1. CSC141 Computer Science I Zhen Jiang Dept. of Computer Science
West Chester University
West Chester, PA 19383

2. Table of Contents Introduction Plain text format printout
Variable and its value type
Expression & operator
Math.pow & Math.sqrt
Combined assignment
DecimalFormat
String

3. Welcome Why this class? Job hunting Something help you to stand out!
WCU graduated, Database, Software Engineering, …
vs.
UPenn, Temple, Drexel, …
Something help you to stand out!
— How do you like to be introduced?

4. Research project
Critical thinking, communication, well-plan, etc.
Real competition, deadline, pressure
More realistic system, complex programming, for instance,
Student opportunities:
Sponsorship
NSF, NSA, etc
Industry interns

5. Student Opportunities
Collaboration at international level
Course project
NSF REU
Collaboration at inter-disciplinary level
Collaborative work at inter-department level

6. Industry partners Such as Gnostech, Chase, etc.
Invited talks in courses
Seminars or guest speeches
Curriculum review/assessment
Permanent intern opportunities

7. Attract students and keep them continuously working hard
Goal
Competitive students entrepreneurially and computationally empowered citizenries
Temple, NYU, etc.
IBM, SAP, Vanguard, Bell lab, etc.
Key
Attract students and keep them continuously working hard
Strategy
Real-world computing paradigms and principles in an obstacle-less learning

8. No pain, no gain
Need to handle those things coming from pressure: frustration, upset, madness, etc.
Looking for solution, not excuse.
Deadline!

9. Highlights in class materials (available on class website)
Textbook
Thinking process (instead of resultant program)
Hands-on experience
Happy ending!

10. Print-out Code 2-1 (Welcome.java), page 27 Names Main { } and ( )
Println and print (Code 2-3, page 35)
\n (Code 2-5, page 36), \t (Code 2-6, page 37), and table 2-2.
// (not \\) , page 77
Java is case-sensitive

11. What a println statement (one statement only) will generate the following output (one statement only)?
This program prints a
quote from the Gettysburg Address.
"Four score and seven years ago,
our 'fore fathers' brought forth on this continent
a new nation."
What a println statement (one statement only) will generate the following output?
A "quoted" String is
'much' better if you learn
the rules of "escape sequences."
Also, "" represents an empty String.
Don't forget to use \" instead of " !
'' is not the same as "

12. Variable Code 2-7 (Variable.java), page 39 Type (declaration)
Name, page 43
Begin with [a]-[Z], or _, or $
Contain only [a]-[Z], [0]-[9], _, and $
No keyword
Case distinct
Samples, table 2-4, page 43

14. Assignment Assignment Left is a single variable
Right is a legal expression
Initialization, page 53
Value of variable, page 53
Execution time line, page 55

15. 11/13/2018

16. Expression Operator (Increment.java) Complete list, Table 2-7, page 55
Precedence order, table 2-8, page 58
Prefix/postfix increment (decrement), page
n[x][y][pd].counter[type]++
Casting, page 65
17/3=?
17.0/3=?
(double)17/3 = ?

17. Types, Code 2-10, page 46
Sample, Code 2-18, page 59
10% off?

18. Discrete Types byte short int long Continuous Types float double
Non-numeric Types
boolean
char
11/13/2018

19. Type Representation Bits Bytes #Values
boolean
True or False 1
N/A 2
char
‘a’ or ‘7’ or ‘\n’ 16
216 = 65,536
byte
…,-2,-1,0,1,2,… 8
28 = 256
short
int 4
> 4.29 million
long
> 18 quintillion
float
0.0, 10.5, 32
double 64
11/13/2018

20. double
float
long
int
boolean
short
char
byte
11/13/2018

21. Advanced techniques Math.pow and Math.sqrt, page 62
Combined assignment, table 2-13, page 64
Scope, page 75-77

22. Keyboard Input
Code 2-29 (Payroll.java), page 87

23. String Displaying message, Code 2-32, page 94
Input, converting a string to number, Code 2-33 (PayrollDialog.java), page 97
String to Number
Parse, table 2-18, page 96
String value of, table 9-7, page 581
Number to String – Simple!
12+ “ ”

24. String processing StringDemo.java indexOf, table 9-4, page 572
substring, table 9-5, page 575
Length, Code 2-21, page 73
charAt, toLowerCase, toUpperCase, Code 2-22, page 74
Sting.valueOf, table 9-7, page 581

25. Example Ex 4 Self-evaluation questions: Merge 2 strings a and b?
Split 1 string into 2 parts?
Cut the head?
Cut the tail?
Take the middle?
Search?