2. true
3. true
4. new
5. false
9.3
10. double
69. I do like the Java compiler. The error messages that it displays tell me where the error is and what the error is so that I can debug it.
70. A good class can be used over and over again in many different programs. If an error occurs in an object's class, it is much easier to debug because you only have to look for errors in that class' methods. We don't need the know the specifics of the arguments we input into the program because all we need to know are to instantiate the objects and how to use the class' methods that were created earlier in the program.