Fall 2017 CISC124 9/16/2017
|
|
- Chloe Miles
- 2 years ago
- Views:
Transcription
1 CISC124 Labs start this week in JEFF 155: Meet your TA. Check out the course web site, if you have not already done so. Watch lecture videos if you need to review anything we have already done. Problems with Eclipse/JDK installation? Work on Exercises 1 to 3. Work on Assignment 1. Ask questions!!! Today Continue Java Syntax: Primitive types. Array declaration. Literals. Variable name syntax rules. Variable declaration. Constant attributes. Type Casting. Fall 2017 CISC124 - Prof. McLeod 1 Fall 2017 CISC124 - Prof. McLeod 2 Aside: Running Supplied *.java Programs Just double clicking on a *.java file may not be too useful! 1. In Eclipse, create a project for this program or decide to add the new file to an existing project. 2. In Windows explorer, copy & paste the file to the src folder within the project chosen above. 3. In Eclipse, choose the project in the Package Explorer at the left and press <F5> to refresh the contents listed the new file should show up in the listing. 4. Or, just paste the file into the project in Eclipse. Java primitive types: char byte short int long float double boolean Primitive Types in Java Fall 2017 CISC124 - Prof. McLeod 3 Fall 2017 CISC124 - Prof. McLeod 4 Primitive Types? What is a primitive type anyways? Everything else in Java is an Object. A variable declared as one of the types shown on the previous slide is not an Object. Why does Java have primitive types? Object construction often involves the data abstraction of several primitive type attributes. Fall 2017 CISC124 - Prof. McLeod 5 Integer Primitive Types byte, short, int, long For byte, from -128 to 127, inclusive (1 byte). For short, from to 32767, inclusive (2 bytes). For int, from to , inclusive (4 bytes). For long, from to , inclusive (8 bytes). A byte is 8 bits, where a bit is either 1 or 0. Fall 2017 CISC124 - Prof. McLeod 6 Prof. Alan McLeod 1
2 Aside - Number Ranges Where do these min and max numbers come from? Memory limitations and the system used by Java (two s complement) to store numbers determines the actual numbers. The Wrapper classes can be used to provide the values - for example: Integer.MAX_VALUE // returns the value Real Primitive Types Also called Floating Point Types: float, double For float, (4 bytes) roughly ±1.4 x to ±3.4 x to 7 significant digits. For double, (8 bytes) roughly ±4.9 x to ±1.7 x to 15 significant digits. More on these topics later! Fall 2017 CISC124 - Prof. McLeod 7 Fall 2017 CISC124 - Prof. McLeod 8 char Character Primitive Type Boolean Primitive Type boolean is either true or false. From '\u0000' to '\uffff' inclusive, that is, from 0 to (base 10) or 0 to ffff (base 16, or hexadecimal ). A variable of the char type represents a Unicode character. Can also be represented as 'a' or '8', etc. Fall 2017 CISC124 - Prof. McLeod 9 Fall 2017 CISC124 - Prof. McLeod 10 String Objects String s are not primitive data types, but are Objects. A String is declared in the same way as a primitive type using the keyword: String. String mystring = Hello Class! ; Or you can instantiate: String mystring = new String( Hello Class! ); Declaration in Java: Array Declaration int[] data = new int[10]; or int[] data; data = new int[10]; new is always involved with the instantiation of an Object. Arrays are Objects in Java. Fall 2017 CISC124 - Prof. McLeod 11 Fall 2017 CISC124 - Prof. McLeod 12 Prof. Alan McLeod 2
3 Arrays vs. Python Lists A Python list can contain any mix of types, and items can be added at any time the list will grow to accept them. On the other hand, a Java array can only hold items of all the same type (even if they are objects). The size of a Java array must be declared and is then fixed. Arrays vs. Python Lists, Cont. In Python you used the slice operator: [ ] or [ : ] to get a single item or a range of items from a list. In Java you can only get at a single element at a time. For example: int[] anarray = {1, 2, 3, 4}; // Array literal! anarray[2] = 10; // Changes third element to 10 Fall 2017 CISC124 - Prof. McLeod 13 Fall 2017 CISC124 - Prof. McLeod 14 Array Declaration, Cont. An array literal is just a set of same-type values separated by commas in a set of { }. Only useful for small arrays To get the size of an array, use the.length attribute. For example anarray.length would provide 4 for the array on the previous slide. Array indices range from 0 to.length 1. Array Declaration, Cont. Cannot dynamically size an array in Java (nothing like malloc() in Java) In Java, you cannot use pointers to access array elements, only the indices. (You can never obtain a memory address in Java!) The first array element is at index zero. In Java you will get an immediate error and your program will halt if you try to go beyond the bounds of your array. Fall 2017 CISC124 - Prof. McLeod 15 Fall 2017 CISC124 - Prof. McLeod 16 A Common Runtime Error public static void main(string[] args) { int[] nums = {10, 20, 4, 2, 6, 7, 8, 12}; int i = 0; while (i <= nums.length) { System.out.println(nums[i]); i++; } // end while } // end main Why would this fail? A Common Runtime Error, Cont. Console output: Exception in thread "main" java.lang.arrayindexoutofboundsexception: 8 at HelloWorld.main(HelloWorld.java:11) What s in the error message? Why does it appear before the error happens? Fall 2017 CISC124 - Prof. McLeod 17 Fall 2017 CISC124 - Prof. McLeod 18 Prof. Alan McLeod 3
