JAR file is also a archive file just like RAR or Zip. Why do you want to open it in eclipse? You're unclear what you are asking. Please clarify the exactly problem with additional information.
– LuckyDec 23 '16 at 09:32
I just want to edit it directly if it possible, I don't want to decompile it and export it...
– MrAnonymuszDec 23 '16 at 09:35
If you want to edit the jar file contents, you modify the file and you must recreate the jar. You can't directly edit and save the changes as is. Refer http://stackoverflow.com/questions/1224817/modifying-a-file-inside-a-jar and http://stackoverflow.com/questions/4837500/how-can-i-edit-a-jar-file
– LuckyDec 23 '16 at 09:38
Possible duplicate of [How can I edit a .jar file?](http://stackoverflow.com/questions/4837500/how-can-i-edit-a-jar-file) or [Modifying a file inside a jar](http://stackoverflow.com/q/1224817/1793718)
– LuckyDec 23 '16 at 09:40