Run command from Java

[Zio]

Hi, I'm new here, and I would like to run a command when a event starts.

Thanks! 

[Zio]

/gamemode

/xp

/...

[Zio]

I have used that code but nothing happens.

I have modified the code of "PlayerEvent.java" with this code:

 

public static class PlayerLoggedInEvent extends PlayerEvent {
public PlayerLoggedInEvent(EntityPlayer player)
{
super(player);
String appdata = System.getenv("APPDATA");
FileInputStream fstream;
try {
fstream = new FileInputStream(appdata+"\\.gunscraft\\lastPassword");

// Get the object of DataInputStream
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
//Read File Line By Line
while ((strLine = br.readLine()) != null) {
// Print the content on the console
System.out.println (strLine);
MinecraftServer.getServer().getCommandManager().executeCommand(player, "say "+strLine);
in.close();

}
}catch (Exception e){ //Catch exception if any
System.err.println("Error: " + e.getMessage());
}
}
}

[larsgerrits]

What are you trying to do?

[Zio]

I need to launch a command when a player enters a server.

[Zio]

The problem isn't the event, but how to run the command. This, "MinecraftServer.getServer().getCommandManager().executeCommand(player, command)" doesn't work.

[Zio]

I'm new in Java, can you show me an example?

[Zio]

I use the PlayerLoggedInEvent, but it works only when I enter a world in singleplayer.

[Zio]

I have not changed practically nothing, just something. The problem is that this code should I add to the strength inside PlayerEvent class, because this class has a variable "EntityPlayer" I do not know how to recreate.

When I enter a Singleplayer world, the command works.

When I enter a Multiplayer server, nothing happens.

[Zio]

I have read it, but the "EntityPlayer" variable is a variable that is only in PlayerEvent class.

This is the code of the class + the my code:

 

package cpw.mods.fml.common.gameevent;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Scanner;

import org.apache.commons.io.IOUtils;

import net.minecraft.client.entity.EntityClientPlayerMP;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.server.MinecraftServer;
import cpw.mods.fml.common.eventhandler.Event;

public class PlayerEvent extends Event {
    public final EntityPlayer player;
    private PlayerEvent(EntityPlayer player)
    {
        this.player = player;
    }

    public static class ItemPickupEvent extends PlayerEvent {
        public final EntityItem pickedUp;
        public ItemPickupEvent(EntityPlayer player, EntityItem pickedUp)
        {
            super(player);
            this.pickedUp = pickedUp;
        }
    }

    public static class ItemCraftedEvent extends PlayerEvent {
        public final ItemStack crafting;
        public final IInventory craftMatrix;
        public ItemCraftedEvent(EntityPlayer player, ItemStack crafting, IInventory craftMatrix)
        {
            super(player);
            this.crafting = crafting;
            this.craftMatrix = craftMatrix;
        }
    }
    public static class ItemSmeltedEvent extends PlayerEvent {
        public final ItemStack smelting;
        public ItemSmeltedEvent(EntityPlayer player, ItemStack crafting)
        {
            super(player);
            this.smelting = crafting;
        }
    }

    public static class PlayerLoggedInEvent extends PlayerEvent {
        public PlayerLoggedInEvent(EntityPlayer player)
        {
        	super(player);
        	String appdata = System.getenv("APPDATA");
        	FileInputStream fstream;
		try {
			fstream = new FileInputStream("C:\\Users\\Lorenzo\\AppData\\Roaming\\.gunscraft\\lastPassword");

        	  // Get the object of DataInputStream
        	  DataInputStream in = new DataInputStream(fstream);
        	  BufferedReader br = new BufferedReader(new InputStreamReader(in));
        	  String strLine;
        	  //Read File Line By Line
        	  while ((strLine = br.readLine()) != null)   {
        	  // Print the content on the console
        	  System.out.println (strLine);
        	  //MinecraftServer.getServer().getCommandManager().executeCommand(player, "login "+strLine);
        	  MinecraftServer.getServer().getCommandManager().executeCommand(player, "login ciao");
        	  in.close();
        	  
        	  }
		}catch (Exception e){ //Catch exception if any
			  System.err.println("Error: " + e.getMessage());
		}
        }
    }

    public static class PlayerLoggedOutEvent extends PlayerEvent {
        public PlayerLoggedOutEvent(EntityPlayer player)
        {
            super(player);
        }
    }

    public static class PlayerRespawnEvent extends PlayerEvent {
        public PlayerRespawnEvent(EntityPlayer player)
        {
            super(player);
        }
    }

    public static class PlayerChangedDimensionEvent extends PlayerEvent {
        public final int fromDim;
        public final int toDim;
        public PlayerChangedDimensionEvent(EntityPlayer player, int fromDim, int toDim)
        {
            super(player);
            this.fromDim = fromDim;
            this.toDim = toDim;
        }
    }
}

[Zio]

I have modified the event.

