How to use this.saveConfig(); in a class besides the one that extends JavaPlugin?

How to use this.saveconfig in a separate class other then the one that extends javaplugin?

 

hankered

Constructors

 

make a static variable of the actual plugin and a getter method for it in the class that extends JavaPlugin.

so like private static Plugin plugin;

then in the onEnable { plugin = this; }

example of the getter:

public static Plugin getPlugin() {
return plugin;
}

then u can do MainClass.getPlugin().saveConfig();

 

GeorgeeeHD ZodiacTheories

Ah. You can also do:

Code:java

MainClass m = new MainClass();
m.saveConfig();

Thanks

 

GeorgeeeHD

Or that

 

https://forums.bukkit.org/threads/using-a-string-in-different-classes.184140/#post-1916182
https://forums.bukkit.org/threads/getting-a-boolean-from-another-class.218713/#post-2168376
https://forums.bukkit.org/threads/static-plugin-instance.197107/#post-2015647
https://forums.bukkit.org/threads/static-plugin-instance.197107/#post-2015952
https://forums.bukkit.org/threads/arraylists-not-working.245639/#post-2338265
https://forums.bukkit.org/threads/code-help-error-return.192943/#post-1982000
https://forums.bukkit.org/threads/s...n-using-multiple-classes.205991/#post-2083446
https://forums.bukkit.org/threads/config-file-null-pointer-exception.275624/#post-2545077
https://forums.bukkit.org/threads/plugin-cannot-be-null.232383/#post-2255775
http://forums.bukkit.org/threads/plugin-null.283589/#post-2603712
http://forums.bukkit.org/threads/plugin-null.283589/#post-2603765
http://forums.bukkit.org/threads/nullpointerexception-caused-by-economyresponse.283301/#post-2606124
http://forums.bukkit.org/threads/plugin-cannot-be-null.281536/#post-2589269
http://forums.bukkit.org/threads/checking-arraylist-in-another-class-help.279188/#post-2572942
https://forums.bukkit.org/threads/repeating-scheduler-in-another-class.192931/#post-1982574
https://forums.bukkit.org/threads/bukkit-runnables-not-working.199479/#post-2034260
https://forums.bukkit.org/threads/cant-get-stuff-from-main-to-another-class.230103/#post-2242088
(about 50 results omitted)

You don't need to use static, you shouldn't use static, and passing via constructor is the way it should be done.

You shouldn't be constructing a new instance of your main class, you will get errors.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I'd argue a case for the use of singleton design strategy, as discussed in the third link on the list.

 

Depending on the type of singleton, yes it can be appropriate. But the whole of your project should not be singletons. It creates coupling and makes your code unmanageable and unmodularized.

There's a reason why in most standards software engineering considers singletons an antipattern

 

1Rogue

i'm dumb. Then what should I use?

I've been doing:

Code:java

 
Main m = new Main();
FileConfiguration config = m.getConfig();
 

and it's been giving errors.

"File is null" errors. Is it because I'm constructing a new instance of the main class?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

hankered Don't construct a new instance of the main class. Look at dependency injection. Or use the many methods Bukkit provides for accessing your main class
JavaPlugin#getPlugin()
Bukkit.getPluginManager()#getPlugin()

 

hankered You should use the parameters in the constructors or methods.

 

Yes that is why you are getting errors. You can probably click just about any one of the links in my first post to find an answer.

http://docs.oracle.com/javase/tutorial/java/javaOO/constructors.html
It involves using java's constructors to pass a reference of the instance of your main class

Code:java

public class Example extends JavaPlugin {
 
    private AnotherClass another;
 
    public void onEnable() {
        this.another = new AnotherClass(this);
        this.another.doSomething();
    }
 
    public void phoneHome() {
        this.getLogger().log(Level.INFO, "Hello world!");
    }
 
}

Code:java

public class AnotherClass {
 
    private final Example project;
 
    public AnotherClass(Example project) {
        this.project = project;
    }
 
    public void doSomething() {
        this.project.phoneHome();
    }
 
}

Try running something like that, and see if you can pick up on how it works.

 

1Rogue

Code:java

 Main plugin;
public InteractListener (Main plugin) {
this.plugin = plugin;
}
    }

So now I can use plugin.getConfig(); ?

 

Yup! Though I would suggest adding "private final" modifiers to your field.

 

1Rogue

Alright thanks dude you're the best. I'll try it out now.