How to run jar file by double click on Windows 7 64-bit

Question

Running a  jar file in a command line works fine  but i am not able to run any  jar file by double clicking on my Windows 7  64   It seems nothing happens after the double click   I tried the ftype hint  no success   ftype jarfile  C  Program Files Java jre7 bin javaw exe  -jar   1       I reinstalled the JDK 7 64-bit  no success   Any idea

User · Answer

http   www wikihow com Run-a- Jar-Java-File   Assuming you ve loaded the Java JRE and or Java SDK  then To do associations  go to  My Computer   click on one of your drives  C  for instance   When it is shown  choose  Tools        Folder options   or Properties    it s in different places depending on the Windows version   Open Windows Explorer  just open any folder  to get the  Tools  -   Folder options  window  When you get the  Folder options  window  click on the tab  File types   You should be able to either edit or add JAR files   jar extension  Change the program used to open JAR files  In the file select window  go to the folder where the JRE is installed  should be C  Program Files Java      mark  Always open with   and select the javaw exe file

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You may also run it from the Command Prompt  cmd    java exe -jar file jar

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I had the problem that windows was blocking it from running  Windows 10 Pro   Right click icon  properties  in the bottom right corner it might tell you  Windows has blocked the functionality          next to it there is a check box labeled  Unblock   uncheck the box  apply  option to block goes away and then you can run it

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Your problem might also be inside your Java code setting  I mean  if your program somehow could not realize the main class main file  entry point   it will not launch the the program  jar  specially application built on IDE s   To solve that on an IDE     Right Click the project   Properties   Run   Browse Main Class   OK  Clean and Rebuild   Try running it now  Hope it helps

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I had the same problem with  jar files not opening on a double click  It turned out that I had two versions of Java installed  Java 6 and 7   Uninstalling Java 6 from Control Panel-  Uninstall a Program was what finally allowed  jar files to open on a double click without using the command window

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I had this same issue  and searched the internet for a solution and none of the suggestions didn   t not open by double clicking the  jar file   In my case the reason is I have multiple JDK  amp  JRE versions installed on my computer  Since I am a software developer working with several different versions for different clients I need to use multiple JDKs in my PC  Windows 10 Pro   So I do not want to change the system variables  i e  JAVA HOME  JRE HOME or PATH   instead I use command prompt to run java in user process whenever I wanted to use a different version   When installing JDK it registers the  jar file association with latest version we installed in the PC  If you right click on the  jar icon and select properties  it will show that file opens with    Java TM  Platform SE Binary      If we look at the registry key  HKEY CLASSES ROOT jarfile shell open command  it will point to latest JDK version   It is not a good idea  sometimes annoying  to change the registry key every time I want to run an app build from a different version   So in my situation it is impossible to just double click the  jar file to execute it  But instead I found a work around solution myself    Scenario   Multiple JDKs  1 7  1 8  9 0  10 0  11 0  and 12 0 are installed in the PC  so the latest installed was 12 0   Problem  Want to double click an executable  jar developed using JDK 1 8 and didn   t work  This is my work around solution    Create a shortcut for the  jar file that you want to open    Right click the shortcut icon and select properties -  Shortcut tab  Change the text in the target  for example  D  Dev JavaApp1 8 jar    To    C  Program Files Java jdk1 8 0 bin javaw exe  -jar      D  Dev JavaApp1 8 jar   Then click ok Double click the shortcut    It should now open the app

User · Answer

Had to try this    Open command prompt as admin Move to the file folder using cd command Type java exe -jar  filename  jar Press enter   The app should pop right after that

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I created a project  JAR Runnr  for precisely this      http   projects killerapplets com JAR Runner

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For Windows 7    Start  Control Panel  Click  Default Programs  Click  Associate a file type or protocol with a specific program  Double click  jar Browse C  Program Files Java jre7 bin javaw exe Click the button Open Click the button OK

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This is my way      Create file bat  example openJar bat     echo off start javaw -jar   1     exit  Cut it and paste to C  Program Files Java  bin  this step is unnecessary  but you should it     Right click jar file   Properties   Choose open with  Change button   and select your file bat    Double click your jar file to test it

