I'm working on a 1.8 mod, and I'm having trouble setting and getting blocks. What I'm trying to do is spawn an entity when a chest is right clicked, but I can't figure out how to do it. Here is how I'd do it prior to 1.8:

public class ModEventHandler {
@SubscribeEvent
public void interact(PlayerInteractEvent event) {
	Action action = event.action;
	EntityPlayer player = event.entityPlayer;
	World world = player.worldObj;
	Block block = world.getBlock(event.x, event.y, event.z);

	if(action.RIGHT_CLICK_BLOCK != null) {
		if(event.world.getBlock(event.x, event.y, event.z) == Blocks.chest) {
			if(!world.isRemote) {
				EntityZombie entity = new EntityZombie(world);
				entity.setPosition(event.x, event.y + 2, event.z);
				world.spawnEntityInWorld(entity);
				world.setBlock(event.x, event.y, event.z, Blocks.bedrock);
			}
		}
	}
}
}

 

But I'm not sure how to accomplish this in 1.8, as there are no setBlock/getBlock methods.

 

How can I do this?

You can use World.getBlockState(blockPos).getBlock() to get a block, and World.setBlockState(blockPos, yourBlock.getDefaultState()) to set a block.

That successfully sets the block and summons the entity, but if I right click anything but a chest, even air, it crashes, saying this:

 

[13:29:37] [Client thread/FATAL]: Unreported exception thrown!

java.lang.NullPointerException

at net.minecraft.world.World.isValid(World.java:260) ~[World.class:?]

at net.minecraft.world.World.getBlockState(World.java:896) ~[World.class:?]

at com.davethemodder.herobrine.ModEventHandler.interact(ModEventHandler.java:19) ~[ModEventHandler.class:?]

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_ModEventHandler_interact_PlayerInteractEvent.invoke(.dynamic) ~[?:?]

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55) ~[ASMEventHandler.class:?]

at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:138) ~[EventBus.class:?]

at net.minecraftforge.event.ForgeEventFactory.onPlayerInteract(ForgeEventFactory.java:121) ~[ForgeEventFactory.class:?]

at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1599) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.runTick(Minecraft.java:2131) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1087) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:376) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:117) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_45]

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_45]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_45]

at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_45]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]

at GradleStart.main(Unknown Source) [start/:?]

[13:29:37] [Client thread/INFO] [sTDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:663]: ---- Minecraft Crash Report ----

// I feel sad now

 

Time: 7/15/15 1:29 PM

Description: Unexpected error

 

java.lang.NullPointerException: Unexpected error

at net.minecraft.world.World.isValid(World.java:260)

at net.minecraft.world.World.getBlockState(World.java:896)

at com.davethemodder.herobrine.ModEventHandler.interact(ModEventHandler.java:19)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_ModEventHandler_interact_PlayerInteractEvent.invoke(.dynamic)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)

at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:138)

at net.minecraftforge.event.ForgeEventFactory.onPlayerInteract(ForgeEventFactory.java:121)

at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1599)

at net.minecraft.client.Minecraft.runTick(Minecraft.java:2131)

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1087)

at net.minecraft.client.Minecraft.run(Minecraft.java:376)

at net.minecraft.client.main.Main.main(Main.java:117)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source)

at GradleStart.main(Unknown Source)

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- Head --

Stacktrace:

at net.minecraft.world.World.isValid(World.java:260)

at net.minecraft.world.World.getBlockState(World.java:896)

at com.davethemodder.herobrine.ModEventHandler.interact(ModEventHandler.java:19)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_ModEventHandler_interact_PlayerInteractEvent.invoke(.dynamic)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:55)

at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:138)

at net.minecraftforge.event.ForgeEventFactory.onPlayerInteract(ForgeEventFactory.java:121)

at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1599)

 

 

I got rid of the part where it checks to make sure block != null, and it still gives me the error

 

Here's my code:

<code>public class ModEventHandler {

@SubscribeEvent

public void interact(PlayerInteractEvent event) {

Action action = event.action;

EntityPlayer player = event.entityPlayer;

World world = player.worldObj;

Block block = world.getBlockState(event.pos).getBlock();

 

if(action.RIGHT_CLICK_BLOCK != null) {

 

System.out.println("UUUUUUUUUUU");

if(block == Blocks.chest) {

if(!world.isRemote) {

EntityZombie entity = new EntityZombie(world);

entity.setPosition(player.posX, player.posY + 2, player.posZ);

world.spawnEntityInWorld(entity);

world.setBlockState(event.pos, Blocks.bedrock.getDefaultState());

}

}

}

}

}</code>

 

Ok, I changed it to this:

<code>public class ModEventHandler {

@SubscribeEvent

public void interact(PlayerInteractEvent event) {

Action action = event.action;

EntityPlayer player = event.entityPlayer;

World world = player.worldObj;

Block block = world.getBlockState(event.pos).getBlock();

 

if(action != event.action.RIGHT_CLICK_AIR) {

if(action == event.action.RIGHT_CLICK_BLOCK) {

System.out.println("UUUUUUUUUUU");

if(block == Blocks.chest) {

if(!world.isRemote) {

EntityZombie entity = new EntityZombie(world);

entity.setPosition(player.posX, player.posY + 2, player.posZ);

world.spawnEntityInWorld(entity);

world.setBlockState(event.pos, Blocks.bedrock.getDefaultState());

}

}

}

}

}

}</code>

 

And it still gives me the same error. It directs me to the line where I define the block variable.

 

EDIT: Oh. Derp. Don't answer this yet.