Eclipse does not have permission to manipulate the sun package in the Rt.jar package, resulting in sun.net.ftp.FtpClient reference error

Such as:

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/59/74/wKiom1TTKgORbvA_AACp4tEjDzk318.jpg "title=" Sun packet error. png "alt=" wkiom1ttkgorbva_aacp4tejdzk318.jpg "/>

Eclipse references the Sun package content under Rt.jar, which will cause the above error. The reason is that eclipse does not have permissions and needs to be enabled manually, the following steps

Project right click on Properties-->> Java Build Path-->> Libraries

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/59/71/wKioL1TTLYbwiITCAAUOziVl8PY125.jpg "style=" width : 450px;height:388px; "title=" Authorized Eclipse Operation Sun Pack -001.png "width=" "height=" 388 "border=" 0 "hspace=" 0 "vspace=" 0 "alt=" Wkiol1ttlybwiitcaauozivl8py125.jpg "/>

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/59/74/wKiom1TTLJryCK0MAAE1I94ZD5g280.jpg "style=" width : 450px;height:321px; "title=" Authorized Eclipse Operation Sun Pack -002.png "width=" "height=" 321 "border=" 0 "hspace=" 0 "vspace=" 0 "alt=" Wkiom1ttljryck0maae1i94zd5g280.jpg "/>

After saving, the error is fixed ... The bright of the final clean and cool.

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/59/71/wKioL1TTLlmRBzPiAACLZ6cSIIM798.jpg "title=" Fixed. png "alt=" wkiol1ttllmrbzpiaaclz6csiim798.jpg "/>

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Eclipse does not have permission to manipulate the sun package in the Rt.jar package, resulting in sun.net.ftp.FtpClient reference error