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It's a century of hard-to-meet mistakes. Okay, there's a solution.

This is the problem with eclipse, and the problem remains after the restart.

Found this way in the jar, and sure enough.

command line to eclipse path run: Eclipse.exe-clean

Here, incidentally, the cmd command line problem.

1. First we set up a folder in C, for easy access, named MM, and then we create a new two folder in the MM folder, a named NN, another named Oo. As shown in the following:

2. first we try to access the folder, if we want to access the C drive, then we need to input C: on the command line. :

3, we first return from C:\Documents and settings\administrator> to the C packing directory: As shown: We only need to enter the CD on the command line. You can return to the upper-level directory:

4. Then we try to enter the nn folder and the Oo folder under mm folder and mm folder.

You can access the MM folder by entering CD mm on the command line.

5, we can also directly through the NN folder under mm directly jump to the Oo folder. Enter the CD directly ... Then enter the CD OO on the line. As shown in the following:

6. Summary: The input disk such as C: And then enter the equivalent of a C drive (C drive generally into the desktop directory)

Enter the CD directory name and then enter (the directory name is the first-level directory name in the C drive or the directory path in the C drive). such as CD mm is entered in the MM folder.

7. If you want to return to the upper level directory, then enter the CD directly. OK, you can go back to the top-level directory. These are the most commonly used commands in the development process.

CMD command from Baidu Experience: http://jingyan.baidu.com/article/425e69e6918df1be15fc1695.html

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