4 Integers, for example: Literal Values If you write these kinds of numbers into your program, Java will assume them to be of type int, and store them accordingly. If you want them to be of type long, then you must append a L to the number: 43L L L Binary, Octal and Hex Literals Use the prefix 0b (or 0B) in front of the numbers to get a binary literal. Octal just use 0 Hex use 0x You can also use the underscore _ in-between digits, to aid in visualizing the number. System.out.println(), by default displays the numbers in base 10. (Use printf to show the numbers in another codex or base. See part 2 of Exercise 1.) Fall 2017 CISC124 - Prof. McLeod 19 Fall 2017 CISC124 - Prof. McLeod 20 Binary, Octal and Hex Literals, Cont. Summary examples of other literals: binary: 0b binary with underscores: 0b111_010_111 octal: hex: 0xab10fc Literal Values - Cont. Real or Floating Point numbers, for example: E E45 These literals will be assumed to be of the double type. If you want them to be stored as float types, append an F : 3.456F 5.678E-10F F Fall 2017 CISC124 - Prof. McLeod 21 Fall 2017 CISC124 - Prof. McLeod 22 Literal Values - Cont. char literals: A 5 \u0032 boolean literals: true false String literals: Hello there! West of North Legal Variable Names Java names may contain any number of letters, numbers and underscore ( _ ) characters, but they must begin with a letter. Standard Java Naming Conventions: Names beginning with lowercase letters are variables or methods. Names beginning with uppercase letters are class names. Successive words within a name are capitalized ( CamelCase ). Names in all capital letters are constants. Fall 2017 CISC124 - Prof. McLeod 23 Fall 2017 CISC124 - Prof. McLeod 24 Prof. Alan McLeod 4
5 Variable Declaration Carried out inside a method. Syntax: type variable_name [= value]; Variable Declaration - Cont. Java may prevent you from using variables that are not initialized. So, it is often good practice to initialize your variables before use, for example: int numdaysinyear = 365; double avgnumdaysinyear = ; String greetingline = Hello there! ; long counter = 0; Fall 2017 CISC124 - Prof. McLeod 25 Fall 2017 CISC124 - Prof. McLeod 26 Syntax: Constant Attribute Declaration [private public] [static] final type ATTRIBUTE_NAME = literal_value; The Java keyword, final can be used to make sure a variable value is no longer variable. Usually these are declared public static. The value must be assigned this part is no longer optional. Constants, Cont. Java will not allow your program to change a constant s value once it has been declared. For example: final int NUM_DAYS_IN_YEAR = 365; final double MM_PER_INCH = 25.4; Note that constant names are all in upper-case, by convention. You can also declare constants inside a method. Fall 2017 CISC124 - Prof. McLeod 27 Fall 2017 CISC124 - Prof. McLeod 28 Type Casting When a value of one type is stored into a variable of another type. Casting of primitive types in one direction is automatic, you do not have to deliberately or explicitly cast: A value to the left can be assigned to a variable to the right without explicit casting: byte > short > int > long > float > double Fall 2017 CISC124 - Prof. McLeod 29 Type Casting - Cont. For example in the statement: double myvar = 3; the number 3 is automatically cast to a double (3.0) before it is stored in the variable myvar. However, if you tried the following: int anothervar = ; the compiler would protest loudly because a double cannot be stored in an int variable without loss of precision. Wrong direction! Fall 2017 CISC124 - Prof. McLeod 30 Prof. Alan McLeod 5
6 Casting Operator If you really want to cast in the other direction, then you must make an explicit cast. For example: int anothervar = (int) ; is legal. The (int) part of the statement casts the double to an int. The variable anothervar would hold the value 345 Note how numbers are truncated, not rounded! Fall 2017 CISC124 - Prof. McLeod 31 Aside Casting Objects We will find (later) that you can cast objects using the casting operator too. Objects must have an inheritance relationship in order for the cast to succeed. For example: Integer aval = new Integer(45); Number anum = (Number)aVal; The Integer class extends the Number class. More about this later Fall 2017 CISC124 - Prof. McLeod 32 Prof. Alan McLeod 6
5/3/2006. Today! HelloWorld in BlueJ. HelloWorld in BlueJ, Cont. HelloWorld in BlueJ, Cont. HelloWorld in BlueJ, Cont. HelloWorld in BlueJ, Cont.
