Java Non-static variable cannot be referenced from a static context

[JLeger91]

I'm trying to use a variable from one class file inside another class file.
The original variable is public boolean keyFound = false;
When I try to access the variable I use Event01.keyFound;
it gives me an error. I tried using a getter method that returns this.keyFound and it gives me the same error only it says non-static method cannot be referenced from a static context.

 

[Antero360]

I'm trying to use a variable from one class file inside another class file.
The original variable is public boolean keyFound = false;
When I try to access the variable I use Event01.keyFound;
it gives me an error. I tried using a getter method that returns this.keyFound and it gives me the same error only it says non-static method cannot be referenced from a static context.

simple solution to this: just add the 'static' keyword to your variable, OR, rather than making it a global variable make it a local variable

 

[JLeger91]

Thank you. That gets the variable working. I now have a bigger problem with the code where it worked yesterday, now it gives me an error saying:

Exception in thread "main" java.lang.NoClassDefFoundError: awesomequest3/UI
at awesomequest3.GameManager.<init>(GameManager.java:10)
at awesomequest3.GameManager.main(GameManager.java:18)
Caused by: java.lang.ClassNotFoundException: awesomequest3.UI

I've been following this tutorial:

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and it worked yesterday:

AwesomeQuest3

 

[Deleted member 2829]

I think you need to have import UI; at the beginning of GameManager.java. Although that does not sit well with your claim that it worked yesterday. What have you changed since yesterday then, apart from implementing @Antero360 's suggestion ?

 

[JLeger91]

I think you need to have import UI; at the beginning of GameManager.java. Although that does not sit well with your claim that it worked yesterday. What have you changed since yesterday then, apart from implementing @Antero360 's suggestion ?

Amazingly I moved the event03 and event02 out of the project folder and commented out the code and the game worked. Then I put the code and files back in and it works. An unplug it and plug it back in fix :/
Also I was able to access the non-static variable by using gm.ev1.keyFound so it doesn't have to be global
The key from screen 1 can now be used on screen 3 and the game works. Thank you for the help @cbreemer and @Antero360

 

[Deleted member 2829]

That is quite baffling... but stranger things happen 😀
Good that you gave up on the global. When you need to access stuff from another class, best use a getter/setter function.

 

[Antero360]

Amazingly I moved the event03 and event02 out of the project folder and commented out the code and the game worked. Then I put the code and files back in and it works. An unplug it and plug it back in fix :/
Also I was able to access the non-static variable by using gm.ev1.keyFound so it doesn't have to be global
The key from screen 1 can now be used on screen 3 and the game works. Thank you for the help @cbreemer and @Antero360

Step 0: sir/ma'am, have you unplugged it and plugged it back in? lol

 

[Deleted member 2829]

When in doubt, reboot 🤣