[1.6.4] can't compile the mod for 4 identical errors?

[AXELTOPOLINO]

Hello guys,

I'm trying to recompile the StarWars mod, but I get 78 warning about deprecated methods (just skipped them) and 4 errors which stop the process. The errors are all the same type:

 

D:\MC modding\mod_starwars\1.x.x\SW 1.1.3 - Forge 9.11.0 - Minecraft 1.6.4\forge\mcp\src\minecraft\cpw\mods\fml\common\ObfuscationReflectionHelper.java:36: type parameters of <T>T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object
            return ReflectionHelper.getPrivateValue(classToAccess, instance, fieldIndex);
                                                   ^

D:\MC modding\mod_starwars\1.x.x\SW 1.1.3 - Forge 9.11.0 - Minecraft 1.6.4\forge\mcp\src\minecraft\cpw\mods\fml\common\ObfuscationReflectionHelper.java:61: type parameters of <T>T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object
            return ReflectionHelper.getPrivateValue(classToAccess, instance, remapFieldNames(classToAccess.getName(),fieldNames));
                                                   ^

D:\MC modding\mod_starwars\1.x.x\SW 1.1.3 - Forge 9.11.0 - Minecraft 1.6.4\forge\mcp\src\minecraft\net\minecraft\src\ModLoader.java:482: type parameters of <T>T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object
        return ObfuscationReflectionHelper.getPrivateValue(instanceclass, instance, fieldindex);
                                                          ^

D:\MC modding\mod_starwars\1.x.x\SW 1.1.3 - Forge 9.11.0 - Minecraft 1.6.4\forge\mcp\src\minecraft\net\minecraft\src\ModLoader.java:496: type parameters of <T>T cannot be determined; no unique maximal instance exists for type variable T with upper bounds T,java.lang.Object
        return ObfuscationReflectionHelper.getPrivateValue(instanceclass, instance, field);
                                                          ^

 

2 errors come from my code (I did some reflections to get some private MC fields but they should work), but the other 2 come from Forge stuff! What should I do? I have already installed forge for 1.6.4 twice 

 

Thanks you a lot guys,

Axel

[LexManos]

If I remember correctly, this is a JDK bug, if you're using 1.6_21. Update your JDK.

[AXELTOPOLINO]

Perfect, thanks as always LexManos!