Going Further with Exception Handling
In the lab on experimenting with exception handling, you used the following
application.
Example4.java
These questions/tasks will allow you to go further with some of the topics
that were raised in that lab.
1 Making the Application Useful
Before going any further, make the application (at least somewhat)
useful by modifying it so that it supports addition (+), subtraction
(-), multiplication (*), and division (/).
Note: Don't add functionality to allow it to process complicated expressions
involving more than one operation. While interesting, that task is unrelated
to the topics addressed in the lab.
2 Batch Processing
As it is currently written, this application can only process one
expression (i.e., command line argument) at a time. In other words,
modify the applicationso that it processes all of the command line
arguments rather than just args[0]. (Your program
should treat each command line argument as a different expression to
evaluate. So, for example, it should be able to be executed as
follows: java Example4 5.0+4.1 3.2*9.1.
3 Better Error Messages
Modify the application so that it tells you which operand is not a
number. (Hint: You may need to use nested try-catch
blocks.)
