Introduction to Java - Java tutorial

Category: Java tutorials > Basics - Difficulty:

An article on JavaBeans, answers questions like what JavaBeans are and how to create your own JavaBean. Online demo available.

This article discusses the BLOB feature in the database and the author shows on how any file can be stored in the BLOB field of Oracle and can be displayed as an save as attachment dialog box. Very good article for the beginners and intermediate developers who wants to add the file upload and "save As" attachment feature in their struts powered web application .

The ThreadLocal class appeared with little fanfare in version 1.2 of the Java platform. While support for thread-local variables has long been a part of many threading facilities, such as the Posix pthreads facility, the initial design of the Java Threads API lacked this useful feature. Further, the initial implementation was quite inefficient. For these reasons, ThreadLocal gets relatively little attention, but it can be very handy for simplifying the development of thread-safe concurrent programs. This article examines ThreadLocal and offers tips for exploiting its power.

This is a network application which runs on 2 computers. You can operate a remote computer with the help of this application First computer (Lets call it client) creates screen shots and sends them to the other computer(Lets call it server). Server receives snapshots of client machine continuesly and displays them on a Window. On the server side, events are captured (like mouse movement, clicks and keystrokes) and sent to the client application which excutes those events on her side

In our previous tutorial, we showed how to create dynamic images images in a servlet. In this tutorial, we are going to take it a step further by dynamically adding a text watermark to an image as it is requested.