Cannot launch Java file "xxx.jar"

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Level 1

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Cannot launch Java file "xxx.jar"

I have a java app created by my colleague at work. Our industry has been Windoze dominated for ever, and some of us want to make our software cross-platform. My colleague (a Windows guy) created this Java utility for our customers. IT IS SAFE!!! I could literally slap the guy who wrote it if it isn't.

When I try to launch this on my personal iMac, it fails. The error message says: The Java JAR file "xxxProgramxxx.jar" could not be launched. Check the Console for possible error messages.

I attached a screenshot of the error message and relevant Console output. The Console output goes WAY over my head. What the **** is Sandbox?

2020 27" iMac running Catalina 10.15.7

iMac 27″, macOS 10.15

Posted on Oct 23, 2020 8:58 PM

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Answer 1

Top-ranking reply

Barney-15E

Level 10

122,324 points

Oct 24, 2020 12:56 PM in response to howard4ap

In Terminal, you need to call the java app which is inside the Java Home for that version. The top level folder is /Library/Java/JavaVirtualMachines.

The home folder is in a folder named for the version.

You can use java_home to locate a home by version. If you have only the one version, you can use this to run that version of java.

`/usr/libexec/java_home`/bin/java -jar xxxxLoader.jar

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Answer 2

Barney-15E

Level 10

122,324 points

Oct 24, 2020 5:02 AM in response to howard4ap

Did you try ctrl-clicking on it and choose Open?

You might also try launching it from the command line. What version of Java do you have installed?

A sandbox is where apps can play safely by themselves without affecting other apps or other apps affecting them.

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Answer 3

howard4ap Author

Level 1

9 points

Oct 24, 2020 9:22 AM in response to howard4ap

I should add: this same xxxxLoader.jar app runs great on Windows.

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Answer 4

howard4ap Author

Level 1

9 points

Oct 24, 2020 9:08 AM in response to Barney-15E

Yes to ctrl-clicking and choosing Open. Also tried ctrl-click -> Open With -> Jar Launcher.app.

I have the latest Java Version 8 Update 271 (build 1.8.0_271-b09)

I have had no luck from the command line either, although I confess knowing nothing about using the command. line in OS X. This is what I entered: % open ~/Documents/TEMP-2020-1023/xxxxx_External_Loader_Full_Load_V3/xxxxLoader.jar

The response was that the file did not exist. I double and triple checked the path and filename.

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Cannot launch Java file "xxx.jar"

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