Today! Build HelloWorld yourself in BlueJ and Eclipse. Look at all the Java keywords. Primitive Types. HelloWorld in BlueJ 1. Find BlueJ in the start menu, but start the Select VM program instead (you
Computational Expression
Computational Expression Variables, Primitive Data Types, Expressions Janyl Jumadinova 28-30 January, 2019 Janyl Jumadinova Computational Expression 28-30 January, 2019 1 / 17 Variables Variable is a name
Getting started with Java
Getting started with Java Magic Lines public class MagicLines { public static void main(string[] args) { } } Comments Comments are lines in your code that get ignored during execution. Good for leaving
Full file at
Java Programming: From Problem Analysis to Program Design, 3 rd Edition 2-1 Chapter 2 Basic Elements of Java At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class
Data and Variables. Data Types Expressions. String Concatenation Variables Declaration Assignment Shorthand operators. Operators Precedence
Data and Variables Data Types Expressions Operators Precedence String Concatenation Variables Declaration Assignment Shorthand operators Review class All code in a java file is written in a class public
3. Java - Language Constructs I
Educational Objectives 3. Java - Language Constructs I Names and Identifiers, Variables, Assignments, Constants, Datatypes, Operations, Evaluation of Expressions, Type Conversions You know the basic blocks
Data Types, Literals, Operators
Data Types, Literals, Operators Sisoft Technologies Pvt Ltd SRC E7, Shipra Riviera Bazar, Gyan Khand-3, Indirapuram, Ghaziabad Website: www.sisoft.in Email:info@sisoft.in Phone: +91-9999-283-283 Learning
Software Practice 1 Basic Grammar
Software Practice 1 Basic Grammar Basic Syntax Data Type Loop Control Making Decision Prof. Joonwon Lee T.A. Jaehyun Song Jongseok Kim (42) T.A. Sujin Oh Junseong Lee (43) 1 2 Java Program //package details
Program Fundamentals
Program Fundamentals /* HelloWorld.java * The classic Hello, world! program */ class HelloWorld { public static void main (String[ ] args) { System.out.println( Hello, world! ); } } /* HelloWorld.java
Lecture 2. COMP1406/1006 (the Java course) Fall M. Jason Hinek Carleton University
Lecture 2 COMP1406/1006 (the Java course) Fall 2013 M. Jason Hinek Carleton University today s agenda a quick look back (last Thursday) assignment 0 is posted and is due this Friday at 2pm Java compiling
Datatypes, Variables, and Operations
Datatypes, Variables, and Operations 1 Primitive Type Classification 2 Numerical Data Types Name Range Storage Size byte 2 7 to 2 7 1 (-128 to 127) 8-bit signed short 2 15 to 2 15 1 (-32768 to 32767) 16-bit
PROGRAMMING FUNDAMENTALS
PROGRAMMING FUNDAMENTALS Q1. Name any two Object Oriented Programming languages? Q2. Why is java called a platform independent language? Q3. Elaborate the java Compilation process. Q4. Why do we write
Introduction to Programming Using Java (98-388)
Introduction to Programming Using Java (98-388) Understand Java fundamentals Describe the use of main in a Java application Signature of main, why it is static; how to consume an instance of your own class;
Java Fall 2018 Margaret Reid-Miller
Java 15-121 Fall 2018 Margaret Reid-Miller Reminders How many late days can you use all semester? 3 How many late days can you use for a single assignment? 1 What is the penalty for turning an assignment
Object oriented programming. Instructor: Masoud Asghari Web page: Ch: 3
Object oriented programming Instructor: Masoud Asghari Web page: http://www.masses.ir/lectures/oops2017sut Ch: 3 1 In this slide We follow: https://docs.oracle.com/javase/tutorial/index.html Trail: Learning
Lesson 2A Data. Data Types, Variables, Constants, Naming Rules, Limits. A Lesson in Java Programming
Lesson 2A Data Data Types, Variables, Constants, Naming Rules, Limits A Lesson in Java Programming Based on the O(N)CS Lesson Series License for use granted by John Owen to the University of Texas at Austin,
Java Classes & Primitive Types
Java Classes & Primitive Types Rui Moreira Classes Ponto (from figgeom) x : int = 0 y : int = 0 n Attributes q Characteristics/properties of classes q Primitive types (e.g., char, byte, int, float, etc.)
