Hello Buddy! Welcome to my personal home page.
This is a place where you can find my story, study,
business... and many many things about me.
So if you are really interest on me, check this out!
Data Structures (Objects) and Algorithms using JAVA
This is my favourite subject in the university, it talks about
problem solving techniques that allow construction of sophisticated,
time-efficient programs. I am especially interested when the implementation
is done by JAVA, I've been studying this subject during my early days
in the Computer Industry, where the programming language being used was
PASCAL and C.
One of the key topic is Sorting.
Sorting is a fundamental application for computers. Much of the
output eventually produced by a computation is sorted in some
way, and many computations are made efficient by invoking a
sorting procedure internally. Therefore sorting is perhaps the
most intensively studied and important operation in computer
science.
Why is sorting so important?
In real-life, finding a person's name in a phone book is easy, but finding a
phone number without knowing the person's name is virtually impossible.
As a result, any significant amount of computer output is generally
arranged in some sorted order so that it can be interpreted. Below
are some examples:
Words in dictionary are sorted
Files in a directory are often listed in sorted order
Index of a book is sorted
Card catalog in a library is sorted by author and title
Banks provide statements that list checks in increasing order by check number
I've once developed a Sorting Algorithm Visualizer, during one of
the projects in my study of the course - Software Development Process
Management. The application aims at visualizing sorting steps, number of
comarisons performed and number of swaps of various popular Sorting
Algorithm such as:
This section is written for those people who decided to take
the SCJP Exam, and to share my experience on it, as I can't
really find any relevant websites or forum in Hong Kong.
The night before the exam, I was reading a
Taiwan Forum
on JAVA Certification, and those resources are really
useful
and help me a lot understanding the keypoints of passing
the exam.
I haven't buy any books for the exam nor did I joined any
course. Most of the time I am learning by my own and just
practice over an over lots of JAVA programs, as long as you
have an internet access, you can search through the web and
get your answers to many problems.
I couldn't remember where did I heard this:
Asking the compiler is always better than asking anybody.
This is very true, if you have any doubt on the coding of JAVA,
try to compile it and see what's the output. It always give you
the explanation.
Examination Topics
Chapter 1: Language Fundamentals
Chapter 2: Declarations and Access Control
Chapter 3: Operators and Assignments
Chapter 4: Flow Control, Exceptions, and Assertions
Chapter 5: Object Orientation, Overloading and Overriding, Constructors and Return Types
Chapter 6: Java.lang -- The Math Class, Strings, and Wrappers
Chapter 7: Objects and Collections
Chapter 8: Inner Classes
Chapter 9: Threads
Taking the Exam
To pass the exam, you need to answer total 61 questions within
2 Hours and score at least 52%.
Most of the questions are selection based, maybe multiple or
single choice(s). And about half of the question will require
you to read through a program of 10~20 lines JAVA code.
Study Notes written based on http://www.jchq.net Download and decompressed by WinZip or JAR
