Lecture Notes – January 20^th

We talked about Quiz 1 and why one answer was better than another – review the comments about it.

We reviewed the things that came up during Lab 2

We completed the lecture notes from January 18^th by looking at the following files in detail.

ReadFromFile1.java

ReadFromFile1a.java

ReadFromFile1b.java

ReadFromFile1c.java

ReadFromFile1d.java

ReadFromFileOutputMessages.doc

ReadFromKeyboard_1.java

ReadFromKeyboard_1a.java

ReadFromKeyboardOutputMessages.doc

We talked briefly about the finally block

finally

{

// used in conjunction with try block

// includes what to do

//either after exception is caught OR

// if it’s not caught

}

We looked at

Propagation.java (listing 10.3, page 539) and

ExceptionScope.java (listing 10.4, page 540)

And we saw how to create a particular Exception object and use it to call the methods

getMessage();

printStackTrace();

We saw that you can create your own exceptions

Study the modified OutOfRangeException.java (listing 10.6 on page 544)

We saw that you can explicitly throw an exception

Study the modified CreatingExceptions.java (listing 10.5 on page 543)