Java Classes & Primitive Types
Java Classes & Primitive Types Rui Moreira Classes Ponto (from figgeom) x : int = 0 y : int = 0 n Attributes q Characteristics/properties of classes q Primitive types (e.g., char, byte, int, float, etc.)
CS5000: Foundations of Programming. Mingon Kang, PhD Computer Science, Kennesaw State University
CS5000: Foundations of Programming Mingon Kang, PhD Computer Science, Kennesaw State University Overview of Source Code Components Comments Library declaration Classes Functions Variables Comments Can
CEN 414 Java Programming
CEN 414 Java Programming Instructor: H. Esin ÜNAL SPRING 2017 Slides are modified from original slides of Y. Daniel Liang WEEK 2 ELEMENTARY PROGRAMMING 2 Computing the Area of a Circle public class ComputeArea
Fall 2017 CISC124 10/1/2017
CISC124 Today First onq quiz this week write in lab. More details in last Wednesday s lecture. Repeated: The quiz availability times will change to match each lab as the week progresses. Useful Java classes:
Basics of Java Programming
Basics of Java Programming Lecture 2 COP 3252 Summer 2017 May 16, 2017 Components of a Java Program statements - A statement is some action or sequence of actions, given as a command in code. A statement
COMP Primitive and Class Types. Yi Hong May 14, 2015
COMP 110-001 Primitive and Class Types Yi Hong May 14, 2015 Review What are the two major parts of an object? What is the relationship between class and object? Design a simple class for Student How to
VARIABLES AND TYPES CITS1001
VARIABLES AND TYPES CITS1001 Scope of this lecture Types in Java the eight primitive types the unlimited number of object types Values and References The Golden Rule Primitive types Every piece of data
Software Practice 1 - Basic Grammar Basic Syntax Data Type Loop Control Making Decision
Software Practice 1 - Basic Grammar Basic Syntax Data Type Loop Control Making Decision Prof. Hwansoo Han T.A. Minseop Jeong T.A. Wonseok Choi 1 Java Program //package details public class ClassName {
An Introduction to Processing
An Introduction to Processing Variables, Data Types & Arithmetic Operators Produced by: Dr. Siobhán Drohan Mairead Meagher Department of Computing and Mathematics http://www.wit.ie/ Topics list Variables.
A Fast Review of C Essentials Part I
A Fast Review of C Essentials Part I Structural Programming by Z. Cihan TAYSI Outline Program development C Essentials Functions Variables & constants Names Formatting Comments Preprocessor Data types
data_type variable_name = value; Here value is optional because in java, you can declare the variable first and then later assign the value to it.
Introduction to JAVA JAVA is a programming language which is used in Android App Development. It is class based and object oriented programming whose syntax is influenced by C++. The primary goals of JAVA
Fall 2017 CISC/CMPE320 9/27/2017
Notices: CISC/CMPE320 Today File I/O Text, Random and Binary. Assignment 1 due next Friday at 7pm. The rest of the assignments will also be moved ahead a week. Teamwork: Let me know who the team leader
Primitive Types. Four integer types: Two floating-point types: One character type: One boolean type: byte short int (most common) long
Primitive Types Four integer types: byte short int (most common) long Two floating-point types: float double (most common) One character type: char One boolean type: boolean 1 2 Primitive Types, cont.
Chapter 2 Elementary Programming
Chapter 2 Elementary Programming Part I 1 Motivations In the preceding chapter, you learned how to create, compile, and run a Java program. Starting from this chapter, you will learn how to solve practical
Fall 2017 CISC124 9/27/2017
CISC124 Assignment 1 due this Friday at 7pm by submission to an onq dropbox. First onq quiz next week write in lab. More details in yesterday s lecture. Today Intro. to 2D Arrays (and iteration examples).
