I need to execute a jar file on HP-UX that I am not supposed to modify.
I unpacked it using jd-gui and found out that I am failing cause in java there is a condition to check the os, leading to different directions for win, macos, freebds, openbds, gnu and so on.
I am quite sure everything would work if I would be able to make my unix command line reply freebds or openbds to the java call
System.getProperty("os.name")
once executed from a jar file like:
java -jar myjar.jar
is there a way to achieve this? some kind of compatibility mode or a way to preset that parameter.
You can use the -D switch to specify system properties. In my experiment this (unexpectedly) even worked with pre-defined ones like os.name. Therefore this should work:
java -Dos.name=linux -jar myjar.jar
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 <path>
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.
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.
Fixed
I just placed it in a different folder and it worked.
[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....
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.
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"
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.
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.
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
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
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
This worked for me.
cd /path/to/the/jar/
java -jar ./Calculator.jar
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.
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
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.
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
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"
To avoid any permission issues, try to run it as administrator. This worked for me on Win10.
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
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.
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
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!
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.
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 <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!
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.
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.
I was able to successfully create a .exe file from an executable jar. From Launch4j I can test the wrapper, and the output on the log is what I expect. However if I try to run the exe from the command line or from Windows Explorer, nothing happens. No error, no output to the console as expected. The program is also supposed to edit a text file which does happen when I run the jar using a batch file, but not when I run the exe. This is all on the same computer so I doubt it is a problem with the JRE. I have searched StackOverflow extensively but found nothing that helps with this situation. I did find this post with a similar problem: Launch4J executable not executing as expected but nobody actually answered the question. Thank you in advance for helping
I found the issue. Under Header, I had to switch the Header type from GUI to Console. After that I was able to run the exe.
You may be accepting something as a command line argument which may be throwing an error like in my case .
For my case, it was the tick on "Signle Instance" tab: Allow only a single instance of the application.
Although I had killed the process, for some unknown reason the exe had been recognized as alive. Thus, a reboot of the PC is recommended.
These are the things I had to do for it to work on Windows 10:
First, make sure the executable JAR you created actually executes. I could never got the JAR to execute by double-clicking. Instead, I created a .bat file where I added the java -jar command-line instruction to execute the jar, including the VM arguments. For example, to execute foo.jar, the .bat file should contain java -jar --module-path %FX_HOME% --add-modules javafx.controls,javafx.fxml foo.jar. Once you get the JAR to execute without errors (pay attention to the command prompt window), then your JAR is ready. Then, do the following from the Launch4J app:
Create FX_HOME environment variable. Make sure it points to the lib folder of the downloaded Java FX distribution is located.*
Set JAVA_HOME environment variable.*
Make sure JAVA_HOME is the first entry on the Path variable. Verify by opening a command prompt and typing where java and hitting the ENTER key.
Under Header, make sure "GUI" is selected.
Under JRE, set Bundled JRE paths to %JAVA_HOME%.
Under VM Option, enter --module-path %FX_HOME% --add-modules javafx.controls,javafx.fxml
*If any of the paths contain spaces, make sure they are in quotes when you create the environment variable. For example: C:\Program Files\Java 17\bin, should be in quotes. This is because the command-line parameters are space-delimited and "Program Files" contains a space, fooling the command-line interpreter to think Program is the end of one parameter and Files is the beginning of another. By putting in quotes, the interpreter now knows the space is part of that single parameter that represents the path.
I am trying to do "javac Classname.java" from cmd prompt, and this Classname.java requires Jfreechart libraries/jars, and runs fine if compiled from Eclipse (because project package has jars imported).
But I want to run the file from cmd prompt and its not able to show me the output. It comes with errors like: ("package doesn't exist"), how to fix it? I need the class file and also run JNI commands to create header file.
You need to set the classpath.
You can do this in 2 ways. Either use the -classpath or -cp option:
javac -cp jar1.jar;path/to/jar2.jar Classname.java
Or, if you need it to persist, use the CLASSPATH environmental variable:
set CLASSPATH=path1;path2
javac Classname.java
If you have already managed to run your code in Eclipse, then Eclipse can help you.
In the "Debug" view, you should have something like this remaining after you have run your code:
If you right-click the bottom "terminated" text and select "Properties", you will get something like this:
You can copy the command line content and use that to run your app from the command line, or use it to set the classpath as the other answers have advised.
You just need to add the directory paths and/or .jar libraries to your "-classpath" command-line argument.
Depending on how many libraries you've got, you might well wind up with a .sh script (Linux) or .cmd file (windows) that looks something like this:
http://ubuntuforums.org/showthread.php?t=230258
java -cp jts.jar:jcommon-1.0.0.jar:jfreechart-1.0.0.jar:jhall.jar:other.jar:rss.jar -Xmx256M jclient.LoginFrame .
If you're on Windows, you'd use ";" as a separator (instead of *nix ":").
'Hope that helps!
I'm using gvim as my main 'IDE' on windows 7 and I would like to use ctags to navigate through the code. I've downloaded it and ran based on this tutorial: http://www.techrepublic.com/article/configure-vi-for-java-application-development/5054618
ctags -f ~/.tags -R ~/myprojects/src $JAVA_HOME/src
I've then setup my vimrc with...
set tags=~/.tags
However when I do Ctrl+] on a keyword, it says it can not find the file which the tag is defined in. Shows the correct path except it misses out c:\ from the start so vim can't load it.
How can get it to give me the correct path?
I'm using the latest version of gvim and ctags.
Thanks
FWITW, I'm not entirely sold on the concept of keeping my tags in one location.
This part of the command call:
-f ~/.tags
Nor would I hard path to my current project. This part:
-R ~/myprojects/src
BTW, Windows doesn't have ~ so I don't think either of those would work (not sure if Vim will find ~, i.e. "home").
If I were you, I would cut my teeth on the simplest method until you get more comfortable with the Vim methods and ideals.
Easiest method:
Always let Vim know the "Current Directory" (making the assumption that you are not launching Vim via the command prompt). When you open a file always set the current directory by issuing the following command from normal mode:
:cd %:p:h
Generate a tag file in the current directory with the following command (from normal mode).
:!ctags -R .
Happy jumping.