Announcements. Course syllabus Tutorial/lab signup form (due 4pm today) Lecture 1 notes Homework 1 Initial assessment

Transcription

1 Announcements Handouts (5) to pick up Course syllabus Tutorial/lab signup form (due 4pm today) Lecture 1 notes Homework 1 Initial assessment Please do it now and hand it in as you leave lecture It s ungraded; it is used only in aggregate form for course evaluation 1.00 Lecture 1 Course Overview Introduction to Java 1

2 1.00 course information Course staff: 2 instructors, 8 TAs, 2 RAs, 2 lab TAs, graders Course Web page: web.mit.edu/1.00/www/ All course information on Web Lectures, labs, tutorials, problem sets posted on same day as live event Hardcopy handouts at lecture, lab, tutorial Pick them up as you come in Grad students: register for 1.001, not

3 Course goals Core concepts of software development Software design (and a bit on requirements) Development and debugging/testing Teamwork in software implementation Programming in interactive, object oriented environment: Java; Microsoft C# is very similar Very brief intro to C++ at end; also similar Use of computation for scientific, engineering, management problems Homeworks cover variety of problems Software patterns, e.g., Model-view-controller Problem generator-solver-output generator 3

4 Course goals, p.2 Graphical user interfaces Java Swing, event models Algorithms Sorting, searching, traversing, Concepts, programming, libraries Data structures Stacks, queues, trees, lists, Concepts, programming, libraries Use of libraries Prewritten modules for common tasks Laptops, labs and tutorials Hand in your laptop/tutorial/lab signup form at end of class or by 4pm today in Laptop partner, lab and tutorial assignments will be posted on Web site tomorrow at 9am Get laptop tomorrow (Thursday) or Friday Room , Thu 9am-5pm, Fri 9am-1pm Each pair of students receives laptop for term You must come with your partner to pick up laptop The first lab is Friday: 1-2:30 or 3-4:30, Lab every Friday all term at those times (2 sections) Mandatory attendance. Come with partner, laptop Tutorials start next week: Mon and Tue Separate experienced and inexperienced sections. Mandatory attendance. Come with partner, laptop 4

5 Laptops, labs, tutorials (p.2) Friday labs use laptops, active learning exercises Mini-lectures with lab exercises: programming, simulations, short exercises. TAs, instructors assist during lab Tutorials will also use active learning methods 8 students per tutorial (4 pairs) Short questions, review lecture topics, design exercises Laptops Laptops have wireless cards. Use them all over campus You may use them for other classes this term Return them at or before final exam Homework Turn in via Command (command.mit.edu) Register on Command in the next few days Writing Java programs Laptop computers (Microsoft Windows) Forte Java integrated development environment (IDE) You may load Java and Forte on your own laptop or desktop computer: Windows2000, 256MB RAM strongly recommended Download instructions for Java and Forte IDE posted on 1.00 Web site Lab Friday and tutorials next week will teach you how to use the Forte IDE Athena workstations (UNIX) Forte Java IDE also available; same as on laptops 5

6 Course requirements, resources Course requirements 10 problem sets (60% of grade). Due Fridays. 2 in-class quizzes (16%). On Wednesdays at regular class time. No evening quizzes this term. Final exam during finals period (17%) Quizzes, exam are open book, open notes Tutorials weekly. Mandatory attendance. (3%) Friday lab weekly. Mandatory attendance (4%) Course resources TA office hours. Schedule to be posted on Web and next Mon: 16+ TA hours per week Lab TA hours: Wed and Thu evening, 8 hrs each Instructor office hours after class and by appt Text: Horstmann/Cornell, Core Java, Vol. 1 Academic honesty You may collaborate on understanding lectures, labs, text, tutorials, problem statements. You may discuss the design of your program: options for classes, method signatures. You must then write your Java code yourself. You may get help from students while writing your programs only by: Asking them to point out an error, but not to fix it for you. Explaining Java syntax to you. Use a different example than the program you re writing. We strongly prefer that you get help from TAs, instructors when writing your program 6

7 Wireless Laptop Initiative Course 1.00 is one of 4 wireless laptop pilot projects Why laptops? Some reasons: Easy, convenient access to computing Assess value of collaborative learning Examine supportability of this technology Determine tacit learning attributes What will you get? HP Omnibook 6000, all-in-one unit 256MB RAM 30 GB disk Lucent Wireless LAN cards (802.11b) 650 MHz Pentium III Extra battery Case Software: Forte, Netscape, and MIT Utilities (Purple CD) and TSM (backup) 7

