introduction to computer science using java harvard

... Classes 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 ... 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 ... 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

Ngày tải lên: 11/01/2020, 18:40

... Chapter Iteration Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold     Chapter ... algorithms • describe the Java while, for, and do-while statements • demonstrate the use of loop invariants to verify the correctness of loops • show the use of loops in data entry and computer animation

Ngày tải lên: 11/01/2020, 18:43

... code java.util.Date d = new java.util.Date(); java.awt.Point p = new java.awt.Point(1,2); java.awt.Button b = new java.awt.Button();     • Can be abbreviated import java.util.date; Import java.awt.*; ... Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold     Chapter Preview In this chapter we will: • show how to organize ... Java program) java.net Classes for networking   java.util   Useful auxiliary classes like Date Package Component Names • Using a fully qualified component name x = java.lang.Math.sqrt(3); • Using

Ngày tải lên: 11/01/2020, 18:45

... Chapter 14 Recursion Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, , E Reingold Chapter Preview ... technique is to divide a problem into smaller subproblems • These subproblems may also be divided into smaller subproblems • When the subproblems are small enough to solve directly the process stops ... chapter we will: • introduce recursion as a programming technique • show how recursion can be used to simplify the design of complex algorithms • present several well known recursive algorithms (e.g

Ngày tải lên: 11/01/2020, 18:46

... Trang 1Chapter 11 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, ... 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 Java ... labeled optional, itis not possible to be a complete Java programmer without understanding the AWT Trang 4Java Events Events are occurrences outside of the program to which the program must respond

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 ... is used in the Java language • discuss the use of instance variables to facilitate method communication • demonstrate the use of classes to improve program structure Trang 3• Using separate ... 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

Ngày tải lên: 11/01/2020, 19:00

... need to use super ( )to set the frame title Trang 10Frame Inheritance Example public class TwoButtons extends Frame { Button redButton, blueButton; public TwoButttons() { super(“Two Buttons ... 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 ... Frame”); redButton = new Button(“Red” ); blueButton = new Button(“Blue”); Trang 11Other Simple Java Components ¢ Label — contains some text that can be set using a constructor or the method

Ngày tải lên: 11/01/2020, 19:02

... Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) byS.N Kamin, D Mickunas, E Reingold Trang 2   Chapter Preview In this chapter we will: • describe structure of Java ... code 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 ... 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

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 ...  Expressions as Subscripts • Array subscripts do not have to be constants • Array subscripts do need to be integer expressions that evaluate to valid subscript values for the current array allocation ... 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

Ngày tải lên: 11/01/2020, 19:27

... Trang 1 Chapter 1 What is Programming? Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by Trang 2 Chapter Preview In this chapter we will: ... Trang 19 prog1.java — JAVA 01110100 01101000 01001011 Programmer types program using a fext editor File is stored on disk with type “JAVA.” Text is represented in binary Java compiler runs ... prog1.java prog1.class Trang 20 Running Your Own Java Program Enter the program source code in a data file using an editor Transform the source program into machine language or Java Bytecode using

Ngày tải lên: 11/01/2020, 19:29

... Chapter Fundamental Data Types of Java Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold   ... It is legal to assign a char to an int variable int i = ‘a’; // assigns 97 to i • It is legal to assign an int to an char variable char c = 97; // assigns ‘a’ to c • It is possible to perform ... to test double expressions for equality and obtain a correct result due to rounding errors in representations     Mixing Numeric Data Types • Java will automatically convert int expressions to

Ngày tải lên: 11/01/2020, 20:03

... 1   Chapter 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 ... 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] ... two-dimensional arrays to represent grids of information • show how computer graphics are generated using pixels Trang 3   Nested for Loops • Nested loops frequently used to process two-dimensional

Ngày tải lên: 11/01/2020, 20:21

... Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold Trang 2Chapter PreviewIn this chapter we will: • describe the java.io package ... found in String • To convert between String objects and StringBuffer objects Java provides constructors for each class • The StringBuffer class also contains a ToString method to allow easier ... Programmers often need to read or write files stored on disks Trang 6File Input• Java classes that support file input are found in the java.io package • FileReader allows us to open a file for

Ngày tải lên: 11/01/2020, 20:25

... 10Classes 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 ... 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 and manipulate ... variable, not one 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

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 ... 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

... Classes 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     Chapter ... 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 ... sent to objects • Objects respond to messages that are in their protocols or interfaces     Objects • Encapsulate data values within a single entity • Their behavior is often general enough to

Ngày tải lên: 15/05/2020, 22:27

... 1   Chapter 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 ... 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] ... two-dimensional arrays to represent grids of information • show how computer graphics are generated using pixels Trang 3   Nested for Loops • Nested loops frequently used to process two-dimensional

Ngày tải lên: 15/05/2020, 22:29

... figure below, use to dimension the sketch. Pick to modify the dimensions. Pick it as reference. Pick it as reference. Pick it as reference. 1 ME-430 Introduction to Computer Aided Design ... Click . 18 Click Apply button to change the color of part. Click Close button. Click to save the part. 3 Type in ARM_BRACK for the name ... placement surface. 16 Click to add a new color. To open Color Editor, pick . Pick . 13 ADDING THE ROUNDS Click the Round Tool icon . Enter 5 for the radius...

Ngày tải lên: 27/10/2013, 17:15

... My fears are confirmed. I yell at Richard to bid his friend stop. For some reason, he has to go upstairs to turn off the machine (although it appears to be fully portable and self-contained) ... opportunity to reconsider his or her own dream theory and, into the bargain, to learn about the fascinating discoveries of modern sleep science. xii Why did the analysis of dream content fail to ... chosen to highlight two important points about the doctrine of brain—mind isomorphism. One is that it is just as fruitful to map from the brain to the mind as it is to map from the mind to the...

Ngày tải lên: 24/01/2014, 08:20

... can only touch on, and we have had to be content to quote results in various places as signposts to further study. Nevertheless, our aim has been to provide as much insight as possible into contemporary ... can be used, together with Hubble’s law, to obtain the distance to a galaxy, provided that the galaxy is far enough away for the contribution of random velocities to the redshift to be unimportant. ... because this is too much to be attributed to nucleosynthesis in stars. The steady-state theory is of historical interest, because it is a properly worked out example of an alternative to the big- bang...

Ngày tải lên: 17/03/2014, 13:34