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[1.12] How can I get the list of dimensions


Taskkill

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I wanna get a list of dimensions. So I tried DimensionManager.getStaticDimensionIDs(), but it doesn't work. It throws "java.lang.NullPointerException"

And I tried another way that from diesieben07,but it still can't work and my eclipse tell me that "Type mismatch: cannot convert from IntStream to int[]". 

 

Edited by Taskkill
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1 minute ago, Animefan8888 said:

Post your code.

package TCr.Dark.items;

import java.util.stream.Stream;

import TCr.Dark.Dark;
import net.minecraft.client.resources.I18n;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Biomes;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.ActionResult;
import net.minecraft.util.EnumHand;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.world.DimensionType;
import net.minecraft.world.World;
import net.minecraftforge.common.DimensionManager;

public class DimensionWand extends Item {

	public DimensionWand() {
		this.setUnlocalizedName("DimensionWand");
		this.setRegistryName("dimension_wand");
		this.setCreativeTab(Dark.tab);
		this.setMaxDamage(20);
	}
	
	@Override
	public ActionResult<ItemStack> onItemRightClick(World worldIn, EntityPlayer playerIn, EnumHand handIn) {
		if(!worldIn.isRemote) {
			NBTTagCompound nbt = playerIn.getHeldItem(handIn).getTagCompound();
			int[] dimensions = Stream.of(DimensionType.values()).flatMapToInt(t -> Stream.of(DimensionManager.getDimensions(t))).distinct();
			int max = dimensions.length;
			if(playerIn.isSneaking()) {
				playerIn.changeDimension(nbt.getInteger("dimension"));
			} else {
				int k = 0;
				k++;
				if(k > max) k = 0;
				nbt.setInteger("dimension", dimensions[k]);
				playerIn.sendMessage(new TextComponentString(I18n.format("dimensionWand.dim")+dimensions[k]));
			}
		}
		return super.onItemRightClick(worldIn, playerIn, handIn);
	}
	
}

 

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Just now, Animefan8888 said:

And the crash for this code.

It didn't crash, just throw this.

[23:19:24] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_151]
	at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_151]
	at net.minecraft.util.Util.runTask(Util.java:54) [Util.class:?]
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:796) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:741) [MinecraftServer.class:?]
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192) [IntegratedServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:590) [MinecraftServer.class:?]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_151]
Caused by: java.lang.NullPointerException
	at TCr.Dark.items.DimensionWand.onItemRightClick(DimensionWand.java:34) ~[DimensionWand.class:?]
	at net.minecraft.item.ItemStack.useItemRightClick(ItemStack.java:234) ~[ItemStack.class:?]
	at net.minecraft.server.management.PlayerInteractionManager.processRightClick(PlayerInteractionManager.java:384) ~[PlayerInteractionManager.class:?]
	at net.minecraft.network.NetHandlerPlayServer.processTryUseItem(NetHandlerPlayServer.java:794) ~[NetHandlerPlayServer.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItem.processPacket(CPacketPlayerTryUseItem.java:43) ~[CPacketPlayerTryUseItem.class:?]
	at net.minecraft.network.play.client.CPacketPlayerTryUseItem.processPacket(CPacketPlayerTryUseItem.java:9) ~[CPacketPlayerTryUseItem.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:21) ~[PacketThreadUtil$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_151]
	at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_151]
	at net.minecraft.util.Util.runTask(Util.java:53) ~[Util.class:?]
	... 5 more

 

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14 minutes ago, Taskkill said:

DimensionWand.java:34

Which line is line 34?

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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9 minutes ago, Taskkill said:

Thanks, but how can I turn this Map into int array. 

 

Although diesieben07s flatmap approach should work, it is good to understand what you're doing. This is really just basic Java. You have a map and it has keys of DimensionType and values of IntSortedSet. If you think about what that means, there is a set of ints (i.e. dimension ids) for each dimension type.

 

So the logical way to turn this into an array of ints is to iterate through the map (i.e. loop through each DimensionType) and then take the value int set and iterate through that, putting each element into your array.

 

Edited by jabelar

Check out my tutorials here: http://jabelarminecraft.blogspot.com/

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17 minutes ago, jabelar said:

 

Although diesieben07s flatmap approach should work, it is good to understand what you're doing. This is really just basic Java. You have a map and it has keys of DimensionType and values of IntSortedSet. If you think about what that means, there is a set of ints (i.e. dimension ids) for each dimension type.

 

So the logical way to turn this into an array of ints is to iterate through the map (i.e. loop through each DimensionType) and then take the value int set and iterate through that, putting each element into your array.

 

I know that is basic java, but I just know a little about Map, so... But thanks!

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20 minutes ago, diesieben07 said:

A big part of functional programming is declarative programming: Stating what result you want, not how to get there. And since functional programming is all the rage, so obviously everyone should use it all the time. Just saying. ? Seriously though, it's 2018. Nobody should be manually iterating arrays, unless you are writing like... a video encoder.

I agree except ... people need to understand what is going on underneath. It is great if there is already a method for flattening collections, but I don't think it really helps understand the underlying construction of the data. The question posted indicated he didn't really even know what a map is.

Edited by jabelar
  • Like 1

Check out my tutorials here: http://jabelarminecraft.blogspot.com/

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