CODEWITHSUNDEEP
javawindows
Bobby C
Bobby C

Reputation: 2085

Extracting .jar file with command line

I am trying to extract the files from a .jar file. How do I do that using command line?

I am running Windows 7

Upvotes: 172

Views: 535405

Answers (9)

Nikhil Arora
Nikhil Arora

Reputation: 339

You can use the following command: jar xf rt.jar

Where x stands for extraction and the f would be any options that indicate that the JAR file from which files are to be extracted is specified on the command line, rather than through stdin.

Upvotes: 13

Raj Ramaswamy
Raj Ramaswamy

Reputation: 19

I had the same issue and the jar command did not work. I made a copy of the jar file and changed the extension to .zip. Then right click on the .zip file and select 'Extract All'. This extracted all the files.

Upvotes: 1

AusCBloke
AusCBloke

Reputation: 18492

From the docs:

To extract the files from a jar file, use x, as in:

C:\Java> jar xf myFile.jar

To extract only certain files from a jar file, supply their filenames:

C:\Java> jar xf myFile.jar foo bar

The folder where jar is probably isn't C:\Java for you, on my Windows partition it's:

C:\Program Files (x86)\Java\jdk[some_version_here]\bin

Unless the location of jar is in your path environment variable, you'll have to specify the full path/run the program from inside the folder.

EDIT: Here's another article, specifically focussed on extracting JARs: http://docs.oracle.com/javase/tutorial/deployment/jar/unpack.html

Upvotes: 237

abe312
abe312

Reputation: 2635

jar xf myFile.jar
change myFile to name of your file
this will save the contents in the current folder of .jar file
that should do :)

Upvotes: 3

user4566153
user4566153

Reputation: 21

Given a file named Me.Jar:

  1. Go to cmd
  2. Hit Enter

  3. Use the Java jar command -- I am using jdk1.8.0_31 so I would type

    C:\Program Files (x86)\Java\jdk1.8.0_31\bin\jar xf me.jar

That should extract the file to the folder bin. Look for the file .class in my case my Me.jar contains a Valentine.class

Type java Valentine and press Enter and your message file will be opened.

Upvotes: 1

VijayaKumar Thangavel
VijayaKumar Thangavel

Reputation: 514

To extract the jar into specified folder use this command via command prompt

C:\Java> jar xf myFile.jar -C "C:\tempfolder"

Upvotes: -4

burtsevyg
burtsevyg

Reputation: 4076

In Ubuntu:

unzip file.jar -d dir_name_where_extracting

Upvotes: 55

D3_JMultiply
D3_JMultiply

Reputation: 1080

Java has a class specifically for zip files and one even more specifically for Jar Files.

java.util.jar.JarOutputStream
java.util.jar.JarInputStream

using those you could, on a command from the console, using a scanner set to system.in

Scanner console = new Scanner(System.in);
String input = console.nextLine();

then get all the components and write them as a file.

JarEntry JE = null;
while((JE = getNextJarEntry()) != null)
{
    //do stuff with JE
}

You can also use java.util.zip.ZipInputStream instead, as seeing a JAR file is in the same format as a ZIP file, ZipInputStream will be able to handle the Jar file, in fact JarInputStream actually extends ZipInputStream.

an alternative is also instead of getNextJarEntry, to use getNextEntry

Upvotes: 2

Hot Licks
Hot Licks

Reputation: 47729

Note that a jar file is a Zip file, and any Zip tool (such as 7-Zip) can look inside the jar.

Upvotes: 53

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