JAR files are packaged with the ZIP file format, so you can use them for tasks such as lossless data compression, archiving, decompression, and archive unpacking.
See the section on Understanding the Manifest for information about special headers.) You would first prepare a text file containing the headers that you wish to add to the default manifest.
Java Update is a feature that keeps your Windows computer up-to-date with the latest Java releases.
This section shows you how to invoke and run applets and applications that are packaged in JAR files.
(Version and vendor information is contained in special headers that you can add to a JAR file's manifest.
For daily updates, you can select the time of the day for the update.
For weekly updates, you can select the day of the week and the time of the day.Alternatively, you can go to get the latest Java version.After updating the Java version, you need to close and restart the Java Control Panel to get the updated Control Panel.You can schedule how often to check for updates, or check manually at any time.By enabling your system to check for the latest version, you keep your system secure with the latest patch updates. I am using text file to store all my data's that are to be displayed in my jsp.