8 Getting Help Course Technical Support: Bassam Chaptini, for all course related questions , (Carrel J) For general hardware & MIT apps support contact either Bassam or I/S Laptop Technical: # (2-4SLP), or laptop-project@mit.edu Your Responsibilities Practice Safe Computing Promiscuous use requires care Provide good care and feeding of your laptop Return the computer at the end of the semester in good condition If the unthinkable happens Contact Campus Police for theft reporting Notify your instructor/course technical contact immediately 8

9 Our Responsibilities to You Prompt responsive support for MIT apps and connectivity Hardware repair Loaner pool machines General help Mutual Responsibilities Backup TSM has been installed (back up tool) You need to use it Recovery Worst case scenario: machine re-imaged by I/S and restored to original working state You load your data from your TSM backups or your personal AFS locker Make this a successful pilot project! Help us by volunteering to keep a journal of your experiences, and, participate in some focus groups (3) over the course of the semester (free pizza!!!) 9

10 Java Modern programming language used for technical and commercial applications Object oriented, as is most modern software Internet-focused, supports distributed computing In the first half of the term, we teach basic elements of Java Focus on syntax, basic concepts, user interface In the second half of the term, we teach object-oriented applications Focus on numerical applications, data structures, algorithms Object-oriented programming Objects are things ( entities ) that have state (data fields) and behaviors (methods, functions) They are a way of organizing large programs into understandable, maintainable, reusable pieces Your 1.00 programs, except for homework 1, will be a set of objects interacting with one another to produce the desired results Examples will be pipes with fluid flows, bus routes in bus networks, elevators in elevator banks, polynomials, robots and stretch wrap devices, dictionaries of misspelled words, Classes are patterns from which objects are made: Pipe class-> many Pipes (objects) 10

11 Object-oriented programming Objects communicate by passing messages They invoke behaviors (methods) and pass parameters (data) in messages Objects encapsulate or hide information Details of one object are hidden from other objects, so their details need not be known Main method launches objects, does little else (except in homework 1) Objects are extensible through inheritance mechanisms Children have parent s traits (state and behavior) and can modify or add traits Objects can dynamically invoke objects that didn t exist (weren t written yet) when the invoker was written. This, and other object concepts, promote code re-use. Developing a Java program Read the homework and understand it. If you don t know what you have to do, you won t be able to do it. Sketch out a design: objects, state, behavior. Decide how to approach the problem Sketch the approach, in words or pictures. Sketch in stages. Write the program in Java, using Forte Create Java source code files in Forte explorer/project Write Java code using Forte editor Write only as much as you think will compile at each stage (e.g., reading the input). Use Forte Java compiler Once one stage compiles, write and compile the next. Stage size will increase over the term. Test, mostly by reading/reviewing code in Forte Use the Forte debugger to read code Repeat the cycle again to pick up details 11

12 Sample Java application public class Welcome1 { public static void main(string[] args) { System.out.println("Welcome to 1.00"); int students= 240; int grads= 35; double pctgrads= (double) grads/students; // Hmmm. System.out.println("Percent grads: " + pctgrads); System.exit(0); } } // Lecture slides will use compressed format with {} // Use more white space in your code // Lecture slides will omit System.exit(0); you must use it Sample GUI application // GUI application opens its own window (frame) on the PC import javax.swing.*; import java.awt.*; public class Welcome extends JFrame { // Creates new form (object) Welcome // main called when application starts public static void main(string args[]) { Welcome app= new Welcome(); app.setdefaultcloseoperation(exit_on_close); app.show(); } } } public Welcome() { // Constructor-called on creation JLabel mylabel= new JLabel("Welcome to 1.00 again"); setsize(300,200); Container conpane= getcontentpane(); conpane.add(mylabel); 12

13 Things to do Hand in your initial assessment Hand in your tutorial assignment form by 4pm today in Those needing a partner: please meet in front or outside briefly now to find one. Check your partner, lab, tutorial sections tomorrow at 9am on 1.00 Web site Pick up your laptop tomorrow or Friday Both partners must come Attend your assigned lab section Friday Bring laptop, partner; we ll learn to use Forte Tutorials start next Monday and Tuesday Register on MIT Command 13