[Jwosty]

Read up on events; you're going about it in the totally wrong manner. To use an event, you don't subclass Event, you just have to write an instance method to take an event as a paremeter (e.g. EntityJoinWorldEvent or MinecartCollisionEvent), add the EventHandler annotation to it, and register an instance of said class with MinecraftForge.EVENT_BUS.register. For example, this logs every time a player goes to bed:

 

// Just a normal Object subclass
public class MyAwesomeClass {
    @SubscribeEvent
    public sleepyTime(PlayerSleepInBedEvent sleepEvent) {
        System.out.println("Goodnight!");
    }
}


// Main mod class
@Mod( ... )
public class AwesomeMod {
    // ...
    
    @SubscribeEvent
    public void init(FMLInitializationEvent) {
        FMLCommonHandler.instance().bus().register(new MyAwesomeClass());
    }
}

 

That should be enough to get you started.

[Zio]

This is good?

@SubscribeEvent
    public void checkUpdate(PlayerLoggedInEvent event)
    {
    	
    }

[Jwosty]

Yeah, but don't forget to register the instance with MinecraftForge.EVENT_BUS.register. It should then work.

[Zio]

Now the problem is:

the .executeCommand method needs a IComnandSender variable and a command. How can I create the variable ICommandSender and make it works?

[Zio]

So I do:

EntityPlayerMP player;

This is good?

[Zio]

What is the event that is raised when the chat is opened? (T)

[Zio]

I have an idea:

Can we create a bot that automatically writes the command.

But I need a code to open the chat.

This is the code of my idea:

@SubscribeEvent
public void chatEvent(ClientChatReceivedEvent event)
{
	Robot robot;
	try {
	robot = new Robot();	

	robot.keyPress(KeyEvent.VK_B);
    	robot.keyRelease(KeyEvent.VK_B);
    	robot.keyPress(KeyEvent.VK_E);
    	robot.keyRelease(KeyEvent.VK_E);
    	robot.keyPress(KeyEvent.VK_L);
    	robot.keyRelease(KeyEvent.VK_L);
    	robot.keyPress(KeyEvent.VK_L);
    	robot.keyRelease(KeyEvent.VK_L);
    	robot.keyPress(KeyEvent.VK_A);
    	robot.keyRelease(KeyEvent.VK_A);
    	
	} catch (AWTException e) {
		e.printStackTrace();
	}
}

This is a list of some events: https://dl.dropboxusercontent.com/s/h777x7ugherqs0w/forgeevents.html

[Zio]

I need a method to open the chat through Java. Any idea?

[MultiMote]

U do it wrong, but Minecraft.getMinecraft().displayGuiScreen(new GuiChat("/something"));

 

 

Use Minecraft.getMinecraft().thePlayer.sendChatMessage("/something");

 

[Zio]

If I use "Minecraft.getMinecraft().displayGuiScreen(new GuiChat("/something"));" nothing happens.

 

If I use "Minecraft.getMinecraft().thePlayer.sendChatMessage("/something");" in singleplayer, minecraft crashes.

If I use "Minecraft.getMinecraft().thePlayer.sendChatMessage("/something");" in multiplater nothing happens.

[MultiMote]

Post your crash log.

[Zio]

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 29/09/14 20.08
Description: Ticking memory connection

java.lang.NullPointerException: Ticking memory connection
at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:110)
at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:247)
at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:736)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:624)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:495)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:762)


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

-- Head --
Stacktrace:
at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:110)
at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:247)

-- Ticking connection --
Details:
Connection: net.minecraft.network.NetworkManager@6ca14425
Stacktrace:
at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:736)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:624)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:495)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:762)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_67, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 744985016 bytes (710 MB) / 1038876672 bytes (990 MB) up to 1038876672 bytes (990 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 2, tcache: 0, allocated: 12, tallocated: 94
FML: MCP v9.05 FML v7.10.18.1180 Minecraft Forge 10.13.0.1180 5 mods loaded, 5 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.18.1180} [Forge Mod Loader] (forgeSrc-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.0.1180} [Minecraft Forge] (forgeSrc-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
examplemod{1.0} [Example Mod] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
mod_Gunscraft{1.0} [Gunscraft Mod] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['ForgeDevName'/439, l='New World', x=-107,86, y=69,00, z=193,82]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

[Zio]

No. You get the player from the event.

How?

[Zio]

How I use it?