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What is listed in right-click-  Open With   Is some other program listed as the default program   Is a Java Runtime listed   If a Java Runtime is listed  you can open with it  and make it the default program to run with   ie    Right Click -   Properties -  Change -  C  Program Files Java jre7 bin javaw exe

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Installing the newest JRE fixed this for me    Even though I had a JDK and JRE s  installed before

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I had the same issue   if I doubleclick on a jar executable file  and my Java application does not start   So  tried to change manually also registry key  but it didn t help me  Tried to reinstall JDK newer older without any result   I have several versions of Java    And I ve solved it only using jarfix program  Jarfix automatically fixed  jar association problem on Windows system   check regedit  PC HKEY CLASSES ROOT jarfile shell open command    What says Johann Nepomuk L  fflmann      The root cause for the problem above is  that a program has stolen the    jar association  If you have installed the Java Runtime Environment   the first time  the file type called  jar  is assigned to javaw exe   correctly   jar  is an abbreviation for  java archive  and javaw exe   is the correct program to execute a  jar  However  on Windows any   program can steal a file type at any time even if it is already   associated with a program  Many zip unzip programs prefer to do this    because a jar is stored in the  zip format   If you doubleclick on a    jar  your pack program opens the file  rather than javaw runs the   program  because your pack program ignores the meta information which   are also stored in a  jar  In the Oracle bug database there is the   low-priority report 4912211  add mechanism to restore hijacked  jar   and  jnlp file extensions   but it has been closed as  Closed  Will   Not Fix        You may also miss the file connection with  jar if you are using a   free OpenJDK without an installer    Notice  my OS is Windows 10  but logic is the same for 7  8 and so on   Helpful links  https   windowsreport com jar-files-not-opening-windows-10  https   johann loefflmann net en software jarfix index html

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change the default application for JAR files from java exe to javaw exe from your JAVA HOME bin folder   This is because  java exe is console application only  but JAR file needs a window rendered execution  Since javaw exe is a window application  it is preferred for the execution of JAR files   An alternative to this is that to some extent you can use command prompt to run your JAR files by simply using java keyword with -jar attrib

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I tried all above steps to resolve the problem but nothing worked  I had installed both JDK and JRE   In my case  one jar file was being opened by double click while other was not being opened  I examined those files and the probable reason was that which was being opened  was created using JAVA SE 6 and the one not being opened was created using JAVA SE 7  Although  the problematic jar file was being run via command prompt  java -jar myfile jar    I tried Right Click -   Properties -  Change to javaw exe with both in JDK bin directory and JRE bin directory   I was finally able to fix the problem by changing javaw exe path  from JDK bin to JRE bin  in registry editor   Go to HKEY CLASSES ROOT jarfile shell open command  the value was    C  Program Files Java jdk-11 0 1 bin javaw exe  -jar   1       I changed it to    C  Program Files Java jre1 8 0 191 bin javaw exe  -jar   1       and it worked  Now the jar file can be opened by double click

User · Answer

It s not a file association problem since you can launch the application correctly through command line   The problem is when you double click on an associated file the application starts and runs with the file s path as base execution path  Any relative path will be computed from the file path and everything you try to load will probably be missing   Nothing happens  even if you surround all of your entry point code with try catch Exception  because java s throwing Throwables and not Exceptions  to fix this in your java entry point surround the content of the main method with a try catch Throwable   base class for Exception and Error  and debug

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If you have previously used the right click and opened with  path to your javaw exe then you will need to remove the following registry key    -HKEY CURRENT USER Software Microsoft Windows CurrentVersion Explorer FileExts  jar   Then run  C   gt assoc  jar jarfile C   gt ftype jarfile  C  path to your javaw exe  -jar   1

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If you try unpopular s answer      For Windows 7          Start  Control Panel    Click  Default Programs    Click  Associate a file type or protocol with a specific program    Double click  jar   Browse C  Program Files Java jre7 bin javaw exe   Click the button Open   Click the button OK      And jar files still fail to open  in my case it was like I never double clicked   open the Command Prompt  to be safe with admin rights enabled  and type the following commands   java -version This should return a version so you can safely assume java is installed   Then run  java -jar  PATHTOFILE FILENAME JAR   Read through the output generated   You may discover an error message

[java] How to run .jar file by double click on Windows 7 64-bit?

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