无法在 NetBeans 中导入 sun.org.mozilla.javascript.internal
在我的 java 程序中,我大量使用 Suns 的 Rhino 脚本引擎实现。然而最近,我的 JDK 在编译时似乎不再自动导入 rt.jar 文件。
奇怪的是,NetBeans 报告 0 个实时错误,它们仅在执行完整的 Clean & 操作时才会出现。建造。之前我导入 NativeArray 时没有发生过这种情况,所以我真的很困惑为什么它突然停止工作。
规格:
- 操作系统 - Windows
- Java 版本 - java 版本“1.6.0_20”
- Javac 版本 - javac 1.6.0_20
- NetBeans 版本 - 6.9
检查它是否存在:
C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src>javap sun.org.mozill a.javascript.internal.WrappedException Compiled from "WrappedException.java" public class sun.org.mozilla.javascript.internal.WrappedException extends sun.or g.mozilla.javascript.internal.EvaluatorException{ static final long serialVersionUID; public sun.org.mozilla.javascript.internal.WrappedException(java.lang.Throwa ble); public java.lang.Throwable getWrappedException(); public java.lang.Object unwrap(); }
好的,它存在,所以这里有一些测试代码:
package testapp;
import sun.org.mozilla.javascript.internal.WrappedException;
public class Main {
public static void main(String[] args) {
WrappedException e = new WrappedException(null);
}
}
Netbeans 输出:
init: deps-clean: Updating property file: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\built-clean.properties Deleting directory C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build clean: init: deps-jar: Created dir: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build Updating property file: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\built-jar.properties Created dir: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\classes Created dir: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\empty Compiling 1 source file to C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\classes C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp\Main.java:8: package sun.org.mozilla.javascript.internal does not exist import sun.org.mozilla.javascript.internal.WrappedException; C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp\Main.java:16: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp\Main.java:16: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ 3 errors C:\Documents and Settings\LordQuackstar\Desktop\TestApp\nbproject\build-impl.xml:528: The following error occurred while executing this line: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\nbproject\build-impl.xml:261: Compile failed; see the compiler error output for details. BUILD FAILED (total time: 0 seconds)
命令行输出:
C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp>javac Main.java Main.java:3: package sun.org.mozilla.javascript.internal does not exist import sun.org.mozilla.javascript.internal.WrappedException; ^ Main.java:7: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ Main.java:7: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ 3 errors
那么什么会导致这个突然失败呢?昨天还运行得很好。除了从同一个包中导入另外 2 个类之外,我没有做任何更改。我的依赖关系都没有改变。
将在linux下进行测试,看看问题是否仍然存在。
在你说之前:不,我不会单独下载 rhino,不,我不会改变 IDE,
In my java program I make heavy use of Suns implmentation of the Rhino script engine. Very recently however, my JDK does not seem to automatically import the rt.jar file anymore when compiling.
Whats strange is that NetBeans reports 0 live errors, they only show up when doing a complete Clean & Build. This wasn't happening before when I was importing NativeArray, so I'm really confused on why it all of a sudden stopped working.
Specs:
- OS - Windows
- Java version - java version "1.6.0_20"
- Javac version - javac 1.6.0_20
- NetBeans version - 6.9
Check to see if it exists:
C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src>javap sun.org.mozill a.javascript.internal.WrappedException Compiled from "WrappedException.java" public class sun.org.mozilla.javascript.internal.WrappedException extends sun.or g.mozilla.javascript.internal.EvaluatorException{ static final long serialVersionUID; public sun.org.mozilla.javascript.internal.WrappedException(java.lang.Throwa ble); public java.lang.Throwable getWrappedException(); public java.lang.Object unwrap(); }
Ok it exists, so here's some test code:
package testapp;
import sun.org.mozilla.javascript.internal.WrappedException;
public class Main {
public static void main(String[] args) {
WrappedException e = new WrappedException(null);
}
}
Netbeans output:
init: deps-clean: Updating property file: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\built-clean.properties Deleting directory C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build clean: init: deps-jar: Created dir: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build Updating property file: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\built-jar.properties Created dir: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\classes Created dir: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\empty Compiling 1 source file to C:\Documents and Settings\LordQuackstar\Desktop\TestApp\build\classes C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp\Main.java:8: package sun.org.mozilla.javascript.internal does not exist import sun.org.mozilla.javascript.internal.WrappedException; C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp\Main.java:16: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp\Main.java:16: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ 3 errors C:\Documents and Settings\LordQuackstar\Desktop\TestApp\nbproject\build-impl.xml:528: The following error occurred while executing this line: C:\Documents and Settings\LordQuackstar\Desktop\TestApp\nbproject\build-impl.xml:261: Compile failed; see the compiler error output for details. BUILD FAILED (total time: 0 seconds)
Command line output:
C:\Documents and Settings\LordQuackstar\Desktop\TestApp\src\testapp>javac Main.java Main.java:3: package sun.org.mozilla.javascript.internal does not exist import sun.org.mozilla.javascript.internal.WrappedException; ^ Main.java:7: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ Main.java:7: cannot find symbol symbol : class WrappedException location: class testapp.Main WrappedException e = new WrappedException(null); ^ 3 errors
So what would cause this to fail all of a sudden? It was working just fine yesterday. I didn't change anything besides importing 2 more classes from the same package. None of my dependencies changed.
Will test in linux to see if the problem still exists.
Before you say it: No I'm not download rhino separatly, No I'm not changing IDEs,
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有两个迹象表明您不应该使用此类:
sun
和internal
- 这意味着这是一些第三方不应使用的内部类。因为它可以在未来的版本中更改或删除 - 即这不是 API 的一部分。所以 - 单独下载 Rhino。如果您使用脚本 API - 仅使用 API 类/接口 - 即
javax.script
There are two indications that you shouldn't use this class:
sun
andinternal
- these mean that this is some internal class that shouldn't be used by third parties. Because it can change or be removed in future releases - i.e. this is not part of an API. So - download Rhino separately.If you are using the scripting API - use only the API classes/interfaces - i.e.
javax.script
我同意上述建议,您最好不要尝试使用 sun 内部软件包。
这就引出了一个问题,如何在没有 sun.org.mozilla.javascript.internal.NativeArray 的情况下访问 JavaScript 数组?
对我有用的是代码如下。这将基于名为 vars 的 JavaScript 数组创建一个名为 vars 的 Java 数组。
I agree w/ the above advice that you're better off not trying to use the sun internal packages.
This begs the question, how do you access JavaScript arrays w/out sun.org.mozilla.javascript.internal.NativeArray?
What worked for me is code as follows. This creates a Java array called vars based off a JavaScript array called vars.
我有同样的错误。您必须手动将 JRE 目录中的
rt.jar
添加到项目库中。只有这个解决方案似乎有效。您还可以在此处查看有关此方法的教程罗布·迪·马科 (Rob Di Marco)I had the same error. You must manually add
rt.jar
from JRE dir to project libraries. Only this solution seems work. You can also see a tutorial on this approach here by Rob Di Marco现在这是一个老问题了,但是当我遇到这个问题时,我的解决方案是在 JavaScript 环境中做更多工作,然后返回原始类型(String / Boolean)而不是对象。
当然,这并不能满足所有人和所有要求,但在某些情况下可能会有所帮助。
This is an old question now, however when I had this problem, my solution was to do more work in the JavaScript environment and then to return a primitive type (String / Boolean) rather than an object.
Of course, this will not satisfy everyone and all requirements, but it may help in some cases.