CSE 201 JAVA PROGRAMMING I. Copyright 2016 by Smart Coding School
CSE 201 JAVA PROGRAMMING I Primitive Data Type Primitive Data Type 8-bit signed Two s complement Integer -128 ~ 127 Primitive Data Type 16-bit signed Two s complement Integer -32768 ~ 32767 Primitive Data
Zheng-Liang Lu Java Programming 45 / 79
1 class Lecture2 { 2 3 "Elementray Programming" 4 5 } 6 7 / References 8 [1] Ch. 2 in YDL 9 [2] Ch. 2 and 3 in Sharan 10 [3] Ch. 2 in HS 11 / Zheng-Liang Lu Java Programming 45 / 79 Example Given a radius
3. Java - Language Constructs I
Names and Identifiers A program (that is, a class) needs a name public class SudokuSolver {... 3. Java - Language Constructs I Names and Identifiers, Variables, Assignments, Constants, Datatypes, Operations,
Tester vs. Controller. Elementary Programming. Learning Outcomes. Compile Time vs. Run Time
Tester vs. Controller Elementary Programming EECS1022: Programming for Mobile Computing Winter 2018 CHEN-WEI WANG For effective illustrations, code examples will mostly be written in the form of a tester
Java Basic Datatypees
Basic Datatypees Variables are nothing but reserved memory locations to store values. This means that when you create a variable you reserve some space in the memory. Based on the data type of a variable,
Entry Point of Execution: the main Method. Elementary Programming. Learning Outcomes. Development Process
Entry Point of Execution: the main Method Elementary Programming EECS1021: Object Oriented Programming: from Sensors to Actuators Winter 2019 CHEN-WEI WANG For now, all your programming exercises will
CS260 Intro to Java & Android 03.Java Language Basics
03.Java Language Basics http://www.tutorialspoint.com/java/index.htm CS260 - Intro to Java & Android 1 What is the distinction between fields and variables? Java has the following kinds of variables: Instance
Winter 2019 CISC101 1/17/2019
CISC101 Reminders Today TA emails are listed on the Labs page of the course web site. More assignments are posted. Commanding the CPU the use of a Stack. Computer Languages History of Python. Features
Elementary Programming
Elementary Programming EECS1022: Programming for Mobile Computing Winter 2018 CHEN-WEI WANG Learning Outcomes Learn ingredients of elementary programming: data types [numbers, characters, strings] literal
BASIC COMPUTATION. public static void main(string [] args) Fundamentals of Computer Science I
BASIC COMPUTATION x public static void main(string [] args) Fundamentals of Computer Science I Outline Using Eclipse Data Types Variables Primitive and Class Data Types Expressions Declaration Assignment
Values and Variables 1 / 30
Values and Variables 1 / 30 Values 2 / 30 Computing Computing is any purposeful activity that marries the representation of some dynamic domain with the representation of some dynamic machine that provides
Identifiers and Variables
Identifiers and Variables Lecture 4 Based on Slides of Dr. Norazah Yusof 1 Identifiers All the Java components classes, variables, and methods need names. In Java these names are called identifiers, and,
Computer Science II (20082) Week 1: Review and Inheritance
Computer Science II 4003-232-08 (20082) Week 1: Review and Inheritance Richard Zanibbi Rochester Institute of Technology Review of CS-I Syntax and Semantics of Formal (e.g. Programming) Languages Syntax
1 Epic Test Review 2 Epic Test Review 3 Epic Test Review 4. Epic Test Review 5 Epic Test Review 6 Epic Test Review 7 Epic Test Review 8
Epic Test Review 1 Epic Test Review 2 Epic Test Review 3 Epic Test Review 4 Write a line of code that outputs the phase Hello World to the console without creating a new line character. System.out.print(
Values, Variables, Types & Arithmetic Expressions. Agenda
Values, Variables, Types & Arithmetic Expressions Lecture 2 Object-Oriented Programming Agenda Inside of a Computer Value Variable Data Types in Java Literals Identifiers Type conversions Manipulating
Software and Programming 1
Software and Programming 1 Lab 1: Introduction, HelloWorld Program and use of the Debugger 17 January 2019 SP1-Lab1-2018-19.pptx Tobi Brodie (tobi@dcs.bbk.ac.uk) 1 Module Information Lectures: Afternoon
Advanced Computer Programming
Programming in the Small I: Names and Things (Part II) 188230 Advanced Computer Programming Asst. Prof. Dr. Kanda Runapongsa Saikaew (krunapon@kku.ac.th) Department of Computer Engineering Khon Kaen University
Entry Point of Execution: the main Method. Elementary Programming. Compile Time vs. Run Time. Learning Outcomes
Entry Point of Execution: the main Method Elementary Programming EECS2030: Advanced Object Oriented Programming Fall 2017 CHEN-WEI WANG For now, all your programming exercises will be defined within the
Programming Language Basics
Programming Language Basics Lecture Outline & Notes Overview 1. History & Background 2. Basic Program structure a. How an operating system runs a program i. Machine code ii. OS- specific commands to setup
Outline. Overview. Control statements. Classes and methods. history and advantage how to: program, compile and execute 8 data types 3 types of errors
Outline Overview history and advantage how to: program, compile and execute 8 data types 3 types of errors Control statements Selection and repetition statements Classes and methods methods... 2 Oak A
5/29/2006. Announcements. Last Time. Today. Text File I/O Sample Programs. The File Class. Without using FileReader. Reviewed method overloading.
