What causes Unable to access jarfile error

Question

I want to execute my program without using an IDE   I ve created a jar file and an exectuable jar file  When  I double click the exe jar file  nothing happens  and when I try to use the command in cmd it gives me this    Error  Unable to access jarfile  lt path gt    I use the command  java -jar Calculator jar  How I created the jar    Right click on project folder  Calculator          Select Click on Java Folder and select  Exectuable Jar File   then select next Launch Configuration  Main - Calculator Create Export Destination Hit  Finish  and profit  Well  not really

User · Answer

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

User · Answer

First run  java -version  and then run  java -jar Calculator jar  This worked for me

User · Answer

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 gt  java -jar yourfilename jar   hope this will resolve the issue

User · Answer

Just came across the same problem trying to make a bad USB     I tried to run this command in admin cmd  java -jar c  fw ducky duckencode jar -I c  fw ducky HelloWorld txt  -o c  fw ducky inject bin   But got this error   Error  unable to access jarfile c  fw ducky duckencode jar   Solution  1st step  Right click the jarfile in question  Click properties   Click the unblock tab in bottom right corner  The file was blocked  because it was downloaded and not created on my PC   2nd step  In the cmd I changed the directory to where the jar file is located   cd C  fw ducky    Then I typed dir and saw the file was named duckencode jar jar  So in cmd I changed the original command to reference the file with  jar jar  java -jar c  fw ducky duckencode jar jar -I c  fw ducky HelloWorld txt  -o c  fw ducky inject bin   That command executed without error messages and the inject bin I was trying to create was now located in the directory   Hope this helps

User · Answer

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

User · Answer

Possibly Windows only   Beware of spaces in the path  even when your jar is in the current working directory   For example  for me this was failing   java -jar myjar jar   I was able to fix this by givng the full  quoted path to the jar   java -jar    dp0 myjar jar     Credit goes to this answer for setting me on the right path

User · Answer

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   amp  amp  java -jar java-repl jar

User · Answer

In my case the suggested file name to be used was jarFile  jar in the command line  The file in the folder was jarFile-1 2 3 jar   So I renamed the file to jarFile  Then I used jarFile jar instead of jarFile  jar and then the problem got resolved

User · Answer

In my issue to access directory from Command line  in windows  this error       unnable to access        because wrong file extension      file jar jar       so change it to correct one      file jar      good luck

User · Answer

I had encountered this issue when I had run my Jar file as   java -jar TestJar  instead of   java -jar TestJar jar  Missing the extension  jar also causes this issue

User · Answer

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   Copy jar file to Desktop   Run CMD  Type command cd desktop  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

User · Answer

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

User · Answer

sometime it happens when you try to  run or create  a  jar file under  libs folder by right click it in android studio  you can select the dropdown in top of android stuio and change it to app  This will work

User · Answer

To avoid any permission issues  try to run it as administrator  This worked for me on Win10

User · Answer

It can also happen if you don t properly supply your list of parameters  Here s what I was doing    java -jar test gmail com testing subject file txt test send emails jar   Instead of the correct version    java -jar test send emails jar test gmail com testing subject file txt

User · Answer

I had the same issue when trying to launch the jar file  The path contained a space  so I had to place quotes around  Instead of   java -jar C  Path to File myJar jar   i had to write  java -jar  C  Path to File myJar jar

User · Answer

this is because you are looking for the file in the wrong path 1  look for the path of the folder where you placed the file 2  change the directory cd in cmd use the right path

User · Answer

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

User · Answer

I use NetBeans and had the same issue  After I ran build and clean project my program was executable  The Java documentation says that the build clean command is for rebuilding the project from scratch basically and removing any past compiles  I hope this helps  Also  I d read the documentation  Oracle has NetBeans and Java learning trails  Very helpful  Good luck

User · Answer

You can specify full path to your java exe file  fo example   quot c  Program Files Java jdk-9 0 4 bin java exe quot  -jar path to your jar file jar it s help for me  Or check what java exe file runs for default in you system  espacially if you have many version of JDK JRE

User · Answer

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

User · Answer

This worked for me   cd  path to the jar   java -jar   Calculator jar

User · Answer

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    -- gt   java -jar  c  my folder x jar

User · Answer

For me it happens if you use native Polish chars in foldername that is in the PATH  So maybe using untypical chars was the reason of the problem

User · Answer

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

User · Answer

I had a similar problem where TextMate or something replaced the double quotes with the unicode double quotes   Changing my SELENIUM SERVER JAR from the unicode double quotes to regular double quotes  and that solved my problem

User · Answer

My particular issue was caused because I was working with directories that involved symbolic links  shortcuts   Consequently  trying java -jar       myJar jar didn t work because I wasn t where I thought I was    Disregarding relative file paths fixed it right up

User · Answer

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

User · Answer

Right click the parent folder of the file  gt  properties  gt  check off Read Only

User · Answer

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

User · Answer

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    Right click Command Prompt and  Run as administrator  Navigate to the directory where you saved your jdk to In the command prompt type   java exe -jar  lt jar file name gt  jar

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

Maybe you have specified the wrong version of your jar

User · Answer

I had this issue under CygWin in Windows  I have read elsewhere that Java does not understand the CygWin paths   cygdrive c some dir instead of C  some dir  - so I used a relative path instead        some dir sbt-launch jar

User · Answer

Fixed  I just placed it in a different folder and it worked

[java] What causes "Unable to access jarfile" error?

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