在JAVA项目开发中，使用到了BASE64Decoder，但编辑运行时却会出现以下错误：Access restriction required library rt.jar，这里就详细的说明一下如何解决这个问题。

 

方法/步骤

 
  1.  

    双击桌面上的Eclipse快捷方式启动Eclipse。

  2.  

    Eclipse启动中。

  3.  

    选中出错的项目，点击项目菜单》属性

  4.  

    点击左侧的“JAVA Build Path”。

  5.  

    切换到“Libraries”标签，选中“Access rules”，点击“Edit”。

  6.  

    点击“Add”按钮。

  7.  

    Resolution选择Accessible，Rules Pattern输入“**”，点击OK。

  8.  

    成功添加一条规则，点击OK。

  9.  

    这时你会发现Access rules的值已经改变，点击OK问题就解决啦。

    END
 

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