introduction to computer science by peter norton pdf

... surprised to learn that computer science is not the study of computers A famous computerscientist named Edsgar Dijkstra once quipped that computers are to computer science what telescopes are toastronomy ... of computerscience and is, therefore, important to anyone interested in becoming a computer professional But others canalso benefit from the experience Computers have become a commonplace tool ... turned a couple computer programming classes into a lucrative career option Computers are so commonplace in thebusiness world today that the ability to understand and program computers might

Ngày tải lên: 25/03/2017, 17:07

... a variable referring to the receiver of the message Trang 22   this – Chaining Constructors • “this” can be used to simplify constructor code by allowing one constructor to call another • We ... variables of the class type • To create instances of the class using constructors • To send messages to instances of the class by invoking class instance methods • To know the class public interface ... and Methods III: Static Methods and Variables Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview

Ngày tải lên: 11/01/2020, 18:40

... Trang 1   Chapter 6 Iteration Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview ... Java // code to read and display GIF image from file import java.awt.*; Import CSLib.*; … DrawingBox g = new DrawingBox(); … Toolkit tools = Toolkit.getDefaultToolkit(): Image mouse = tools.getImage(“C:/KMR/images/mouse.gif”); ... –1 to terminate”); // read first score score = in.readInt(); while ( score != -1 ) { i++; // insert code to process score // read next score score = in.readInt(); } Trang 14   Reading to

Ngày tải lên: 11/01/2020, 18:43

... Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview In this chapter we will: • show how to organize ... provided to programmers along with the Java compiler (e.g Math or MouseEvent) – Java expects to find these classes in separate directories or folders • The classes stored in each directory form ... toString() { String result = toString(); return (result + “:” + second); } • To make a call toString in the superclass instead public void toString() { String result = super.toString(); return (result

Ngày tải lên: 11/01/2020, 18:45

... Trang 1Chapter 14Recursion Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by Trang 2Chapter PreviewIn this chapter we will: • introduce ... method would be added to IntList public int length() { Trang 28Converting List to String• This method would be added to IntList public String toString() { String myValue = Integer.toString(value); ... would be added to IntList public IntList nth(int n) { Trang 30Adding Element to End of List• This method would be added to IntList public void addToEndM(int n) { Trang 32Adding Element to List in

Ngày tải lên: 11/01/2020, 18:46

... Java AWT Part |: Mouse Events (Optional) Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2Chapter Preview ... show how a program can respond to mouse events (e.g clicks and mouse movements) demonstrate how to implement a listener Interface show how mouse events can be used to build highly interactive ... Windowing Toolkit (AWT) ¢ Part of the Java distribution, but not part of the Java language itself ¢ AWT Is library of classes and methods used by Java programmers that supported are by the basic

Ngày tải lên: 11/01/2020, 18:47

... Trang 1   Chapter 5 Classes and Methods II Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview ... initialized to default values if no initializers are found – integers and doubles are initialized to 0 – characters are initialized to the null character (ASCII code 0) – booleans are initialized to ... Reads and stores the hour and minute data String toString() Returns string version of time suitable for printing void setHour(int h) Sets hour to h void setMinute(int m) Sets minute to m int

Ngày tải lên: 11/01/2020, 19:00

... public class TwoButtons extends Frame { Button redButton, blueButton; public TwoButttons() { super(“Two Buttons Frame”); redButton = new Button(“Red” ); blueButton = new Button(“Blue”); Trang ... possible to use inheritance to allow TwoButtons to become a frame tn Its own right ¢ Note that the UML diagram will show TwoButtons as a subclass of Frame ¢ You will need to use super ( )to set ... Trang 4Can use pack( ) to set size to accommodate preferred sizes of components) Trang 5f = new Frame(“Two Buttons Frame”); redButton = new Button(“Red” ); blueButton = new Button(“Blue”); Trang

Ngày tải lên: 11/01/2020, 19:02

... Trang 1   Chapter 2 Classes and Methods I Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) byS.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview ... source listings to make things more readable • comments – lines beginning with two slashes // – single or multiple lines enclosed by /* */ – that allow the programmer to insert notes to help other ... in a data file called Hitwall.java using an editor • Compile the source program by typing javac Hitwall.java • Execute the compiled program by typing java Hitwall Trang 6   Program Elements

Ngày tải lên: 11/01/2020, 19:06

... your application will need • If you guess too low, you will still run out of space • You do not need to use all the elements in an array (but total computer memory is finite) Trang 16   Trang ... pointer to the array, not a new array (arrays are passed by reference) • This means that if the method makes changes to the array, these changes are still in effect when the method returns to its ... counts[10] // error – trying to access // variable outside counts Trang 7   Expressions as Subscripts • Array subscripts do not have to be constants • Array subscripts do need to be integer expressions

Ngày tải lên: 11/01/2020, 19:27

... Trang 1Chapter 1 What is Programming? Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2Chapter Preview ... Is pervasive — easy to create multiple objects of the same type — easy to create similar objects without having to rewrite the overlapping code ¢ OOP makes programs easier to understand and more ... represented by dividing them into picture elements known as pixels — video images or animations are represented by placing several picture one after another — sounds are represented by sampling

