Professor: Alvin Chao 1. How many lines of code call the - PowerPoint PPT Presentation

Nov 09, 2022 •355 likes •431 views

Professor: Alvin Chao 1. How many lines of code call the System.out.println method? 2. How many times is println actually called when the program runs? 3. For each CALL in the program trace on the right, draw an arrow to the corresponding

Professor: Alvin Chao
1. How many lines of code call the System.out.println method? 2. How many times is println actually called when the program runs? 3. For each CALL in the program trace on the right, draw an arrow to the corresponding method call on the left. 4. What is the output of the program? Please write \n to show each newline. 5. In your own words, describe what methods are for. Why not just write everything in main? 6. What is the difference between a method and a variable? What do they have in common? 7. When Java sees a name like x, count, or newLine, how can it tell whether it's a variable or a method? (Hint: syntax)
1. How many method call statements are in this program? 2. In what order are the methods declared in the class? 3. Based on Model 1, describe the order in which methods actually run. What does that order have to do with your answer to #2? 4. What is the output of the program? Be precise about where there are spaces and where there are newlines.
• Acknowledgements Parts of this activity are based on materials developed by Chris Mayfield and Nathan Sprague. </end>

Recommend

Section 0006 Instructor: Alvin Chao Professor: Alvin Chao Anatomy of a Java Program: Comments l

Welcome to CS 149 Section 0006 Instructor: Alvin Chao Professor: Alvin Chao Anatomy of a Java Program: Comments l Javadoc comments: /** l * Application that converts inches to centimeters. * l * @author Chris Mayfield l * @version

221 views • 21 slides

Professor: Alvin Chao In mathematics, the factorial of a non-negative integer n , denoted by n

Professor: Alvin Chao In mathematics, the factorial of a non-negative integer n , denoted by n !, is the product of all positive integers less than or equal to n . For example, 5! = 5 4 3 2 1 = 120. Source:

235 views • 8 slides

CS 240 Fall 2015 Section 004 Alvin Chao, Professor Today Course overview Data

CS 240 Fall 2015 Section 004 Alvin Chao, Professor Today Course overview Data Structures / Algorithms Course policies The C language Motivation Computers are digital Data is stored in binary format (1's and 0's)

557 views • 29 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) The real power

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) The real power of arrays is the ability to process them using loops, i.e., performing the same task for multiple elements. The standard form of iteration is as

584 views • 30 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) When does

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) When does Java allow you to assign one type of primitive to another? byte miles; checking = 56000; short minutes; total = 0; int checking; sum = total;

118 views • 11 slides

Professor: Alvin Chao CS149 Intro to Classes and Objects When you define a class in Java,

Professor: Alvin Chao CS149 Intro to Classes and Objects When you define a class in Java, you are defining a new reference type. For example, the class below represents Die objects. Each object has its own attributes (data) and methods

843 views • 9 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) The primitive

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) The primitive data type boolean has two values: true and false . Boolean expressions are built using relational operators and conditional operators . An

316 views • 15 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) Reminder:

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) Reminder: if-statements if (BooleanExpression) { true Boolean Statement(s) Expression Statement(s) } false While Loops while (BooleanExpression) {

561 views • 14 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) A reference

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) A reference is a variable that refers so something else and can be used as an alias for that something else. You have already used a reference (Scanner and

345 views • 8 slides

Professor: Alvin Chao CS149 Array Activities int[ ] nums = {10, 3, 7, -5}; nums 10 3

Professor: Alvin Chao CS149 Array Activities int[ ] nums = {10, 3, 7, -5}; nums 10 3 7 -5 Draw a memory diagram for the following array declarations: int[] sizes = new int[5]; sizes[2] = 7; char[] codes = new char[3];

125 views • 10 slides

Professor: Alvin Chao CS149 Arrays of Objects Classes generally include the following kinds

Professor: Alvin Chao CS149 Arrays of Objects Classes generally include the following kinds of methods (in addition to others): constructor methods that initialize new objects accessor methods (getters) that return attributes

305 views • 8 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) 1. Identify one

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) 1. Identify one static variable from the Circle class. a) What is the name and purpose of the variable? b) What is the scope of the variable? c)

457 views • 8 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) 1. Java programs

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) 1. Java programs are organized into classes, each of which has one or more methods, each of which has one or more statements. Writing methods allows you to break

331 views • 8 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) Loops and Scope

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) Loops and Scope l Reminder the scope of a variable is the part of the program where that variable is visible l Will this compile? while (number < 10) {

307 views • 19 slides

Professor: Alvin Chao 1. Which numbers % 4 evaluate to 0 in the table above? If the table were

Professor: Alvin Chao 1. Which numbers % 4 evaluate to 0 in the table above? If the table were extended to include more rows, which other numbers % 4 would evaluate to 0? 2. Look at the expressions in the second table that evaluate to 1. How do

190 views • 8 slides

Professor: Alvin Chao The primitive data type boolean has two values: true and false . Boolean

Professor: Alvin Chao The primitive data type boolean has two values: true and false . Boolean expressions are built using relational operators and conditional operators . An expression that evaluates to true or false Examples: X < 7

300 views • 7 slides

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) Counting on a

Professor: Kevin Molloy (adapted from slides originally developed by Alvin Chao) Counting on a Line: x+a moves you a units to the right of x xb moves you b units to the left of x Counting on a Circle (x+a) moves you a units

340 views • 15 slides

Welcome HOUSEKEEPING Call to order Roll Call All lines will be muted during the

Marketing, Outreach & Enrollment Assistance Advisory Group Welcome HOUSEKEEPING Call to order Roll Call All lines will be muted during the meeting Teleconference line for public comments is: 1-800-230-1085 There is

892 views • 71 slides

Functions Functions A set of statements (lines of code) that can be run repeatedly

Functions Functions A set of statements (lines of code) that can be run repeatedly Goals: Learning Python by Lutz and Ascher Code reuse Procedural decomposition Top-Down Design Break problem into subproblems Print HIHO

451 views • 20 slides

Code Code Code on the Presentation of Persons with Disabilities in the Media What you call us

Code Code Code on the Presentation of Persons with Disabilities in the Media What you call us IS HOW YOU SEE US This publication is funded by SIDA, the Swedish International Development Cooperation Agency, through MyRight- Empowers People

343 views • 20 slides

Functions A set of statements (lines of code) that can be run repeatedly Functions

Functions A set of statements (lines of code) that can be run repeatedly Functions Goals: Learning Python by Lutz and Ascher Code reuse Procedural decomposition def printH(): Top-Down Design print "* *" print

172 views • 4 slides

ss 4 Cl Class CSC 472/583 Software Security System Call, Shellcode Dr. Si Chen

ss 4 Cl Class CSC 472/583 Software Security System Call, Shellcode Dr. Si Chen (schen@wcupa.edu) System Call Page 2 System Call User code can be arbitrary User code cannot modify kernel memory The call mechanism switches code to

840 views • 17 slides

Parallel lines They are lines whose distance between then does not change along their

D AY 4 P ARALLEL LINES I NTRODUCTION We see electric cables hanging between poles, athletic track lines and so many other similar features. Have we ever asked ourselves about a special feature about the lines that are identified with these

348 views • 12 slides

Why arent Gathering Lines Regulated and in One Call Bill Kiger President & Executive

Why arent Gathering Lines Regulated and in One Call Bill Kiger President & Executive Director Pennsylvania 811 Why Non-Regulated Gathering Lines? Class 1 Areas (10 or fewer structures per pipeline mile) Not federally regulated.

195 views • 16 slides