myeclipse renumbered unravel java project is not successful, you can not create a new class file

The reason such words as the title, then just think of it before I removed the two unwanted jar package in the project, but the two did not remove the Libraries in the "Java Build Path", and is being given state (there is a red cross No), then the two jar package delete the normal unravel.

Due to unravel the mechanism of java jar cause problems affect unravel the entire project.

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Origin blog.csdn.net/u012255097/article/details/82752011