Java Compilation Errors: 'Bean' Class Declaration and 'UserBean' Not Found

The error message indicates that there are three errors in the code:

1. In the package declaration, the file should be named 'Bean.java' instead of 'Userbean.java'.

2. In the LoginServlet.java file, there is a reference to a class named 'UserBean' which cannot be found. Make sure that the class exists and is imported correctly.

3. In the LoginServlet.java file, there is another reference to the same missing class 'UserBean'.

To fix these errors, you should rename the file to 'Bean.java' and make sure that the class 'UserBean' exists and is imported correctly in the LoginServlet.java file.