The Type java. Lang. object cannot be resolved. It is indirectly reference

The following error occurs during project import. Check that the package import is normal. Error!] The Type java. Lang. object cannot be resolved. It is indirectly referenced from required. class files After searching for half a day, I found that it was a JDK problem. It turned out that the JDK package was not imported. This may also be the reason: there are multiple JDK versions on the computer, so that problems may occur during myeclipse import. In general, you can use the JDK version that comes with myeclipse, I installed JDK 1.6.013, and it didn't work even if I re-imported it. Later I had to use the 1.6.0013 version of myeclipse. Operation Procedure: Project-> properties-> JAVA bulid path: Delete the original JDK Then, choose Java build path -----> libraries ----> Add libraries -----> JRE system library, select the JDK that comes with myeclipse, or select the appropriate package.