Java SecurityException: signer information does not match

Question

I recompiled my classes as usual, and suddenly got the following error message. Why? How can I fix it?

java.lang.SecurityException: class \"Chinese_English_D         


        

Answer 1

I was running JUNIT 5 and was also referencing Hamcrest external jar. But Hamcrest is also part of JUNIT 5 library. So, I have to change the order of external Hamecrest jar file up the JUNIT 5 library in build path.