introduction to computer science using python review

... 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 In this chapter we will: ... 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 Preview In this chapter we will: • ... 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     while Loop • Repeated executes body

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     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 ... Names • Using a fully qualified component name x = java.lang.Math.sqrt(3); • Using an import statement // to allow unqualified references to // all package classes import package.name.*; // to allow

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 In this chapter we will: • introduce ... 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

... 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 In this chapter we will: ... 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 ... the event Listener classes send messages to an event manager requesting to be notified when a particular message occurs Event managers send messages to listeners notifying them when a particular

Ngày tải lên: 11/01/2020, 18:47

... 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 In this chapter we will: ... 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

... 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 ... or Container Trang 8Using Inheritance ¢ It is 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

Ngày tải lên: 11/01/2020, 19:02

... 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 In this chapter we will: ... 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 ... Means it does not return a value to the caller (client) Trang 14– Display text representation of argument and advance output cursor to the next line Trang 15   Using OutputBox import CSLib.*;

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 ... 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 ... 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

... 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: ¢ demonstrate some ... program source code in a data file using an editor Transform the source program into machine language or Java Bytecode using an compiler (e.g Javac) Use an interpreter to execute the compiled program ... 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

Ngày tải lên: 11/01/2020, 19:29

... 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     Chapter Preview In this chapter we will: • ... 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 ... type 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

Ngày tải lên: 11/01/2020, 20:03

... 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 In this chapter we will: ... 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

... 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 this chapter we will: • ... 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

... 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 this chapter we will: • ... 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

... 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 In this chapter we will: ... 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

... 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 Preview In this chapter we will: • ... 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

... 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 In this chapter we will: ... 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

... 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 ... 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 ... Names • Using a fully qualified component name x = java.lang.Math.sqrt(3); • Using an import statement // to allow unqualified references to // all package classes import package.name.*; // to allow

Ngày tải lên: 15/05/2020, 22:33

... 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 Preview In this chapter we will: • introduce ... 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: 15/05/2020, 22:34

... 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 this chapter we will: • ... 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: 15/05/2020, 22:40