How to Edit and Compile Java Jar Files

In this video I show a basic and simple process to edit and make changes to a JAR file. I use the following Java Decompiler to de-compile the class files in the jar file.

What is a JAR File?
A JAR is a package file format typically used to aggregate many Java class files and associated metadata and resources into one file for distribution. JAR files are archive files that include a Java-specific manifest file. They are built on the ZIP format and typically have a .jar file extension.

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Thanks.

[AzaleaTFG]

thank you, i wanted to make a simple change and all the reddit resources kept saying don't do it because you will mess up, but its just changing a mods units and adding a few files.

[kylecaudill]

Thank you. I look forward to editing my game files.

[jiocrestfall]

i followed the steps and kept going fine up til i needed to compile the java file i wanted to edit: a hundred errors being shown out of 300+ saying "item does not exist" for almost all the lines

pls help :<

[sankeths]

simple video which added great value, thanks very much sir

[justnormalyou]

Thanks man, imma decompile a java phone game and modify shit, thansk again!

[Pelota]

When I tried using the javac part, I get a bunch of errors and cant generate .class

[yers]

Nice i can decompile files but i dont know how to recompile them nice tutorial!

[chrispharaoh]

I liked your video very much it answered my question

[googologyx]

I tried the javac command on a bunch of files in my Minecraft JAR file and it came back with a handful of errors

[Elphoquito]

cant return into .Class file i get error in cmd

[padlock]

Hi i get error when compiling. without changing anything from the .java file

[tonyfuentes]

Than you bro
Question can you make a video explaining the obfuscated and de-obfuscated java files
Please thank you

[Red-ne]

getting bunch of erros when trying the javac command

[manjeetcscmahisaur]

Sir me java file me convart kar le raha hua lekin mai class file me nahi ho paa raha hai

[MS-cndh]

Hi.. I followed these steps but when I do javac filename.java in cmd, it gives me 5 errors. The errors are: cannot find Symbol (for class names). How to resolve this???

[GooseAlarm]

what if the file you want to edit is a .json?

[banglagaming]

When I am going to open a jar file through jd gui, it just doesn't open!!!
What should I do now???

[bharathreddygajjala]

How do I add other package references to compile. I have dependency on other jar/packages.

[Aru]

Bro i don't understand anything clearly please make another video how to convert jar files into Java and then edit with the example of any game or app

[walidpw]

please any one can help me with this error : javac acceuil.java
acceuil.java:3873: error: variable declaration not allowed here
boolean bool = (new
^
1 error

all the fille are in the same folder, thank you