.jar Files

[CrazySnake96]

Hey guys i have the latest Java installed but when i try to open a .jar file it opens then immediately closes, I tried a complete reinstall of java but its not working, if you guys have any ideas it would be greatly apreciated

[The King of the Undead]

specs? OS?

[Eigenvektor]

1 minute ago, CrazySnake96 said:

Hey guys i have the latest Java installed but when i try to open a .jar file it opens then immediately closes, I tried a complete reinstall of java but its not working, if you guys have any ideas it would be greatly apreciated

How do you open them, are you trying to double-click? Have you tried something like this on the command line:

java -jar <filename.jar>

 

[CrazySnake96]

windows 10 pro
Ryzen 7 2700X
Aorus x470 gaming 5
16GB DDR4
RTX 2080 ROG STRIX

[CrazySnake96]

[The King of the Undead]

try running as admin.

[Eigenvektor]

Try running the jar-file from the command line. The command line window should stay open, so you can hopefully see what the issue is. For example, it's possible the Java-program was written for an older version of Java and is not compatible with the latest version.

[Eigenvektor]

1 minute ago, CrazySnake96 said:

Is the jar-file located in that directory? You may need to "cd" into that directory first before you do that.

[CrazySnake96]

no its located in my downloads folder

[Eigenvektor]

Just now, CrazySnake96 said:

no its located in my downloads folder

Well, then open the command line in that directory. Meaning, open command line, then

cd C:\Users\fater\Downloads

then try the java -jar command again.

[CrazySnake96]

ok update it works if i do it via cmd but why dosnt it work normally?

[Eigenvektor]

2 minutes ago, CrazySnake96 said:

ok update it works if i do it via cmd but why dosnt it work normally?

That is "normal" for a Java-app You can't just double-click to start them, because Windows doesn't know what to do with it.

 

~edit: There is a way to get it to work with double-click, by teaching Windows what to do:

assoc .jar=jarfile
ftype jarfile="C:\path\to\your\java.exe" -jar "%1" %*

You need to enter these two commands on the command line, and replace "C:\path\to\your\java.exe" with the correct path to "java.exe"

[CrazySnake96]

thats just dumb but ok lol thanks for the help ^-^

[wasab]

4 hours ago, Eigenvektor said:

That is "normal" for a Java-app You can't just double-click to start them, because Windows doesn't know what to do with it.

 

~edit: There is a way to get it to work with double-click, by teaching Windows what to do:

assoc .jar=jarfile
ftype jarfile="C:\path\to\your\java.exe" -jar "%1" %*

You need to enter these two commands on the command line, and replace "C:\path\to\your\java.exe" with the correct path to "java.exe"

you can, it works on my linux machine for jfx apps. You just need to set the default action for files with .jar extensions similar to how you set a default video player. 

[Eigenvektor]

5 hours ago, wasab said:

you can, it works on my linux machine for jfx apps. You just need to set the default action for files with .jar extensions similar to how you set a default video player. 

That's exactly what the "assoc" and "ftype" commands to, they set a default action for .jar files ;)

[Kisai]

11 hours ago, CrazySnake96 said:

Hey guys i have the latest Java installed but when i try to open a .jar file it opens then immediately closes, I tried a complete reinstall of java but its not working, if you guys have any ideas it would be greatly apreciated

Jar files are Zip files. They're not executable binaries.

 

You either run them from the command line, or you create a shortcut that calls the JRE with the .JAR as a parameter.

 

"C:\path\to\javaw.exe" -jar "C:\path\to\jar\myExecutableJar.jar"