玩的是https://www.mcbbs.net/forum.php?mod=viewthread&tid=772457这个整合包，启动时经常出现崩溃现象（往往多重启几次就能进入）。

Minecraft崩溃了！请认真阅读建议。
Minecraft不完整或Mod冲突，如果有未能下载的文件请下载成功后重试或是客户端损坏请重试请重新制作客户端或下载整合包解决问题。
java.lang.reflect.InvocationTargetException
        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 org.jackhuang.hellominecraft.launcher.Launcher.main(Launcher.java:114)
Caused by: java.lang.NoClassDefFoundError: ivorius/ivtoolkit/tools/JavaCompatibility
        at ivorius.ivtoolkit.IvToolkitLoadingPlugin.getASMTransformerClass(IvToolkitLoadingPlugin.java:38)
        at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:130)
        at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
        ... 5 more
Caused by: java.lang.ClassNotFoundException: ivorius.ivtoolkit.tools.JavaCompatibility
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 9 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer me.towdium.jecharacters.core.ClassTransformer@f72203 from coremod JechCore
        at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:262)
        at $wrapper.me.towdium.jecharacters.core.ClassTransformer.transform(Unknown Source)
        at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
        ... 11 more
Caused by: java.lang.ClassCircularityError: me/towdium/jecharacters/transform/TransformerRegistry
        at me.towdium.jecharacters.core.ClassTransformer.transform(ClassTransformer.java:17)
        at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:258)
        ... 14 more

*** Game Exited ***
Exception in thread "main" net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
    at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
    at java.lang.SecurityManager.checkExit(Unknown Source)
    at java.lang.Runtime.exit(Unknown Source)
    at java.lang.System.exit(Unknown Source)
    at org.jackhuang.hellominecraft.launcher.Launcher.main(Launcher.java:131)


以上是错误报告
希望大佬帮忙看看

更新你的Java或者是将JustEnoughCharacters删除。

怎么更新java呢 我非常烦恼 尤其就是64位的- -

可以在java的英文官网上找到64位的java
https://www.java.com/EN/