问题:The project was not built due to "Could not delete ...".Fix the problem, then try refreshing this project and building it since it may be inconsistent.

原因:因为myeclipse编译文件的时候需要把之前的删掉重新编译一次,但是你有一个class被占用,如:目录路径在dos里面打开,所以没法删除,就报这个错...所以要做的就是把占用的那个应用  关了就ok了..

解决办法:project--->clean