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Getting Started

Getting Started. Java Fundamentals CSC207 – Software Design Summer 2011 – University of Toronto – Department of Computer Science. Java. Released in 1995 by Sun Microsystems Key characteristics: Object Oriented language Suitable for web and network programming Portable

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Getting Started

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  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/javase/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/csc207-2011-05 • 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: backspace tab newline carriage return double quote single quote backslash \b \t \n \r \" \' \\

  9. 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 1018 +/- 3.4 x 1038 with 7 significant digits +/- 1.7 x 10308 with 15 significant digits Max Value 127 32,767 2,147,483,647 > 9 x 1018 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 Numeric P.D.Ts

  10. 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, ... Primitive Data Types • char – All Unicode characters • boolean • True / False • Boolean b = true; • String • String name = “Hesam”; • String fullName; • fullName = name + “Esfahani”;

  11. Primitive Data Types • Default Values

  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 OR II 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 Practice Code cntd : print “a” n times, where n is the result of operation • Iteration • While • For • Do - while

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