NullPointerException當添加農作物時，Minecraft MCP Forge 1.6？

-2

我在Minecraft MCP Forge 1.6中製作了一個我的世界MOD（不知道是否將它放入遊戲部分），我在加載遊戲時獲得NullPointerException。NullPointerException當添加農作物時，Minecraft MCP Forge 1.6？

下面是代碼：
主營：http://pastebin.com/w8i0p46d

package net.minecraft.MFM; 

import net.minecraft.MSM.eventmanager; 
import net.minecraft.block.Block; 
import net.minecraft.creativetab.CreativeTabs; 
import net.minecraft.item.Item; 
import net.minecraft.item.ItemFood; 
import net.minecraft.item.ItemSeedFood; 
import net.minecraft.item.ItemStack; 
import net.minecraft.potion.Potion; 
import cpw.mods.fml.common.Mod; 
import cpw.mods.fml.common.Mod.EventHandler; 
import cpw.mods.fml.common.Mod.Init; 
import cpw.mods.fml.common.Mod.Instance; 
import cpw.mods.fml.common.event.FMLInitializationEvent; 
import cpw.mods.fml.common.network.NetworkMod; 
import cpw.mods.fml.common.network.NetworkRegistry; 
import cpw.mods.fml.common.registry.GameRegistry; 
import cpw.mods.fml.common.registry.LanguageRegistry; 
import cpw.mods.fml.relauncher.Side; 
import cpw.mods.fml.relauncher.SideOnly; 

@Mod(modid = morefoodmod.modid, name = "More Food Mod", version = "0.1") 
@NetworkMod(clientSideRequired = true, serverSideRequired = false) 

public class morefoodmod { 
    public static final String modid = "morefoodmod"; 
    @Instance("morefoodmod") 
    public static morefoodmod instance = new morefoodmod(); 

    // public static CommonProxy proxy; 

    @Init 
    public void initMain(FMLInitializationEvent e) { 
     // NetworkRegistry.instance().registerGuiHandler(this, new guiHandler()); 
    } 
    public static CreativeTabs mfmTab; 
    public static Block BlockStrawberry; 
    public static Item ItemHealingApple; 
    public static Item ItemRegenApple; 
    public static Item ItemStrawberry; 

    eventmanager eventmanager = new eventmanager(); 

    @EventHandler 
    public void load(FMLInitializationEvent e) { 
     mfmTab = new CreativeTabs("mfmTab") { 
      @SideOnly(Side.CLIENT) 
      public Item getTabItemIconIndex() { 
       return Item.fishCooked; 
      } 
     }; 
     LanguageRegistry.instance().addStringLocalization(mfmTab.getTranslatedTabLabel(), "More Food Mod"); 
     ItemHealingApple = new HealingApple(5371, 4, 2F, false).setPotionEffect(Potion.regeneration.id, 1, 255, 1.0F).setUnlocalizedName("itemHealingApple"); 
     ItemRegenApple = new RegenApple(8029, 4, 2F, false).setPotionEffect(Potion.regeneration.id, 300, 1, 1F).setUnlocalizedName("itemRegenApple"); 
     // Exception thrown on the following statement. 
     ItemStrawberry = new ItemSeedFood(7231, 3, 0.5F, BlockStrawberry.blockID, Block.tilledField.blockID).setUnlocalizedName("itemStrawberry").setTextureName(modid + ":" + "itemStrawberry").setCreativeTab(CreativeTabs.tabFood); 
     BlockStrawberry = new Strawberry(1018).setUnlocalizedName("blockStrawberry"); 
     GameRegistry.addRecipe(new ItemStack(ItemHealingApple, 1), new Object[]{"GPG", "DAD", "GPG", 'G', Item.ingotGold, 'D', Item.diamond, 'A', Item.appleRed, 'P', new ItemStack(Item.potion, 1, 8261)}); 
     GameRegistry.addRecipe(new ItemStack(ItemRegenApple, 1),new Object[]{"GPG", "DAD", "GPG", 'G', Item.ingotGold, 'D', Item.diamond, 'A', Item.appleRed, 'P', new ItemStack(Item.potion, 1, 8193)}); 

     registerBlock(BlockStrawberry, "StrawberryGrow"); 
     registerItem(ItemStrawberry, "Strawberry"); 
     registerItem(ItemHealingApple, "Healing Apple"); 
     registerItem(ItemRegenApple ,"Regeneration Apple"); 
    } 
    public void registerItem(Item item, String name){ 
     GameRegistry.registerItem(item, item.getUnlocalizedName()); 
     LanguageRegistry.addName(item, name); 
    } 
    public void registerBlock(Block block, String name){ 
     GameRegistry.registerBlock(block, block.getUnlocalizedName()); 
     LanguageRegistry.addName(block, name); 
    } 
}

草莓：http://pastebin.com/7qC4DkNt

package net.minecraft.MFM; 

import cpw.mods.fml.relauncher.Side; 
import cpw.mods.fml.relauncher.SideOnly; 
import net.minecraft.block.Block; 
import net.minecraft.block.BlockCrops; 
import net.minecraft.client.renderer.texture.IconRegister; 
import net.minecraft.util.Icon; 

public class Strawberry extends BlockCrops { 
    @SideOnly(Side.CLIENT) 
    private Icon[] iconArray; 

    protected Strawberry(int par1) { 
     super(par1); 
    } 

    @SideOnly(Side.CLIENT) 
    public Icon getIcon(int side, int metadata) { 
     if(metadata > 7) { 
      if(metadata == 6) 
        metadata = 5; 
      return iconArray[metadata >> 1]; 
     } 
     return iconArray[3]; 
    } 
    public int getSeedItem() { 
      return morefoodmod.ItemStrawberry.itemID; 
    } 
    public int getCropItem() { 
      return morefoodmod.ItemStrawberry.itemID; 
    } 
    @SideOnly(Side.CLIENT) 
    public void registerIcons(IconRegister iconRegister) { 
     this.iconArray = new Icon[4]; 

     for(int i = 0; i < this.iconArray.length; i++) 
      this.iconArray[i] = iconRegister.registerIcon(morefoodmod.modid + ":" + "itemStrawberry_" + (i+1)); 
    } 

}

來源

2014-05-09 user3532547

http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it – Mat

不要嘗試訪問空對象。您需要找到哪個對象爲null，然後確保它在該點之前的某個位置被初始化。 – csmckelvey

您正在使用的對象其實之前初始化它：

ItemStrawberry = new ItemSeedFood(7231, 3, 0.5F, BlockStrawberry.blockID, Block.tilledField.blockID).setUnlocalizedName("itemStrawberry").setTextureName(modid + ":" + "itemStrawberry").setCreativeTab(CreativeTabs.tabFood); 
BlockStrawberry = new Strawberry(1018).setUnlocalizedName("blockStrawberry");

BlockStrawBerry應該初始化爲ItemStrawberry。

來源

2014-05-09 17:02:50 hoefling

NullPointerException當添加農作物時，Minecraft MCP Forge 1.6？

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