How to open run jar file double-click not working

Question

I can t open or run my  jar file   I just installed java  but I tried to open the  jar with other programs first  so the double-click defaults to something else and I can t change it back   java -jar myfile jar    Above command returns       java  is not recognized as an internal or external command  operable program or batch file    Is there a way I can still open run this   e  OS is Windows 8   Also  I downloaded the  jar file  didn t create it myself  if that s relevant  Not sure if it contains an executable  but I think it does

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Use cmd prompt and type  java -jar exapmple jar   To run your jar file   for more information refer to this link it describes how to properly open the jar file  https   superuser com questions 745112 how-do-i-run-a-jar-file-without-installing-java

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You may have several JDKs installed in your PC  Some older JDK installers also copy some java files such as java exe  javaw exe into C  Windows System32 folder  I had a similar issue  and searched the internet for a solution and none of the suggestions didn   t 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 - gt  Shortcut tab  Change the text in the target  for example  quot D  Dev JavaApp1 8 jar quot   To  quot C  Program Files Java jdk1 8 0 bin javaw exe quot  -jar  quot D  Dev JavaApp1 8 jar quot   Then click ok Double click the shortcut    It should now open the app

User · Answer

An easy way to execute  jar files is to create a batch file    Let s say you placed your jar file on your Desktop    echo OFF java -jar C  Users YourName Desktop myjar jar   Copy this code to a  txt file  modify  YourName  and save as  myjar bat   Then whenever you double click  the jar file will be executed  Hope this helps

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you can use the command prompt   javaw exe -jar yourfile jar   Hope it works for you

User · Answer

first of all  we have to make sure that you have downloaded and installed the JDK  In order to download it click on the following link  http   www oracle com technetwork java javase downloads jdk8-downloads-2133151 html   Do not forget to check  Accept License Agreement   before you choose the version you want to download   For Windows OS 32-Bit  x86  choose  jdk-8u77-windows-i586 exe   For Windows OS 64-Bit  x64  choose  jdk-8u77-windows-x64 exe   Install the file that is going to be downloaded  During the installation  pay attention  because you have to keep the installation path   When you have done so  the last thing to do  is to define two  Environment Variables    The first  Environmental Variable  name should be   JAVA HOME  and its value should be the installation path   for example  C  Program Files Java jdk1 8 0 77   The second  Environmental Variable  name should be   JRE HOME and its value should be the installation path   for example C  Program Files Java jre8   As soon as you have defined the Environment Variables  you can go to command prompt  cdm  and run from every path your preferred  java exe  commands  Your command line can now recognize your  java exe  commands        P S   In order to define  Environment Variable   make a right click on  This PC  and select  properties  from the menu  Then the  System  window will appear and you have to click on  Advanced system settings   As a consequence  System properties  window shows  Select the  Advanced  tab and click on  Environment Variables  button  You can now define the aforementioned variables and you re done

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I downloaded the latest JDK 7u10  Once you do that  try running your jar  It should execute

User · Answer

I was having this same issue for both Windows 8 and Windows Server 2012 configurations  I had installed the latest version of JDK Java 7 and had set my   JAVA HOME  system env variable to the jre folder   C  Program Files  x86  Java jre7   I also added the bin folder to my   Path   system env variable    JAVA HOME  bin   But I was still having problems with double clicking the executable jar files   I found another system env variable OPENDS JAVA ARGS that can be used to set the optional properties for javaw exe   So I added this variable and set it to  -jar  Now I am able to run the executable jar files when double clicking them

User · Answer

In cmd you can use the following   c  your directory your folder build gt java -jar yourFile jar    However  you need to create you  jar file on your project if you use Netbeans  How just go to Run - Clean and Build Project your project name   Also make sure you project properties Build- Packing has a yourFile jar and check Build JAR after Compiling     check Copy Depentent Libraries  Warning  Make sure your Environmental variables for Java are properly set   Old way to compile and run a Java File from the command prompt  cmd   Compiling  c   gt javac Myclass java Running  c   gt java com myPackage Myclass   I hope this info help

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In Netbeans please delete current you create the jar file and on the project explore of Netbeans please clean and build 2 or 3 times and right the project folder in project explore and build the jar file

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I had this problem a while back and the solution was really easy   Just uninstall the current version of Java  download an older one  then uninstall the older and install the latest again   For example  Java 8 Update 73 current install Java 7 Update 95   How it works  Java s registry keys were messed up  and when you install the older version they get fixed

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Go to your java directory  Copy this path C  Program Files Java jdk1 8 0 40 bin  Right click on my computer   click properties  then go to  Advanced system settings  click   Environment variables  go to  System variables  table  find an entry named  path   Double click it and go to the end  put a semicolon and paste your path  apply and ok  It should run now

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You must create a manifest file and specify your class that has the main method  you can build your jar file with manifest file as a parameter   jar cfm MyJar jar Manifest txt MyPackage   class  Manifest-Version  1 0  Archiver-Version  Plexus Archiver  Created-By  Apache Maven  Built-By  Cakes  Build-Jdk  1 6 0 04  Main-Class  com foo App

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Short trick  after I only REMOVED SPACES from names of the folders  where the  jar file was  double-clicked worked and the file executed

User · Answer

There are two different types of Java to download  The JDK  which is used to write Java programs  and the RE  runtime environment   which is used to actually run Java programs  Are you sure that you installed the RE instead of the SDK

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If the intention of the question is to view the contents of the JAR file  then the following java command would help    provided  JDK location is added to the environment variables   Windows Command prompt gt  jar tvf yourJarFile jar  Example  jar tvf log4j-extras-1 2 17 jar   Reference  http   docs oracle com javase tutorial deployment jar view html

[java] How to open/run .jar file (double-click not working)?

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