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JUpdater is a project which aims to create a utility that allows developers to quickly implement version checks into Java programs. The utility ensures that the user can always be notified of new versions, and easily upgrade to the latest version from within the program, without having to do anything. The utility only downloads the files that are out of date, saving bandwidth. JUpdater is split into two parts. A small Java client, which can easily be implemented into existing programs. And a PHP server part, which keeps track of the versions and provides the client with all the info it requires. The project is still in its youth, it's functional but expect a bug or two. Any program that is to be updated via JUpdater has to be contained in a jar file. ==Client== A small bundle of classes, a JUpdater client, has to be added to programs so that they can compare their versions with a central server. The client requires JRE 1.5 or greater. The client provides three main operations. # Update a specified jar file by comparing all files' MD5 checksums, this is done in several steps described below. # Check if a new version is available on the server by using the ''Implementation-Version'' attribute in the jar manifest. # Check if a new version is available and get the corresponding changelog by using the Implementation-Version attribute. An interface can optionally be implemented in order to listen to the update process. This information can then for instance be displayed in a GUI for the user. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「JUpdater」の詳細全文を読む スポンサード リンク
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