Last Time Reviewed method overloading. A few useful Java classes: Other handy System class methods Wrapper classes String class StringTokenizer class Assn 3 posted. Announcements Final on June 14 or 15?
CSCI 2010 Principles of Computer Science. Data and Expressions 08/09/2013 CSCI
CSCI 2010 Principles of Computer Science Data and Expressions 08/09/2013 CSCI 2010 1 Data Types, Variables and Expressions in Java We look at the primitive data types, strings and expressions that are
Chapter 2 Primitive Data Types and Operations. Objectives
Chapter 2 Primitive Data Types and Operations Prerequisites for Part I Basic computer skills such as using Windows, Internet Explorer, and Microsoft Word Chapter 1 Introduction to Computers, Programs,
1.00/1.001 Tutorial 1
1.00/1.001 Tutorial 1 Introduction to 1.00 September 12 & 13, 2005 Outline Introductions Administrative Stuff Java Basics Eclipse practice PS1 practice Introductions Me Course TA You Name, nickname, major,
Object Oriented Programming and Design in Java. Session 2 Instructor: Bert Huang
Object Oriented Programming and Design in Java Session 2 Instructor: Bert Huang Announcements TA: Yipeng Huang, yh2315, Mon 4-6 OH on MICE clarification Next Monday's class canceled for Distinguished Lecture:
Object-Oriented Programming
Object-Oriented Programming Java Syntax Program Structure Variables and basic data types. Industry standard naming conventions. Java syntax and coding conventions If Then Else Case statements Looping (for,
Programming with Java
Programming with Java Data Types & Input Statement Lecture 04 First stage Software Engineering Dep. Saman M. Omer 2017-2018 Objectives q By the end of this lecture you should be able to : ü Know rules
Last Time. University of British Columbia CPSC 111, Intro to Computation Alan J. Hu. Readings
University of British Columbia CPSC 111, Intro to Computation Alan J. Hu Writing a Simple Java Program Intro to Variables Readings Your textbook is Big Java (3rd Ed). This Week s Reading: Ch 2.1-2.5, Ch
Lecture Notes. System.out.println( Circle radius: + radius + area: + area); radius radius area area value
Lecture Notes 1. Comments a. /* */ b. // 2. Program Structures a. public class ComputeArea { public static void main(string[ ] args) { // input radius // compute area algorithm // output area Actions to
Java Classes: Math, Integer A C S L E C T U R E 8
Java Classes: Math, Integer A C S - 1903 L E C T U R E 8 Math class Math class is a utility class You cannot create an instance of Math All references to constants and methods will use the prefix Math.
Outline. Parts 1 to 3 introduce and sketch out the ideas of OOP. Part 5 deals with these ideas in closer detail.
OOP in Java 1 Outline 1. Getting started, primitive data types and control structures 2. Classes and objects 3. Extending classes 4. Using some standard packages 5. OOP revisited Parts 1 to 3 introduce
Object-oriented programming. and data-structures CS/ENGRD 2110 SUMMER 2018
Object-oriented programming 1 and data-structures CS/ENGRD 2110 SUMMER 2018 Lecture 1: Types and Control Flow http://courses.cs.cornell.edu/cs2110/2018su Lecture 1 Outline 2 Languages Overview Imperative
Exercises Software Development I. 03 Data Representation. Data types, range of values, internal format, literals. October 22nd, 2014
Exercises Software Development I 03 Data Representation Data types, range of values, ernal format, literals October 22nd, 2014 Software Development I Wer term 2013/2014 Priv.-Doz. Dipl.-Ing. Dr. Andreas
Introduction to Programming (Java) 2/12
Introduction to Programming (Java) 2/12 Michal Krátký Department of Computer Science Technical University of Ostrava Introduction to Programming (Java) 2008/2009 c 2006 2008 Michal Krátký Introduction
Week 6: Review. Java is Case Sensitive
Week 6: Review Java Language Elements: special characters, reserved keywords, variables, operators & expressions, syntax, objects, scoping, Robot world 7 will be used on the midterm. Java is Case Sensitive
AP COMPUTER SCIENCE JAVA CONCEPTS IV: RESERVED WORDS
AP COMPUTER SCIENCE JAVA CONCEPTS IV: RESERVED WORDS PAUL L. BAILEY Abstract. This documents amalgamates various descriptions found on the internet, mostly from Oracle or Wikipedia. Very little of this
printf( Please enter another number: ); scanf( %d, &num2);
CIT 593 Intro to Computer Systems Lecture #13 (11/1/12) Now that we've looked at how an assembly language program runs on a computer, we're ready to move up a level and start working with more powerful
C++ Modern and Lucid C++ for Professional Programmers
Informatik C++ Modern and Lucid C++ for Professional Programmers Part 1 Self-study for Introduction to C++ Prof. Peter Sommerlad Director IFS Institute for Software Rapperswil, HS 2017 Thomas Corbat Additional
Two Types of Types. Primitive Types in Java. Using Primitive Variables. Class #07: Java Primitives. Integer types.
