试图从Eclipse运行Minecraft时发生了非法的反射访问操作

Question

我想开始Minecraft，但我无法从Eclipse启动它。以下是当我尝试将run configurations与net.minecraftforge.legacydev.mainclient一起使用时收到的错误消息：

[2020-10-18 19:22:51] [INFO   ] Natives: C:\Users\MyPC\Documents\Projects\Forge-MDK\build\natives 
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by net.minecraftforge.legacydev.MainClient (file:/C:/Users/MyPC/.gradle/caches/modules-2/files-2.1/net.minecraftforge/legacydev/0.2.3.1/f2cd4a8c9f09faf1c1e4a9a4c65df36e634f95db/legacydev-0.2.3.1-fatjar.jar) to method java.lang.ClassLoader.initializePath(java.lang.String)
WARNING: Please consider reporting this to the maintainers of net.minecraftforge.legacydev.MainClient
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-10-18 19:22:51] [INFO   ] Main Class: net.minecraft.launchwrapper.Launch 
[2020-10-18 19:22:51] [INFO   ] Srg2Mcp: C:\Users\MyPC\Documents\Projects\Forge-MDK\build\createSrgToMcp\output.srg 
[2020-10-18 19:22:51] [INFO   ] Extra: [] 
[2020-10-18 19:22:51] [INFO   ] Running with arguments: [--version, 1.16.2, --assetIndex, 1.12, --assetsDir, C:\Users\MyPC\.gradle\caches\forge_gradle\assets, --accessToken, {REDACTED}, --userProperties, [], --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker] 
Exception in thread "main" java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at net.minecraftforge.legacydev.Main.start(Main.java:86)
    at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29)
Caused by: java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
    at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
    ... 6 more

我以前检查过类似的问题，普遍的共识是Minecraft不支持最新版本的Java，我必须使用Java8（或1.8）。因此，我更改了Eclipse首选项，将执行环境设置为Java Platform,Standard Edition 8.0。我还下载了版本为OpenJDK“1.8.0_265”的JDK，并将编译器首选项设置为1.8。这些方法都没有解决这个问题。我知道如果我使用的是Java8，这个问题应该是不可能的，那么我忘记了什么呢？

提前感谢！

Answer 1

我只是为自己解决了这个问题。我必须将JRE1.8.0_261添加到“Java>Installed JREs”，然后选择“Java>Installed JREs>Execution Environments”，并确保下拉菜单显示“cdc-1.0/foundation-1.0(JRE1.8.0_261)”。