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2.4 Jb0115: java oop: first program

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The purpose of this module is to present the first complete Java program of the collection that previews the most common forms of the three pillars of procedural programming: sequence, selection, and loop. The program also previews calling a method, passing a parameter to the method, and receiving a returned value from the method.

Revised: Sun Mar 27 18:57:37 CDT 2016

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Table of contents

Preface

The purpose of this module is to present the first complete Java program of the collection that previews the most commonforms of the three pillars of procedural programming:

  • sequence
  • selection
  • loop

The program also illustrates

  • calling a method,
  • passing a parameter to the method, and
  • receiving a returned value from the method.

As mentioned above, this is simply a preview. Detailed discussions of these topics will be presented in future modules.

Viewing tip

I recommend that you open another copy of this module in a separate browser window and use the following links to easily find and view the Figuresand Listings while you are reading about them.

Figures

Listings

Discussion

Instructions for compiling and running the program

Assuming that the Java Development Kit (JDK) is properly installed on your computer (see Jb0110: Java OOP: Programming Fundamentals, Getting Started ), do the following to compile and run this program.

1. Copy the text from Listing 1 into a text file named FirstProgram.java and store the file in a folder on your disk.

2. Open a command-line window in the folder containing the file.

3. Type the following command at the prompt to compile the program:

javac FirstProgram.java

4. Type the following command at the prompt to run the program:

java FirstProgram

Comments

Any text in the program code that begins with // is a comment. The compiler will ignore everything from the // to the end of the line.

Comments were inserted into the program code to explain the code.

The compiler also ignores blank lines.

Note that this program was designed to illustrate the concepts while being as non-cryptic as possible.

Program output

The program should display the text shown in Figure 1 on the screen except that the time will be different each timeyou run the program.

Figure 1 . Program output.
value in = 5 Odd time = 1353849164875countA = 0 countA = 1countA = 2 countB = 0countB = 1 countB = 2value out = 10

Run the program

I encourage you to copy the code from Listing 1 . Compile the code and execute it. Experiment with the code,making changes, and observing the results of your changes. Make certain that you can explain why your changes behave as they do.

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Jb0115: Java OOP: First Program
  • File: Jb0115.htm
  • Published: 11/25/12

Questions & Answers

differentiate between demand and supply giving examples
Lambiv Reply
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Lambiv
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Lambiv
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appreciation
Eliyee
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Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
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Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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Shukri
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Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
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Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
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Jabir
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In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
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Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
types of unemployment
Yomi Reply
What is the difference between perfect competition and monopolistic competition?
Mohammed
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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