Eclipse does not compile the solution

These two days eclipse is not compiled, no matter how the change is saved, the classes directory is empty.


Find a lot of articles on the Internet, summed up as follows:


Eclipse does not compile resolution 1. Make sure the project->build automatically has been selected.


Eclipse does not compile resolution 2. If selected, also does not work, use this trick: Project->clean. -> Select 2nd Clean Select project, hook up start build immediatelly


Eclipse does not compile resolution 3. Delete the current project, set up the compile file output path in advance, re-import the source file, set Eclipse to compile when saving, and then automatically compile the


Eclipse does not compile the solution 4. If a project leads to a unused jar pack, and that bag was deleted by you, there will be no error but how can not compile the class file situation, you can remove all the packages, and then one after the introduction (need), not all of a sudden put all the packages are introduced, The useless may cause the bad result.


Eclipse does not compile resolution 5. You want to delete a class file to regenerate, remove the class file, but the folder under the Classes directory is opened by other programs, such as Total commander. At this point, the compilation will not pass, under problems may prompt "con" t delete classes ... ". Turn off other programs and recompile.


Eclipse does not compile resolution 6. There is also the case that the JRE System Library is removed and can be compiled by re-import. But what causes it is not clear.


Eclipse does not compile resolution 7. Remove all the packages from the build path. Then add Jars,add libraries the need to add in, incredibly began to compile ...


Eclipse does not compile the output folder that resolves the 8.project->properties->java build path->source->.../web-inf/src do not default, edit let it point to ... /web-inf/classes


Then click the Build project again to automatically compile. My problem is here, I accidentally deleted this compilation directory


Eclipse does not compile the solution 9. Then the most important to see whether the project below the work directory, because the CVS control does not add the work version, so checkout after this directory, to manually add some works can be automatically compiled


In the beginning, I only found the first 7 methods, but they did not solve my problem. Accidentally I opened the "Problems" tag, found inside said missing work directory, manually plus, and then refresh the project on it.


The last two were found when I wrote this summary. In particular, the Nineth article is useful for projects that use CVS for versioning.


. classpath this XML file should be looked at carefully


The solution that eclipse does not compile is this, and hopefully it will help you.