How do you make a function similar to jar -uf in Java?

Question

Using the standard Java API (i.e. the user doesn't need the JDK to run it), how do you make a function similar to jar -uf in Java? I have an idea that it will use the Zip library, unzip the .jar file, change the contents, and then rezip it, but I'm a newbie at Java, so I cannot really make it. Could you give an example or a function?

Thanks!

Edit: I think I found the answer here: How to use JarOutputStream to create a JAR file? I'll see if it works.

May be util.zip API help you. Refer this link http://docs.oracle.com/javase/6/docs/api/java/util/zip/package-frame.html — kosa, Feb 14 '12 at 16:43
Yeah, I saw that. My question is if someone could make a function or an example because I'm not an expert in Java (just learning). — MiJyn, Feb 14 '12 at 17:10

score 0 · Answer 1 · edited Feb 14 '12 at 17:15

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Take a look at JarInputStream, JarOutputStream, ZipInputStream, and ZipOutputStream. They are a part of the JDK, so external libraries are not required. Pay attention that unlike other streams these require you to care about current entry. You can find a lot of examples of how to use the java zip API.

edited Feb 14 '12 at 17:15

Sean Reilly

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answered Feb 14 '12 at 16:45

AlexR

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Yes, I know about them, but I don't know how to do it. Can you give an example? – MiJyn Feb 14 '12 at 16:50

How do you make a function similar to jar -uf in Java?

1 Answers1