Java error: Could not find or load main class - Netbeans IDE

Question

So I was making a java program in Netbeans IDE 8.2 and when I tried to run it, I got this error:

Error: Could not find or load main class helloworld.HelloWorld
C:\Users\name\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 1 second)

(Assume that helloworld is my project name and HelloWorld is my class name)

Everything was fine before, and I can't think of what I did that would cause this error to happen. This is the first time this error has happened to me so I don't know what to do. The code doesn't seem to have any errors.

Other projects of mine seemed to also have the exact same problem even though I haven't opened or edited them in weeks prior to this error occurring.

I tried many other ways but none of them seems to do the trick. Including deleting the cache folder and setting the main class through the properties tab.

Here's a screenshot of my code with the error, my name is crossed out: Even if I type my code directly in the main class, which is class6homework.java, the error still occurs but it says class6homework.class6homework instead of the one in the screenshot.

Any ideas on how I could fix this?

UPDATE: I got it to work by moving the folder that contains the project to my desktop, didn't know why it wouldn't work in my original location. Thanks for the help.

Can you upload the code? please provide more details... – Alexandros Kourtis Aug 16 '20 at 15:33 — Alexandros Kourtis, Aug 16 '20 at 15:33

score 1 · Answer 1 · answered Aug 16 '20 at 15:18

1

Perhaps you don't have the main method included. If that is not the problem, try right clicking your class in the project tree and look for an option that says "Set as main class" or something like that

answered Aug 16 '20 at 15:18

gabopushups

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Don't seem to find the set main class option. I already set the main class through project tab > properties > run and that didn't seem to fix the problem. – supreme_leader Aug 16 '20 at 15:26
have you checked that you have the correct package name in your main class – Alexandros Kourtis Aug 16 '20 at 15:45
Yeah, I am sure that I have the correct package name in my main class. – supreme_leader Aug 16 '20 at 15:55
Did you fix it? – Alexandros Kourtis Aug 17 '20 at 03:59
Unfortunately, not yet, I am gonna look for some more ways. – supreme_leader Aug 17 '20 at 21:45

Alexandros Kourtis · Answer 2 · 2020-08-17T07:55:47.617

0

Possible Fixes:

Fix 1

Go to project properties (right click on the folder of your project in netbeans)
On left tab where it shows the categories, click on the "Run" selection
Then click on Browse to find the Main class you use on your project

Fix 2

Go to C:\Users\name\AppData\Local\Netbeans
delete the Cache folder.
Rebuild and Run

Fix 3 Download most recent version of Netbeans

Fix 4 Download most recent version of JDK and configure Netbeans to use that

edited Aug 17 '20 at 07:55

answered Aug 16 '20 at 15:41

Alexandros Kourtis

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Already tried that, didn't fix the error, even after I clean and build the project. – supreme_leader Aug 16 '20 at 15:56
Tried the second fix, it still didn't fix the error. – supreme_leader Aug 16 '20 at 16:42
Do you have only one main method? or a main method in each class... sorry for dumb question... im just asking – Alexandros Kourtis Aug 16 '20 at 16:45
please take a look: https://stackoverflow.com/questions/20034377/netbeans-error-could-not-find-or-load-main-class – Alexandros Kourtis Aug 16 '20 at 16:46
Also this: https://superuser.com/questions/1401388/netbeans-ide-8-0-2-error-could-not-find-or-load-main-class-logindb-logindb ... The guy said he fixed the problem when he moved the location of the file. – Alexandros Kourtis Aug 16 '20 at 16:50
Make sure vm options at run menu in project properties is empty. – Alexandros Kourtis Aug 16 '20 at 16:51
Ok I will take a look. – supreme_leader Aug 17 '20 at 21:45

Java error: Could not find or load main class - Netbeans IDE

2 Answers2