Class #07: Java Primitives Software Design I (CS 120): M. Allen, 13 Sep. 2018 Two Types of Types So far, we have mainly been dealing with objects, like DrawingGizmo, Window, Triangle, that are: 1. Specified
Java Bytecode (binary file)
Java is Compiled Unlike Python, which is an interpreted langauge, Java code is compiled. In Java, a compiler reads in a Java source file (the code that we write), and it translates that code into bytecode.
University of Technology. Laser & Optoelectronics Engineering Department. C++ Lab.
University of Technology Laser & Optoelectronics Engineering Department C++ Lab. Second week Variables Data Types. The usefulness of the "Hello World" programs shown in the previous section is quite questionable.
Visual C# Instructor s Manual Table of Contents
Visual C# 2005 2-1 Chapter 2 Using Data At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class Discussion Topics Additional Projects Additional Resources Key Terms
CS11 Java. Fall Lecture 1
CS11 Java Fall 2006-2007 Lecture 1 Welcome! 8 Lectures Slides posted on CS11 website http://www.cs.caltech.edu/courses/cs11 7-8 Lab Assignments Made available on Mondays Due one week later Monday, 12 noon
Introduction to Computer Science and Object-Oriented Programming
COMP 111 Introduction to Computer Science and Object-Oriented Programming Values Judgment Programs Manipulate Values Inputs them Stores them Calculates new values from existing ones Outputs them In Java
Chapter 2 ELEMENTARY PROGRAMMING
Chapter 2 ELEMENTARY PROGRAMMING Lecture notes for computer programming 1 Faculty of Engineering and Information Technology Prepared by: Iyad Albayouk ١ Objectives To write Java programs to perform simple
Review for Test 1 (Chapter 1-5)
Review for Test 1 (Chapter 1-5) 1. Introduction to Computers, Programs, and Java a) What is a computer? b) What is a computer program? c) A bit is a binary digit 0 or 1. A byte is a sequence of 8 bits.
Reserved Words and Identifiers
1 Programming in C Reserved Words and Identifiers Reserved word Word that has a specific meaning in C Ex: int, return Identifier Word used to name and refer to a data element or object manipulated by the
CS 302: Introduction to Programming
CS 302: Introduction to Programming Lectures 2-3 CS302 Summer 2012 1 Review What is a computer? What is a computer program? Why do we have high-level programming languages? How does a high-level program
COMP-202 Unit 2: Java Basics. CONTENTS: Using Expressions and Variables Types Strings Methods
COMP-202 Unit 2: Java Basics CONTENTS: Using Expressions and Variables Types Strings Methods Assignment 1 Assignment 1 posted on WebCt and course website. It is due May 18th st at 23:30 Worth 6% Part programming,
Java Identifiers, Data Types & Variables
Java Identifiers, Data Types & Variables 1. Java Identifiers: Identifiers are name given to a class, variable or a method. public class TestingShastra { //TestingShastra is an identifier for class char
BIT Java Programming. Sem 1 Session 2011/12. Chapter 2 JAVA. basic
BIT 3383 Java Programming Sem 1 Session 2011/12 Chapter 2 JAVA basic Objective: After this lesson, you should be able to: declare, initialize and use variables according to Java programming language guidelines
CMPT 125: Lecture 3 Data and Expressions
CMPT 125: Lecture 3 Data and Expressions Tamara Smyth, tamaras@cs.sfu.ca School of Computing Science, Simon Fraser University January 3, 2009 1 Character Strings A character string is an object in Java,
Java Notes. 10th ICSE. Saravanan Ganesh
Java Notes 10th ICSE Saravanan Ganesh 13 Java Character Set Character set is a set of valid characters that a language can recognise A character represents any letter, digit or any other sign Java uses
ECE 122. Engineering Problem Solving with Java
ECE 122 Engineering Problem Solving with Java Lecture 8 More Conditional Statements Outline Problem: How do I make choices in my Java program? Understanding conditional statements Remember: Boolean logic
