Help unzipping and viewing .zip, .class, and .jar files

[SassyLearner15]

Hello All,

Please advise. I discovered multiple zipped files on my computer and I am trying to determine what, if anything, they contain. I have watched soooooo many videos on YouTube about unzipping and "decompiling" and have even used software like "jd-gui" and Unarchiver to unzip the files. I tried to download and use Unrar X like many of the tutorials suggested but the website says "the account is suspended". I find that I can unzip the files but when I use the "jd-gui" software it turns everything into a bunch of bytecode (which I had never even heard of before now and do not understand).

So, in short, my questions are A) Do these files really contain movies, docs, images, etc. like the file names suggests? B) Is it possible to actually view what the files were instead of only seeing a bunch of code? C) What reason would someone typically need to format files in this manner?

See images below for reference. Any advice or instructions (in laymen terms please) are much appreciated, so thank you in advance!!!
P.S. I'm not sure if it matters but my device is a Mac running on Yosemite. Thanks again. Ciao!

 

[carnageX]

Looks like that's the file structure for a Java-based program on your system.

.JAR files are Java archive files used by Java programs.
.CLASS files are Java class files that contain code.

The "movies, docs, images" etc. that you see are most likely resources for the program.