CSE 113
Week 1
January 14 – 18, 2008
Monday
 Syllabus
 Course Policies
Wednesday Announcements
 If you do not have a syllabus, please
come get one.
 If you have not signed and turned in
the last page of the syllabus, please
do so.
 If you are having registration issues,
please come and see me.
Wednesday Game Plan
 Questions about course/policies
 Recitation Change Form
 Introduce themes of course
Wednesday
 How does a computer work?
 What does it really understand?
 How do we speak to a computer?
Friday Announcements
 Need syllabus? Come down and get
one.
 Make sure to turn in signed last page
of syllabus
 Lab change form – fill out and return
if needed
 No class Monday
Friday Game Plan
 Introduction to DrJava environment
 Expressions
 Statements
Friday
 DrJava is broken up into three panes:
files, definitions, interactions
 We will spend the first part of the
semester working in the interactions
pane
 There we can type Java code and
have DrJava evaluate it for us
Friday
 Expressions are code that can be
evaluated to produce a result
 Arithmetic expressions
3+4
 Hit enter, and DrJava reports 7 as the
result of evaluating that expression
Friday
 Putting a ; at the end of an
expression turns it into a statement
 DrJava does not return the value that
results
 You can use a special statement,
System.out.println(“Text”);
To print the word Text to the screen.
Friday
 The types of things are very
important to Java
 Numbers that are whole numbers
(integers) are treated differently than
those with a fractional part (real
numbers)
 Typing in ½ gives a result that may
be surprising