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Lawrence Rodrigues

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As images come in different sizes and formats, image loading is often a complex and time consuming process. Image loading usually consists of fetching the image file, reading the header, decoding the compressed pixels' values, and then delivering the pixels. Java currently supports two types of images, JPEG and GIF. The loading mechanisms for these formats are already built-in. If other formats are involved, users will have to write their own loading programs. Image loading may mean different things to different applications. Some applications may display images directly without explicitly using image properties or pixel values. In this case, image loading involves fetching the image as a single object. Image animation is an example of such an application. In some applications, pixels may have to be manipulated. Image loading for such applications will include fetc... (more)

JavaBeans vs Enterprise JavaBeans

JavaBeans has been at the center of many new paradigms and technologies that have emerged since its inception. Among emerging technologies, Enterprise JavaBeans has generated tremendous interest in the business computing community. However, a common misconception is that an Enterprise JavaBean is an extension of a "plain vanilla" JavaBean with enterprise functionality. While both JavaBeans and Enterprise JavaBeans are software component models, their purpose is different. A JavaBean is a general-purpose component model, whereas EJB, as the name suggests, is a component model that i... (more)

Using Inner Classes

In JDK 1.1, no other new feature is likely to have more impact on Java programmers than the less-publicized inner classes feature. It'll change the way in which Java programs have been traditionally written. The primary goal of this feature is to provide the ability to declare classes within classes. To incorporate the new inner classes syntax and scope rules, a few significant changes were made to the Java language specifications. However, no changes were made to the Java Virtual Machine. This is because the new compiler implements the inner classes syntax using Java 1.0, which h... (more)

On JavaBeans Customization

JavaBeans, now in its third year, is proving to be a powerful component model. Whether it's the Java e-commerce framework or the Java platform for the enterprise, JavaBeans is at the heart of many new and exciting technologies. The JavaBeans model provides a framework to build, customize, run and deploy Java software components. While there are numerous books and articles on JavaBeans, not many of them deal with the customization aspect of JavaBeans. An object that conforms to the JavaBeans specs is called a JavaBean or, more generally, a bean, which at runtime is like any other ... (more)

Java Beans: The Next Generation

Ever since it was announced in May of 1996, Java Beans has been a topic of great interest among Java developers. The first generation Java technology embodied several modern software engineering concepts such as object-orientation, platform independence, multithreading, network awareness, etc. However, it lacked a few important elements, including support for visual assembly of software components, object persistence and distributed computing. Java Beans is the next generation Java technology that not only adds the functionality it lacked but also makes Java programs more portabl... (more)