我正在为《我的世界》模块Thaumcraft编写一个插件，特别是一个基于文件内容向模块添加外观的插件。这是针对Minecraft 1.7.10的
该代码运行preInit方法，一切正常。但是，游戏在postInit方法上崩溃。我不知道为什么会崩溃
这是崩溃报告中的堆栈跟踪：
---- Minecraft Crash Report ----
// I'm sorry, Dave.
Time: 6/10/15 5:40 PM
Description: Initializing game
java.lang.StringIndexOutOfBoundsException: String index out of range:
-1
at java.lang.String.substring(Unknown Source)
at polymer.aspectadder.AspectAdder.decodeValues(AspectAdder.java:105)
at polymer.aspectadder.AspectAdder.postInit(AspectAdder.java:64)
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 cpw.mods.fml.common.FMLModContainer.
handleModStateEvent(FMLModContainer.java:513)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.
handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.
handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.
dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.
sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.
propogateStateMessage(LoadController.java:187)
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 com.google.common.eventbus.EventSubscriber.
handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber
.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.
dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.
distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:694)
at cpw.mods.fml.client.FMLClientHandler.
finishMinecraftLoading(FMLClientHandler.java:288)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:541)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
at net.minecraft.client.main.Main.main(SourceFile:148)
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)
A detailed walkthrough of the error, its code path and all known details
is as follows:
---------------------------------------------------------------------------
------------
-- Head --
Stacktrace:
at java.lang.String.substring(Unknown Source)
at polymer.aspectadder.AspectAdder.decodeValues(AspectAdder.java:105)
at polymer.aspectadder.AspectAdder.postInit(AspectAdder.java:64)
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 cpw.mods.fml.common.FMLModContainer.
handleModStateEvent(FMLModContainer.java:513)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.
handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.
handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.
dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.
sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.
propogateStateMessage(LoadController.java:187)
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 com.google.common.eventbus.EventSubscriber.
handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.
handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.
dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.
distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:694)
at cpw.mods.fml.client.FMLClientHandler.
finishMinecraftLoading(FMLClientHandler.java:288)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:541)
-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
at net.minecraft.client.main.Main.main(SourceFile:148)
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)
该文件中包含以下行：
minecraft：sponge = WATER，WATER，WATER，VOID，VOID，CROP
这应该添加3个WATER方面，2个VOID方面和1个CROP方面。
这是我的代码：
package polymer.aspectadder;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
import java.util.Set;
import java.util.logging.Logger;
import net.minecraft.item.Item;
import thaumcraft.api.ThaumcraftApi;
import thaumcraft.api.aspects.Aspect;
import thaumcraft.api.aspects.AspectList;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.registry.GameRegistry;
@Mod(modid = "aspectadder", name = "Aspect Adder",
version = "1.0,minecraft 1.7.10",
dependencies="required-after:Thaumcraft")
public class AspectAdder {
/*
* A mod that allows the adding of Thaumcraft aspects to items, blocks,
* or entities (enchantments may be added one day :D)
* This is done through a config file.
*
* This is an example of how to add an aspect to something, in this case
* adding 3 telum and 2 instrumentum to a Tinker's Construct Battleaxe
*
* tconstruct:battleaxe=WEAPON,WEAPON,WEAPON,TOOL,TOOL
*/
public static Logger log = Logger.getLogger("Aspect Adder");
static String pathOfClass =
AspectAdder.class.getProtectionDomain()
.getCodeSource().getLocation().getPath();
static String pathOfInstall = pathOfClass.substring(0,
pathOfClass.indexOf("mods")); //back up to the install folder
static String path =
pathOfInstall.concat("config/aspectadder").substring(6);
@EventHandler
public void preInit(FMLPreInitializationEvent event){
if(System.getProperty("os.name").startsWith("Windows")){
path.replaceAll("/", "\\\\");
}
log.info("Creating a file at " + path + " if one does not exist.");
try {
new File(path).mkdirs();
new File(path + File.separator + "entries.txt").createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
@EventHandler
public void init(FMLInitializationEvent event){
}
@EventHandler
public void postInit(FMLPostInitializationEvent event){
decodeValues(readFile());
}
static Properties readFile(){
Properties p = new Properties();
File f = new File(path + File.separator + "entries.txt");
FileInputStream inStream;
try {
inStream = new FileInputStream(f);
p.load(inStream);
inStream.close();
} catch (FileNotFoundException fnfe) {
try {
f.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
// do nothing, since we handled this at lines 39-44
// this catch clause is just here so the code runs
// plus, the file is blank anyways if it wasn't there
} catch (IOException ioe) {
ioe.printStackTrace();
}
return p;
}
static void decodeValues(Properties p){
Set<Object> keySet= p.keySet();
Object[] keys = new Object[p.size()];
int dex = 0;
for(Object o : keySet){
keys[dex] = o;
dex++;
}
for(int i = 0; i < keys.length; i++){
String key = keys[i].toString();
Item item = GameRegistry.findItem(
key.toString().substring(0, key.indexOf(":")),
key.toString().substring(key.indexOf(":") + 1));
//these are modID and item name, without the colon
addAspects(item, p.getProperty(key));
}
}
static void addAspects(Item item, String aspects) {
log.info("Adding Aspects: " + aspects + " to " +
item.getUnlocalizedName());
AspectList list = new AspectList();
int commaIndex = 0;
int i = 0;
do{
String aspect = aspects.substring(commaIndex + 1, aspects.substring(commaIndex + 1).indexOf(","));
commaIndex = aspects.substring(commaIndex + 1).indexOf(",");
list.add(Aspect.getAspect(aspect), 1);
i++;
log.info("Attempting to add " + Aspect.getAspect(aspect).getTag() + " (" + aspect.toLowerCase() + ") to " + item.getUnlocalizedName());
}while(commaIndex < aspects.lastIndexOf(","));
ThaumcraftApi.registerObjectTag(item.getUnlocalizedName(), list);
}
}
因此，您不必计算所有这些行，崩溃似乎是由这段代码引起的：
for(int i = 0; i < keys.length; i++){
String key = keys[i].toString();
Item item = GameRegistry.findItem(
//the following line is the one in the crash report
key.toString().substring(0, key.indexOf(":")),
key.toString().substring(key.indexOf(":") + 1));
//these are modID and item name, without the colon
addAspects(item, p.getProperty(key));
}
最佳答案
它很可能在空行中崩溃，因为它无法在其中找到:字符。将此行添加到创建Item的行上方：
if (key.length() == 0) continue;
另外，您不需要调用
key.toString()：只需key应该可以。它已经是一个字符串。关于java - 我的世界伪造似乎没有调用postInit，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30768030/