为什么对于OperatingSystemMxBean，访问限制为jre6 / lib / rt.jar？ [英] Why is access restricted to jre6/lib/rt.jar for OperatingSystemMxBean?

问题描述

我正在尝试在Eclipse中编译的一些Java代码遇到一些麻烦。我一直收到以下警告......

I'm having a little trouble with some Java code I'm trying to compile in Eclipse. I keep getting the following warning...

Access restriction: The type OperatingSystemMXBean is not accessible due to restriction on required library C:\Program Files\Java\jre6\lib\rt.jar

从这一行代码...

com.sun.management.OperatingSystemMXBean bean = (com.sun.management.OperatingSystemMXBean) java.lang.management.ManagementFactory.getOperatingSystemMXBean();

我已经找到解决方法，但我担心限制警告。此代码适用于我的开源项目（ CfTracker ），如果我'我不想解决此限制我将破坏某种许可协议。任何人都可以帮我理解这个吗？

I've found ways around this but I'm worried about the restriction warning. This code is for my open source project (CfTracker) and I don't want to work around this restriction if I'm going to be breaking some sort of license agreement. Can anyone help me understand this?

推荐答案

这不是许可协议的问题。只是Eclipse试图保护您不使用不属于官方JDK API的类（而是Oracle / Sun的JVM实现的一部分）。

This is not a problem of license agreements. It is just Eclipse trying to protect you from using classes that are not part of the official JDK API (but rather, part of Oracle/Sun's JVM implementation).

是否存在你需要进行类强制转换的一个特殊原因（而不是使用官方界面java.lang.management.OperatingSystemMXBean ）？

Is there a particular reason that you need to class cast (rather than using the "official" interface java.lang.management.OperatingSystemMXBean)?

如果要确保在预期的MXBean不可用时继续运行应用程序，可以添加一些try / catch逻辑来优雅地处理ClassCastException。

If you want to make sure that your application continues to run when the expected MXBean is not available, you could add some try/catch logic to gracefully handle a ClassCastException.

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