Simple j2me program for login

Principal can be temporarily understood as a "Subject" after logging into a system. It is entitled to do something in the system. An "Subject" can have one or more roles.

This depends on the permissions of application for each different user account. In the Java Servlet application, a Servlet Filter is specially used to handle security. It is usually called Security Filter. Below are the operation principles of the Security Filter. When the user accesses a protected page, the Security Filter will test it. If the user is not logged in, the user's request will be redirected to the login page. If the user has accessed successfully, a Principal object is created.

It brings the user's information, including roles. We feel that although high-level playback control of 3D content could be provided by JSR in the future, that specification is not suitable for providing core 3D graphics functionality. Therefore, a separate JSR is needed. The volumetric imaging part of the JSR are not relevant to this JSR, because lightweight 3D content will be represented as polygonal data rather than volumetric data.

The vector math package of JSR should be used at least as a reference if similar functionality is to be defined within the proposed JSR. However, on the target platform the vector operations will in practice be mostly embedded within the implementation? It is unclear whether even a? Mobile devices may feature a great variety of graphical capabilities. In the future, even higher resolutions and color depths are expected. Similarly, processor speeds may range from tens to hundreds of MHz.

The API should accommodate such differences, and be able to take full advantage of increasing capabilities and special hardware, such as 3D accelerators. The main requirements for the API are: Enable the use of 3D graphics on a variety of different applications Do not assume the existence of relatively high-end hardware capabilities Do not impose arbitrary limits on the size or complexity of 3D content Support sophisticated features also on low-end platforms Maintain low ROM and RAM footprint To achieve sufficient generality without burdening the developer with drawing individual pixels, the API needs to be at least at the abstraction level of drawing static 3D objects on command.

Now get all the access to your account in one-click using the official links provided below:. Tags: to http server from j2me program.

J2ME First program. The specification willl address the scalability of a Multimedia API for various devices. To focus the effort, care will be given to ensure that this API will support basic sound functionality on constrained memory devices, with the possibility of additional functionality supported by more capable devices. The specification brings scalable sound and multimedia support capabilities to J2ME. Mobile devices may feature a great variety of multimedia capabilities.

Some of the target devices may only be able to produce single monophonic sounds while others may feature both sampled, synthetic audio and other media types. The API should also be able to support the control of time-based multimedia formats.