Ngày tải lên: 11/01/2020, 19:29

... 1   Chapter 3 Fundamental Data Types of Java Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) byS.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview ... int is not infinitely large and it is possible to compute a value incorrectly because the value is too large to be stored in an int variable storage location • Unlike the real numbers in mathematics ... is legal to assign a n int to an char variable char c = 97; // assigns ‘a’ to c • It is possible to perform arithmetic on char variables char ch = ‘a’; ch = ch + 1; // assigns ‘b’ to ch

Ngày tải lên: 11/01/2020, 20:03

... 9 Nested Loops and Two-Dimensional Arrays Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview ... Row Totals double [] yearTotals = new double[ROWS]; for (y = 0; y < ROWS; y++) { // compute total for year y yearTotals[y] = 0.0; for (s =0; s < COLS; s++) yearTotals[y] = yearTotals[y] ... double[COLS]; Trang 15   Computer Graphics • Computer graphics is the study of methods of representing and manipulating images • A two-dimensional array can be used to represent the image to be displayed

Ngày tải lên: 11/01/2020, 20:21

... 1Chapter 15Text Processing and File Input/Output Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2Chapter PreviewIn ... Java provides constructors for each class • The StringBuffer class also contains a ToString method to allow easier output Trang 5Sequential Files• Files are stored are stored on disks • In this ... end of line • PrintWriter is a wrapper class provided to convert several data type values to printable forms Trang 14Writing to a File• To make a file available for printing PrintWriter pr =

Ngày tải lên: 11/01/2020, 20:25

... and Methods IV: Static Methods and Variables Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2Chapter PreviewIn ... instance per object • Created by adding the modifier static to the variables declaration • Allows variables to be modified once for all class objects • Can be accessed by class methods Trang 5Class ... by sending it as a message to an object • The class method f in the class C is invoked using the notation f.C( … ) • It has no receiver and cannot refer to instance variables • It can refer to

Ngày tải lên: 11/01/2020, 20:29

... Trang 1   Chapter 4 Decision Making Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview ... selector variables in Java switch statements Trang 4   Trang 5   Relational Operators < < less than > > greater than <= less than or equal to >= greater than or equal to = ... at 9:00 today”); out.println(“Math meets at 10:00 today”); break; case TUESDAY: case THURSDAY: out.println(“English meets at 9:00 today”); out.println(“Chemistry meets at 10:00 today”);

Ngày tải lên: 11/01/2020, 20:31

... combine to make larger numbers Trang 4How Computers Represent Data• Binary number system – Used by computers to count– Two distinct digits, 0 and 1– 0 and 1 combine to make numbers Trang 5How Computers ... and bytes – Binary numbers are made of bits– Bit represents a switch – A byte is 8 bits– Byte represents one character Trang 6How Computers Represent Data• Text codes – Converts letters into binary– ... 5ATransforming Data Into Information Trang 3How Computers Represent Data• Number systems – A manner of counting– Several different number systems exist • Decimal number system – Used by humans to count–

Ngày tải lên: 29/01/2020, 23:59

... and OS X – Require expensive computers – Tend to be complex Trang 7Types of Operating Systems• Multi user/Multitasking OS – Many users connect to one computer– Each user has a unique session – UNIX, ... access to OS features • Share information between programs – Copy and paste – Object Linking and Embedding Trang 15Managing Hardware• Programs need to access hardware • Interrupts – CPU is stopped ... inexpensive computers Trang 6Types of Operating Systems• Single user/Multitasking OS – User performs many tasks at once – Most common form of OS – Windows XP and OS X – Require expensive computers

Ngày tải lên: 30/01/2020, 00:05

... Use to enhance a speech– Mouse click advances to next slide– Physical transparencies on an overhead– Computer screen delivery – Large monitor delivery– Data projector Trang 20Using a Large Monitor ... Copyright © 2006 by The McGraw­Hill Companies, Inc. All rights reserved. Trang 2McGraw­Hill Technology Education Chapter 8A Productivity Software Trang 3• Integrated tools that work together• Solve ... programs include text tools Trang 12Spreadsheet Programs • Calculates numbers and finances • Data viewable in many ways – Tables– Graphs • Complex calculations can be automated Trang 13Spreadsheet

Ngày tải lên: 30/01/2020, 00:28

... reuse about 100 times Trang 21Recordable Optical Technologies• Photo CD – Developed by Kodak– Provides for photo storage– Photos added to CD until full– Original pictures cannot be changed Trang 23Recordable ... charges into binary Trang 8Data Retrieval Trang 9Magnetic Storage Devices• Data organization – Disks must be formatted before use– Format draws tracks on the disk – Tracks is divided into sectors ... read Trang 10Tracks and Sectors Trang 11Magnetic Storage Devices• Finding data on disk – Each track and sector is labeled • Some are reserved – Listing of where files are stored • File Allocation

Ngày tải lên: 30/01/2020, 00:43