1. Getting Started Java Fundamentals CSC207 – Software Design Summer 2011 – University of Toronto – Department of Computer Science

2. Java Released in 1995 by Sun Microsystems Key characteristics: –Object Oriented language –Suitable for web and network programming –Portable Java programs are platform independent

3. NetBeans IDE You can download it, together with JDK, from: –http://www.oracle.com/technetwork/java/javas e/downloads/jdk-netbeans-jsp-142931.htmlhttp://www.oracle.com/technetwork/java/javas e/downloads/jdk-netbeans-jsp-142931.html Quick Start: –Create a new project –Basic Java program structure –The popular “Hello World” !

4. Project Management We use DrProject –https://stanley.cdf.toronto.edu/drproject/csc207-2011-05https://stanley.cdf.toronto.edu/drproject/csc207-2011-05 –Wiki pages –Code Repository –Project Ticketing –Mailing List !

5. Code Repository Checking out from the repository –Directly to the NetBeans Team > Subversion > Checkout –You can check out all of the lecture codes from: svn co https://stanley.cdf.toronto.edu/svn/csc207-2011-05/All/lectureCode –Sample Project: LectureCode1

6. Programming Fundamentals Keywords Method Variable Constant Assignment Comparison Selections Iteration Comment Containers Encapsulation Scoping Libraries –Graphics –Input / Output –Network

7. Java Keywords

8. Practice Code 1 Write a program which takes two numbers from the input and prints the result of their basic numerical calculations (addition, subtraction, division, reminder) Improve the output formatting: \b \t \n \r \" \' \\ backspace tab newline carriage return double quote single quote backslash

9. Primitive Data Types Java is a strictly-typed language –All variables must first be declared before they can be used int x; // variable declaration x = 1; // variable assignment int y = 2; // variable declaration and assignment Type byte short int long float double Storage 8 bits 16 bits 32 bits 64 bits 32 bits 64 bits Min Value -128 -32,768 -2,147,483,648 < -9 x 10 18 +/- 3.4 x 10 38 with 7 significant digits +/- 1.7 x 10 308 with 15 significant digits Max Value 127 32,767 2,147,483,647 > 9 x 10 18 Numeric P.D.Ts

10. Primitive Data Types char – All Unicode characters boolean –True / False –Boolean b = true; String –String name = “Hesam”; –String fullName; –fullName = name + “Esfahani”; uppercase letters lowercase letters punctuation digits special symbols control characters A, B, C, … a, b, c, … period, semi-colon, … 0, 1, 2, … &, |, \, … carriage return, tab,...

11. Primitive Data Types Default Values Data TypeDefault Value (for fields) byte0 short0 int0 long0L float0.0f double0.0d char'\u0000' String (or any object) null booleanfalse

12. Methods Contains program statements –Logically cohesive Program is composed of classes Each class contains –Methods –Attributes

13. Comments Java Comments are in three forms: // this comment runs to the end of the line /* this comment runs to the terminating symbol, even across line breaks */ /** this is a javadoc comment */

14. Control Structures Conditional Statements –If - else –Switch Comparison –Equals== –Not Equal!= –Greater > –Greater or Equal>= –Less than< –Less than or equal<= Logic Operations –Logical AND&& –Logical ORII Practice Code cntd. : Get the operator from the input, as well. Practice Code cntd. : say if the two number are equal, or the greater one

15. Control Structures Iteration –While –For –Do - while Practice Code cntd : print “a” n times, where n is the result of operation