encapsulating events ,At the root of the java events c;ass hierachy is Eventobject...

Java AWT: Delegation Event Model

In the event-delegation model, specific objects are designated as event handlers for GUI components. These objects implement event-listener interfaces. The model for event processing in version 1.0 of the AWT is based on inheritance. In order for a program to catch and process GUI events, it must...

Passing Parameter to Applets with example

Java applet has the feature of retrieving the parameter values passed from the html page. So, you can pass the parameters from your html page to the applet embedded in your page. The param tag(<parma name="" value=""></param>) is used to pass the parameters to an applet. For the illustration...

Using the html APPLET tag

This section tells you most of what you need to know to use the <APPLET> tag. It starts by showing you the tag's simplest form. It then discusses some of the most common additions to that simple form: the <PARAM> tag, alternate HTML code and text, the CODEBASE attribute, and the ARCHIVE...

Set Status Message in Applet Window Example

In addition to displaying information in its window ,an applet can also output a message to the status window of the browser or applet viewer on which it is running to do so ,call showStatus() with the string that you want displayed.Th status window is a good place to give the user feedback about what...

First java applet program

Before getting started, you'll need a compiler for Java, so that you can translate source code into something executable. You could, for example, download the Java Software Development Kit (abbreviated as JDK), which includes a compiler, utilities, example applets, and documentation. Be sure to get...

Applet Skeleton And Lifecycle

import java.awt.*; import java.applet.*; /* <applet code="AppletSkel" width=300 height=100> </applet> */ public class AppletSkel extends Applet { // Called first. public void init() { // initialization } /* Called second, after init(). Also called whenever the...

Applet class in java programming

An applet is a small program that is intended not to be run on its own, but rather to be embedded inside another application. The Applet class must be the superclass of any applet that is to be embedded in a Web page or viewed by the Java Applet Viewer. The Applet class provides a standard interface...

Java Applet Basics, Applet Complete tutorial

All applets are subclasses of Applet .Thus,all applets must import java.applet .Applets mus also import java.awt.Recall that awt stands for the Abstract window too kit.Since all applets run in a window ,It is necessary to iclude support for that window .Applets are not executed by the consile based...

Java interface complete tutorial

An interface in the Java programming language is an abstract type that is used to specify an interface (in the generic sense of the term) that classes must implement. Interfaces are declared using the interface keyword, and may only contain method signature and constant declarations (variable declarations...