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For loops in event handlers


theishiopian

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Show what you tried.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

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@SubscribeEvent
	public void blockBreak(HarvestDropsEvent event)
	{
		World world = event.getWorld();
		if(!world.isRemote)
		{
			ForageTable table = ForageCraftMod.ForageDict.get(event.getState().getBlock());
			
			java.util.List<ForagePool> pools = table.getPools();
			
			for(int i = 0; i != pools.size(); i++)
			{
				ForagePool pool = table.getPool(i);
				
				if(CHANCE.nextFloat()<pool.getChance())
				{
					event.getDrops().add(new ItemStack(ForgeRegistries.ITEMS.getValue(new ResourceLocation(pool.getItem())), pool.getAmount()));
				}
			}
		}
	}

ForageDict is a hashtable using blocks as keys and returning a foragetable object. foragetables are containers for lists of foragepools, which hold a set of primitive values for use in this code, which adds new drops to blocks via json files.

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Quote

Caused by: java.lang.NullPointerException

Its on line 31, whichever line that is.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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4 minutes ago, Draco18s said:

Its on line 31, whichever line that is.

Don't you mean 33?

Quote
Caused by: java.lang.NullPointerException

    at com.theishiopian.foragecraft.handler.BlockForageHandler.blockBreak(BlockForageHandler.java:33)

 

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

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Forge and vanilla BlockState generator.

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Then table.getPools(); returned null and you didn't check for that.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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5 minutes ago, theishiopian said:

this.table

Which must never be instantiated into an instance.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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1 minute ago, theishiopian said:

SO, for clarification, are there no problems with using for loops in event handlers?

No there isn't. 

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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A tip for combatting NPEs is to make everything that possibly can be final final. Then the compiler will let you know if you forgot to initialise your field.

Step through your code with the debugger and find out why it’s null

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Thanks for the tip. Im going to massively refactor this tomorrow. Ill also step through it with the debugger. I think it has to do with the way im creating the forage pools from json. Which is odd because it worked before. If i have any more issues tommorow, ill create a new thread. Night all.

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27 minutes ago, theishiopian said:

Also, what did you mean by "instantiated into an instance"? Do you mean initilized as an object? If so, I'm already doing that.

 


ForageTable table = ForageCraftMod.ForageDict.get(event.getState().getBlock());

 

What if that block doesnt have a ForageTable? Also why are you using a Block and not a IBlockState for your key.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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18 minutes ago, theishiopian said:

I hadnt considered using blockstates. Do they have a string representation like blocks do? (eg minecraft:dirt)

Not an explicit one. It would first specify the Block I'd "minecraft:dirt" and then it would specify the property name and then the value, both can be represented by strings.

VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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9 hours ago, theishiopian said:

Do they have a string representation like blocks do? (eg minecraft:dirt)

Its almost as if you've not actually played the game.

1) The F3 screen

2) The /give command

3) Blockstate JSON files (and the associated error messages when they aren't correct)

 

All three of these use string representations of blockstates.

 

Or there's just the sheer point that: anything can be turned into a string if you try hard enough.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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