Java tutorial
package buildcraftAdditions.networking; import net.minecraft.item.Item; import net.minecraft.item.ItemStack; import cpw.mods.fml.client.FMLClientHandler; import cpw.mods.fml.common.network.simpleimpl.IMessage; import cpw.mods.fml.common.network.simpleimpl.IMessageHandler; import cpw.mods.fml.common.network.simpleimpl.MessageContext; import buildcraftAdditions.tileEntities.TileSemiAutomaticDuster; import io.netty.buffer.ByteBuf; /** * Copyright (c) 2014, AEnterprise * http://buildcraftadditions.wordpress.com/ * Buildcraft Additions is distributed under the terms of GNU GPL v3.0 * Please check the contents of the license located in * http://buildcraftadditions.wordpress.com/wiki/licensing-stuff/ */ public class MessageSemiAutomaticDuster implements IMessage, IMessageHandler<MessageSemiAutomaticDuster, IMessage> { public int x, y, z, id, meta; public MessageSemiAutomaticDuster() { } public MessageSemiAutomaticDuster(int x, int y, int z, ItemStack stack) { this.x = x; this.y = y; this.z = z; if (stack != null) { this.id = Item.getIdFromItem(stack.getItem()); this.meta = stack.getItemDamage(); } else { this.id = 0; } } @Override public void fromBytes(ByteBuf buf) { this.x = buf.readInt(); this.y = buf.readInt(); this.z = buf.readInt(); this.id = buf.readInt(); this.meta = buf.readInt(); } @Override public void toBytes(ByteBuf buf) { buf.writeInt(this.x); buf.writeInt(this.y); buf.writeInt(this.z); buf.writeInt(this.id); buf.writeInt(this.meta); } @Override public IMessage onMessage(MessageSemiAutomaticDuster message, MessageContext ctx) { TileSemiAutomaticDuster duster = (TileSemiAutomaticDuster) FMLClientHandler.instance().getWorldClient() .getTileEntity(message.x, message.y, message.z); if (duster == null) return null; if (message.id != 0) { duster.setInventorySlotContents(0, new ItemStack(Item.getItemById(message.id), message.meta)); } else { duster.setInventorySlotContents(0, null); } return null; } }