What causes "Unable to access jarfile" error?

I had a similar problem and I even tried running my CMD with administrator rights, but it did not solve the problem.

The basic thing is to make sure to change the Directory in cmd to the current directory where your jar file is.

Do the following steps:

1. Copy jar file to Desktop.

2. Run CMD

3. Type command cd desktop

4. Then type java -jar filename.jar

This should work.

Edit: From JDK-11 onwards ( JEP 330: Launch Single-File Source-Code Programs )

Since Java 11, java command line tool has been able to run a single-file source-code directly. e.g.

java filename.java

If you are using OSX, downloaded files are tagged with a security flag that prevents unsigned applications from running.

to check this you can view extended attributes on the file

$ ls -l@
-rw-r--r--@ 1 dave  staff  17663235 13 Oct 11:08 server-0.28.2-java8.jar
com.apple.metadata:kMDItemWhereFroms         619
com.apple.quarantine          68

You can then clear the attributes with

xattr -c file.jar

None of the provided answers worked for me on macOS 11 Big Sur. The problem turned out to be that programs require special permission to access the Desktop, Documents, and Downloads folders, and Java breaks both the exception for directly opened files and the permission request popup.

Fixes:

• Move the .jar into a folder that isn’t (and isn’t under) Documents, Desktop, or Downloads.
• Manually grant the permission. Go to System Preferences → Security and Privacy → Privacy → Files and Folders → java, and check the appropriate folders.

It can happen on a windows machine when you have spaces in the names of the folder. The solution would be to enter the path between " ". For example:

java -jar c:\my folder\x.jar    --> 
java -jar "c:\my folder\x.jar"

I know this thread is years ago and issue was fixed too. But I hope this would helps someone else in future since I've encountered some similar issues while I tried to install Oracle WebLogic 12c and Oracle OFR in which its installer is in .jar format. For mine case, it was either didn't wrap the JDK directory in quotes or simply typo.

Run Command Prompt as administrator and execute the command in this format. Double check the sentence if there is typo.

"C:\Program Files\Java\jdk1.xxxxx\bin\java" -jar C:\Users\xxx\Downloads\xxx.jar

If it shows something like JRE 1.xxx is not a valid JDK Java Home, make sure the System variables for JAVA_HOME in Environment Variables is pointing to the correct JDK directory. JDK 1.8 or above is recommended (2018).

A useful thread here, you may refer it: Why its showing your JDK c:program files\java\jre7 is not a valid JDK while instaling weblogic server?

For me it happen because i run it with default java version (7) and not with compiled java version (8) used to create this jar.

So i used:

%Java8_64%\bin\java -jar myjar.jar

Instead of java 7 version:

java -jar myjar.jar

Maybe you have specified the wrong version of your jar.

I finally pasted my jar file into the same folder as my JDK so I didn't have to include the paths. I also had to open the command prompt as an admin.

1. Right click Command Prompt and "Run as administrator"
2. Navigate to the directory where you saved your jdk to
3. In the command prompt type: java.exe -jar <jar file name>.jar

Keep the file in same directory where you are extracting it. That worked for me.

This is permission issue, see if the directory is under your User. That's why is working in another folder!

Have you tried to run it under administrator privoleges? meaning, running the command in "Run As" and then select administrator with proper admin credentials

worked for me

I was trying this:

After giving the file read, write, execute priviledges:

chmod 777 java-repl.jar

alias jr="java -jar $HOME/Dev/java-repl/java-repl.jar"

Unable to access bla bla..., this was on Mac OS though

So I tried this:

alias jr="cd $HOME/Dev/java-repl/ && java -jar java-repl.jar"

This did not work "Unable to access jarfile"

"C:\Program Files\java\jdk-13+33-jre\bin\javaw.exe" -jar "C:\Program Files\Maxim Integrated Products\1-Wire Drivers x64\ OneWireViewer.jar"

This does work

"C:\Program Files\java\jdk-13+33-jre\bin\javaw.exe" -jar "C:\Program Files\Maxim Integrated Products\1-Wire Drivers x64\OneWireViewer.jar"

The difference is the single space in front of OneWireViewer.jar not withstanding that it is surrounded with quotes and even has other spaces.

If you are on WSL, and following a guide which say, says this:

java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb

You actually need to specify the full path, even though you've provided it in the java.library.path part.

java -Djava.library.path=/mnt/c/dynamodb_local/DynamoDBLocal_lib -jar /mnt/c/dynamodb_local/DynamoDBLocal.jar -sharedDb

Rename the jar file and try

Explanation : yes, I know there are many answers still I want to add one point here which I faced.

I built the jar and I moved it into the server where I deploy (This is the normal process) here the file name which I moved already existed in the server, here the file will override obviously right. In this case, I faced this issue. maybe at the time of overriding there can be a permission copy issue.

Hope this will help someone.

For me the problem got resolved after accessing the folder in which the jar was placed earlier I was giving command on D: drive, but when I navigated to the folder in which that jar was placed this problem got resolved

If you're working with shared folders on a virtual machine (in my case virtualbox), it seems all my permission were missing to access the file. Additionally, it required elevated privileges to chmod the file.

sudo chmod +rwx filename.jar

After this you should be able to access the jarfile normally.

In my case, the / of the jar's path pointed to the root directory of the filesystem, not the root of the project.

The path was fixed by replacing / by ./ to get the current working directory instead of the root directory.

This is possible if you're running the command on another filesystem like with heroku: heroku local web for example.

first I created a variable %JAVA_HOME% :

When you downloaded the file, make sure to check UNBLOCK TAB in file properties as shown above in "maartencls" post .

c:\users\my user\downloads\location of the file\all> java -jar yourfilename.jar

hope this will resolve the issue :)

First run: java -version

and then run: java -jar Calculator.jar

This worked for me.

You can specify the full path to your java.exe file, for example:

"c:\Program Files\Java\jdk-9.0.4\bin\java.exe" -jar path_to_your_jar_file.jar

it helped me.

Or check what java.exe file runs for default in your system, especially if you have many versions of JDK/JRE.