求解啊T T

用其他的启动器也有错误T T

MCLauncherBN.exe启动器可以用吗

无理由支持BN无理由试用BN

虽然不知道原因，不过你可以尝试补齐你的.net运行库

下载其他的吧

补齐了，但是还是打不开，其他的启动器也并不能打开游戏。{:10_503:}

用正版启动器吧0 0

???? 10, 2015 7:33:29 ???? net.minecraft.launchwrapper.LogWrapper log
????: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
???? 10, 2015 7:33:29 ???? net.minecraft.launchwrapper.LogWrapper log
????: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
???? 10, 2015 7:33:29 ???? net.minecraft.launchwrapper.LogWrapper log
????: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2015-03-10 19:33:30 [????] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2015-03-10 19:33:30 [????] [ForgeModLoader] Java is Java HotSpot(TM) Client VM, version 1.8.0_40, running on Windows 7:x86:6.1, installed at C:\Program Files (x86)\Java\jre1.8.0_40
2015-03-10 19:33:30 [????] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-03-10 19:33:30 [????] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2015-03-10 19:33:30 [????] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2015-03-10 19:33:30 [????] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
        at java.util.ArrayList$Itr.remove(Unknown Source)
        at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256M; support was removed in 8.0

这是我用BN启动器所说的错误，我的Java有什么问题吗？