Archive for: September, 2014

The APPLET Tag

The APPLET Tag The source code starts with the APPLET lag for Lavatron, there, This applet looks best when the width is an even multiple of the bulb Size and is the bulb size times the source image heiglu. The only parameter is Ior the name of the source image file, named imge. Lavatron java The main…

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The Source Cod

The Source Cod Lavatron starts by initializing data; which includes loading.the source image and creating the column of bulb images. The last stage of the initialization is painting the offscreen (double buffer) image full of dimmed (black) lightbulbs to start thedisplay with a clean image. Subsequent painting of the offscrecn image begins by using copyAreaf ) to move the…

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How Lavatron Works

How Lavatron Works Lavatron is able to present an interesting image onscrccn because of a small trick that it employs, and its side effect allows the applct io load very quickly. The reason it loads so quickly is that there isn’t much data transmitted over the Net. The source image is a JPEG image that is 64 times…

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Converting Default Arguments

Converting Default Arguments One extensively used feature of c++ that Java docs not support is default  unction arguments. For example, tile areal ) function shown in the following c++ program computes the area of a rectangle if called with two arguments, 01′ the area of a square if called with one argument. As Connolly see, when are…

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Converting C++ Abstract Classes into java Interface

Converting C++ Abstract Classes into java Interface One of the most innovative aspects of Java is the interface. As explained earlier in this book, an interface specifies the form of its various methods without specifying any implementation details. Each class that implements In interface does so by creating the actual methods declared by the interface. Thus, in Java…

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c++ Reference Parameters Versus Java Reference Parameters

c++ Reference Parameters Versus Java Reference Parameters In the preceding section, you saw an example of a C++ program that used a pointer parameter. In Java, this became a reference parameter. Of course, C++ also supports reference parameters. As mentioned, most pointer parameters found in C++ code are simply holdovers from C. Nearly all new C++ code will…

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Converting Pointers that Operate’ on Arrays

Converting Pointers that Operate’ on Arrays Conceptually, converting C++-style pointer-based array accessing into the  equivalent java-compatible array indexing is straightforward-simply substitute the appropriate array-indexing statements. However, in practice this may require some thought. ” Pointer-based array accessing can be a bit difficult to follow, because the normal C++ coding style encourages rather dense, complex expressions. For example, this…

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Eliminating Pointer

Eliminating Pointer When you convert a c++ program into Java, perhaps the: greatest number of changes Will be car seed by pointers. Most <#+ code is heavily dependent upon pointers for its operation. You can’t program anything very Significant in C++ without using a pointer. There are four general categories of pointer usage that you will encounter in C++ code.…

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Dynamic Billboard java

Dynamic Billboard java This is the main applet class. lt implements Runnable to include a thread-that’ controls the continuous process of creation and animation of the transitions. transition classes array stores the names of the transition classes as strings. It uses strings because it loads these classes dynamically using the method java.lang. ass for Name (String), This allows…

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Migrating from C+tto Java

Migrating from C+to Java T’his chapter discusses several of the issues that arise when you move from C++ ,to  Java. Since happy (if not most) Java programmers come from a C++ background, it is natural to want to carryover the skills, techniques, and code acquired in this language. Although C++ and Java were designed to address the programming needs of two…

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