JAR(Java Archive) is a platform-independent file format, which allows many record group files to be compressed into one file. JAR files created for J2EE applications are EAR files (enterprise JAR files).
the formats of p>JAVA e-books for mobile phones are generally jar and JAD, in which JAD file is a description file that describes the information of JAR file. Some mobile phones do not support reading JAR directly (this is caused by the mobile phone security policy), so JAD files are needed. There are only a few such mobile phones. Java runs on the java virtual machine, that is, JVM, and many low-end models can also support java, so it is doomed that the application scope of java format is quite wide. Because java can provide rich interactive behaviors, it is the best in supporting graphics, text and multimedia. In addition, the reader and text are packaged together (jar), so it can be read only by installing it, without installing another reader or downloading e-books.
Compared with previous e-book reading devices, the biggest advantage of mobile phones is their convenience and portability. However, its shortcomings are limited screen reading and few readable resources. At present, the design of mobile phones is polarized. One trend is getting smaller and smaller, taking the road of dexterity and exquisiteness, and the other trend is getting bigger and bigger, taking the road of rich and perfect functions and moving closer to PDA. Undoubtedly, only this trend is suitable for the development of mobile e-books. However, for most users at present, it is still very inconvenient to read tens of thousands of words of e-books with a mobile phone that displays several lines per screen.
At present, there are many softwares that can make e-books, such as mBookMaker developed by Palm College. Friends who want to convert their own words into e-books may wish to try.
Because different brands of mobile phones have different hardware and software, not all mobile phones can support mobile e-books. Relatively speaking, Nokia, Motorola and other brands of mobile phones must have suitable e-books as long as they can support JAVA.
But there are also some excellent JAR reading software, which can directly read novels in TXT.HTML.UMD and other formats. Anyview3., for example, is a very good mobile phone e-book software
It takes some patience to make mobile phone e-books. If you don't have patience, you can also go directly to some websites that provide downloaded mobile phone e-books: