Windows 10: WinRAR file but suppose to be JAR file

Basically, me and my friend were trying to install a thing for a game called "Minecraft".
The file is suppose to be JAR file but he forgot to install JAVA, but before he installed it... he kept opening the file with .WinRAR
How do i make the .WinRAR file into a .JAR file?

:)

 

.java to .jar file

As a side note to Easy Rhinos comment, you can only jar .class files, meaning that you need to compile all the .java files and them jar the .class files resulting from the compilation. Example:
Code: javac Test.java jar cf Teste.jar Test.class[/quote]

 

.java to .jar file

if you know the manual then you know you dont put the code in the program, you convert all of your java class files into a jar file using their compiler.

 

.java to .jar file

Hi guys!
I have a problem i think i dont know how to do this little thing
I have searched around the web, but i cant find anyone to explain it how to
and where to put this code down here in order for the compilator to convert it
from .java to a .jar file so the program or games i do in neatbeans can be executed in
my mobile phone!
Anyone can help??? The code is this one:
jar cf jar-file input-file(s)