访问限制：“Application”类型不是API（对所需库rt.jar的限制）

Question

这是代码：

package mscontroller;

import javax.swing.*;
import com.apple.eawt.Application;

public class Main {
    public static void main(String[] args)
    {
        Application app = new Application();
        app.setEnabledAboutMenu(true);

        AMEListener listener = new AMEListener();
        app.addApplicationListener(listener);
        JFrame mainFrame = new JFrame("Application Menu Example");
        mainFrame.setSize(500, 500);
        mainFrame.setVisible(true);
    }
}

这是错误：

Exception in thread "main" java.lang.Error: Unresolved compilation
problems:   Access restriction: The type 'Application' is not API
(restriction on required library
'/Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home/jre/lib/rt.jar')
    Access restriction: The constructor 'Application()' is not API
(restriction on required library
'/Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home/jre/lib/rt.jar')
    Access restriction: The type 'Application' is not API (restriction on
required library
'/Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home/jre/lib/rt.jar')
    Access restriction: The method
'Application.setEnabledAboutMenu(boolean)' is not API (restriction on
required library
'/Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home/jre/lib/rt.jar')
    AMEListener cannot be resolved to a type    AMEListener cannot be
resolved to a type

    at mscontroller.Main.main(Main.java:9)

eclipse says this:

访问限制：类型“应用程序”不是API（对所需库“ /Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home/jre/lib/rt.jar”的限制）

Answer 1

这也发生在我身上，这里给出的答案已经不令人满意，所以我做了自己的研究。

背景：Eclipse 访问限制
Eclipse具有一种称为访问限制的机制，可防止你意外使用Eclipse认为不属于公共API的类。通常，从两种意义上讲，Eclipse都是正确的：我们通常不想使用不属于公共API的内容。Eclipse通常对公共API的组成部分是正确的是正确的。

问题
现在，在某些情况下，你想使用公共Non-API，例如sun.misc（你不应该，除非你知道自己在做什么）。在某些情况下，Eclipse并不是真的正确（这就是发生在我身上的事情，我只是想使用javax.smartcardio）。在这种情况下，我们会在Eclipse中收到此错误。

解
解决方案是更改访问限制。

• Go to the properties of your Java project,
• i.e. by selecting “Properties” from the context menu of the project in the “Package Explorer”.
• Go to “Java Build Path”, tab “Libraries”.
• Expand the library entry
• select
• “Access rules”,
• “Edit…” and
• “Add…” a “Resolution: Accessible” with a corresponding rule pattern. For me that was “javax/smartcardio/”, for you it might instead be “com/apple/eawt/”.