Complete the following procedure to compile and run this example:
javac OriginalClass.java
java OriginalClass -s
javac EvolvedClass.java
java EvolvedClass -d
This procedure tests compatibility in one direction only.
To test bidirectional compatibility, perform the same
procedure in the other direction (i.e., in steps 1-4, replace the
original class name with the evolved class name, and vice versa).