Archive for: September, 2014

Check Boxes

Check Boxes The Check Box class, which provides the functionality of a check box, is a concrete implementation of Abstract Button. Some of its constructors are shown here: JCheckBox(lcon I) JCheckBox(Icon i, boolean slate) JCheckBox(String s) JCheckBox(String 5, boolean state) JCheckBox(String 5, Icon I) JCheckBox(String 5, Icon i, boolean state) Here, j is the icon…

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Crop image Filter

Crop image Filter Crop Magel filters an image source to extract a rectangular region. One situation in which this filter is valuable is where you want to use several small images from a single, larger source image. Loading twenty 2K images takes much longer than loading a single 40K image that has many frames of an animation tiled into it.…

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Image Filter Demo java

Image Filter Demo java The ImageFilter Demo class is the applet framework for our sample image filters, It employs a simple Borderlayout, with a Panel at the Soutl: position to hold the buttons that will represent each filter. A Label object occupies the North slot for informational messages about filter progress. The Center is where the image (which…

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Loaded Image java

Loaded Image java Loaded Image is a convenient subclass of Canvas, which takes an image at construction time and asynchronously loads it using MediaTracker. Loaded Image the behaves properly inside of Layout Manager control, because it overrides the getPreferredSize( ) and getMinimumSize( ) methods. Also, it has a method called sct( ) that can be used to set a !lew…

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Contrast.java

Contrast.java The Contrast filter is very similar to Grayscale, except its override of filth crRCO( ) is , slightly more complicated. The algorithm it uses for contrast enhancement takes the red, green, and blue values separately and boosts them by ‘1.2 times if they arc already brighter than 128. If they are below 128, then they are…

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The Blur

The Blur The Blur ‘filter is a subclass of COnvolver and simply runs through ~very pixel in the source image array, img pixels, and computes the average of the 3 x3 box surrounding it. The corresponding output pixel in newimg pixels is that average value. Sharpen’.Java  The Sharpen filter is also, a subclass of Convolver ‘and is…

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Cell Animation

Cell Animation   Now that we have presented  an overview of the image APls, WI! .in put together an interesting applet that will display a sequence of animation cels, .he animation cells are taken from a single image that can arrange the cells in a grid specified via the rows and cols cparam tags. Each cell in the…

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Buttons

Buttons Swing buttons provide features that arc not found in the Button class defined by the AWT. For example, you can associate an icon with a Swing button. Swing buttons are subclasses of the Abstract Button class, which extends ]Component. AbstractButton contains many methods that allow you to control the behavior of buttons, check b oxes and radio…

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A Tour Of Swing Servlets

A Tour Of Swing Servlets In Part II.you saw how to build user interfaces with the AWT classes. Here, we will take a top of a supercharged alternative Swing is a set of classes that provides more powerful and flexible components than are possible with the AWT. In addition’ to the familiar components, such as buttons, check boxes,…

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Constrained Properties

Constrained Properties A Bean that has a constrained property generates an event when an attempt is made to change its value. The event is of type Property Change Event. It is sent to objects that, previously registered an interest in receiving such notifications. Those other objects have the ability to veto the proposed change. This capability allows a…

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