出现导入错误是什么意思？

Question

I am using a code sample that suppose to be working, but I keep get an error with those 3 import statement.

import com.amazonaws.services.s3.transfer.internal.MultipartUploadCallable;
import com.amazonaws.services.s3.transfer.internal.PutObjectCallable;
import com.amazonaws.services.s3.transfer.internal.TransferStateUpdatingCallable;

the error message says : The import com.amazonaws.services.s3.transfer.internal.MultipartUploadCallable cannot be resolved

why is that happening and how can I solve it ?

Answer 1

Please add jars that contain this classes. This will always solve your problem.

Answer 2

This means that implementations of referenced classes cannot be found in classpath. Since you are using amazonaws you should add appropriate library to your project's dependencies.