Access restriction: The type BASE64Decoder is not accessible due to restriction on required library

本文介绍了解决Eclipse中因使用被限制的JDK工具类而产生的编译错误的方法,通过调整Eclipse的编译器设置,将特定警告级别从错误更改为警告。

Access restriction: The type BASE64Decoder is not accessible due to restriction on required library

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我们平时看项目的时候,会遇到一些项目中引用了如下亮哥包,它们是 jdk 自带的一些工具类,但是问题是编译器总是报错,这个时候我们可以修改 Eclipse 对于此类问题的提示级别:

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

 

调试一个JAVA程序,Eclipse下报错:

The method encode(byte[]) from the type CharacterEncoder is not accessible due to restriction on required library C:\Program Files\Java\jdk1.6.0_21\jre\lib\rt.jar

其实要解决它也很容易,在Window -preferences - Java - Compiler - Errors/Warnings界面的Deprecated and restricted API下。把Forbidden reference (access rules): 的规则由默认的Error改为Warning即可。

 

Exception in thread "main" java.lang.Error: Unresolved compilation problems: Access restriction: The type String is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type UIManager is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type UIManager is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar The method getSystemLookAndFeel() is undefined for the type UIManager Access restriction: The type Exception is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The method printStackTrace() from the type Throwable is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type JFrame is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The constructor JFrame(String) is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type JFrame is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The method setDefaultCloseOperation(int) from the type JFrame is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type JFrame is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The field EXIT_ON_CLOSE from the type JFrame is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The method setSize(int, int) from the type Window is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The method setLocationRelativeTo(Component) from the type Window is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The method add(Component) from the type Container is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The constructor JLabel(String, int) is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type JLabel is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The type SwingConstants is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The field CENTER from the type SwingConstants is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar Access restriction: The method setVisible(boolean) from the type Window is not accessible due to restriction on required library C:\Program Files (x86)\Java\jdk1.8.0\jre\lib\rt.jar at MainApp.main(MainApp.java:5)测试的代码报错
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12-16
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