Matlab 2015a Java error after fresh installation?

Hi everyone,

after fresh Matlab installation on win8.1 64bit i get following fatal error on startup:

java exeption occured java.lang.noClassDefFoundError: Could not initialize class sun.awt.Win32FontManager

... ...

can anyone help me?

Answer 1

[Anusha B]

Hi,

1. You can try executing the following commands:

restoredefaultpath
rehash toolboxcache

2. A corrupt installation may also be a cause of the issue.

[Filippo Desantis]

Hi, I have the same problem but your solution unfortunately didn't resolve, instead a new warning appeared, "Warning: Function sim has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict." could you help me ?

Answer 2

[ALI]

Hi Anusha,

MATLAB is giving that java error message at statup..

I just see matlab logo and error message.

How can I execute 1. restoredefaultpath 2. rehash toolboxcache?

Sincerely,

[Cedric Girerd]

Hi there!

Could you tell me how you solved your problem? I have the same issue at the moment, and can't manage to find a solution. Don't have access to Matlab either, so no way for me to run some commands in it.

Best,

[Gioele Luca Monopoli]

did you find a solution

Answer 3

[Ralph Gunderson]

Using the Command Prompt, you can navigate to your matlab installaton folder and launch Matlab without the desktop using

matlab -nodesktop

Then you can execute the commands from the Matlab command line interface. I am having the same problem as you, and folllowed this suggestion. However, Matlab will still not open.

Answer 4

[Malek Ben Alaya]

has anyone found a solution please ????

Answer 5

[yoshiki watanabe]

I found similar error (NOT exactly same as the above error) on MATLAB 2022a, and resolved. On my situation, that error is because of existence of old version of MATLAB. After I deleted the old version, my new version of MATLAB worked.