What is a .JAD file?
A .JAD file is a special kind of text file that gives information about Java programs, specifically those made to run on older cell phones or small devices. These Java programs are called MIDlets. Think of a .JAD file as a label on a jar that tells you what's inside and how to use it. It includes details like the program's name, version, and where to find the actual program file, which is usually a .JAR file. Sometimes, it also has security details to protect the program.
People used to use .JAD files a lot for Java games and apps on cell phones. To open a .JAD file, you could use a program called LogoManager MobiMB Mobile Media Browser, but it's not available anymore. Another option is JADMaker.
When someone creates a Java app for mobiles, they use a special toolkit called the Java ME Software Development Kit. This toolkit helps them bundle their app into a MIDlet, which includes the .JAD file and a .JAR file. The .JAR file is like the jar that the label (.JAD file) describes; it holds all the parts of the app, like the code and images.
In the .JAD file, there are some details that have to be there, like the app's name and where to find the .JAR file. There can also be extra details, like an icon for the app, a short description, and how big the app is. These details help the phone or device understand how to install and run the Java app correctly.
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