ECE 122. Engineering Problem Solving with Java
ECE 122 Engineering Problem Solving with Java Lecture 8 More Conditional Statements Outline Problem: How do I make choices in my Java program? Understanding conditional statements Remember: Boolean logic
13 th Windsor Regional Secondary School Computer Programming Competition
SCHOOL OF COMPUTER SCIENCE 13 th Windsor Regional Secondary School Computer Programming Competition Hosted by The School of Computer Science, University of Windsor WORKSHOP I [ Overview of the Java/Eclipse
Gabriel Hugh Elkaim Spring CMPE 013/L: C Programming. CMPE 013/L: C Programming
1 Literal Constants Definition A literal or a literal constant is a value, such as a number, character or string, which may be assigned to a variable or a constant. It may also be used directly as a function
Lecture 05 I/O statements Printf, Scanf Simple statements, Compound statements
Programming, Data Structures and Algorithms Prof. Shankar Balachandran Department of Computer Science and Engineering Indian Institute of Technology, Madras Lecture 05 I/O statements Printf, Scanf Simple
Interpreted vs Compiled. Java Compile. Classes, Objects, and Methods. Hello World 10/6/2016. Python Interpreted. Java Compiled
Interpreted vs Compiled Python 1 Java Interpreted Easy to run and test Quicker prototyping Program runs slower Compiled Execution time faster Virtual Machine compiled code portable Java Compile > javac
Objectives. Chapter 2: Basic Elements of C++ Introduction. Objectives (cont d.) A C++ Program (cont d.) A C++ Program
Objectives Chapter 2: Basic Elements of C++ In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates
COMP 110 Introduction to Programming. What did we discuss?
COMP 110 Introduction to Programming Fall 2015 Time: TR 9:30 10:45 Room: AR 121 (Hanes Art Center) Jay Aikat FB 314, aikat@cs.unc.edu Previous Class What did we discuss? COMP 110 Fall 2015 2 1 Today Announcements
1 class Lecture2 { 2 3 "Elementray Programming" / References 8 [1] Ch. 2 in YDL 9 [2] Ch. 2 and 3 in Sharan 10 [3] Ch.
1 class Lecture2 { 2 3 "Elementray Programming" 4 5 } 6 7 / References 8 [1] Ch. 2 in YDL 9 [2] Ch. 2 and 3 in Sharan 10 [3] Ch. 2 in HS 11 / Zheng-Liang Lu Java Programming 41 / 68 Example Given the radius
cis20.1 design and implementation of software applications I fall 2007 lecture # I.2 topics: introduction to java, part 1
topics: introduction to java, part 1 cis20.1 design and implementation of software applications I fall 2007 lecture # I.2 cis20.1-fall2007-sklar-leci.2 1 Java. Java is an object-oriented language: it is
Chapter 2: Basic Elements of C++
Chapter 2: Basic Elements of C++ Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates
CS 112 Introduction to Computing II. Wayne Snyder Computer Science Department Boston University
CS 112 Introduction to Computing II Wayne Snyder Department Boston University Today: Java basics: Compilation vs Interpretation Program structure Statements Values Variables Types Operators and Expressions
Chapter 2: Basic Elements of C++ Objectives. Objectives (cont d.) A C++ Program. Introduction
Chapter 2: Basic Elements of C++ C++ Programming: From Problem Analysis to Program Design, Fifth Edition 1 Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers
BLM2031 Structured Programming. Zeyneb KURT
BLM2031 Structured Programming Zeyneb KURT 1 Contact Contact info office : D-219 e-mail zeynebkurt@gmail.com, zeyneb@ce.yildiz.edu.tr When to contact e-mail first, take an appointment What to expect help
COMP 250: Java Programming I. Carlos G. Oliver, Jérôme Waldispühl January 17-18, 2018 Slides adapted from M. Blanchette
COMP 250: Java Programming I Carlos G. Oliver, Jérôme Waldispühl January 17-18, 2018 Slides adapted from M. Blanchette Variables and types [Downey Ch 2] Variable: temporary storage location in memory.