android 3des加密Access restriction: The constructor SunJCE() is not accessible due to restrictio

本文解决了一个在研究Java加密算法时遇到的编译错误,即由于必须的库限制导致无法访问SunJCE()构造函数的问题。通过修改编译选项,可以成功解决此问题。
Access restriction: The constructor SunJCE() is not accessible due to restriction on required library... 
     在研究java加密算法时出现了以下编译错误: Access restriction: The constructor SunJCE() is not accessible due to restriction on required library 
sunjce_provider.jar 由于必须的库限限制访问,SunJCE() 构造函数不可访问。 

       在网上搜了一下,解决办法是修改编译选项,方法如下:Window -> Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and restricted API -> Forbidden reference (access rules) -> Warnings,或者在项目上修改编译选项。 
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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