Term Project - English Language 2 - Example of Term Project 2

8/12/2019 Term Project - English Language 2 - Example of Term Project 2

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Term ProjectSubject: English Language 4

Title: JAVA

2013/0035 Pera PericSupervisor: prof. MiloD.uri

Faculty of Electrical Engineering

University of Belgrade


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Introduc t ion to Java

What Is Java?

Getting Started With Java Programming

Create, Compile and Running a JavaApplication


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What Is Java?

History

Characteristics of Java


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History

James Gosling and Sun Microsystems

Oak

Java, May 20, 1995, Sun World

HotJava

The first Java-enabled Web browser

JDK Evolutions J2SE, J2ME, and J2EE (not mentioned in

the book, but could discuss here optionally)


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Character ist ics of Java

Java is simple Java is object-oriented

Java is distributed

Java is interpreted

Java is robust

Java is secure

Java is architecture-neutral

Java is portable

Javas performance

Java is multithreaded

Java is dynamic


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JDK Vers ions

JDK 1.02 (1995) JDK 1.1 (1996)

Java 2 SDK v 1.2 (a.k.a JDK 1.2, 1998)

Java 2 SDK v 1.3 (a.k.a JDK 1.3, 2000) Java 2 SDK v 1.4 (a.k.a JDK 1.4, 2002)


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JDK Edi tions

Java Standard Edition (J2SE) J2SE can be used to develop client-side standalone

applications or applets.

Java Enterprise Edition (J2EE) J2EE can be used to develop server-side applications

such as Java servlets and Java ServerPages.

Java Micro Edition (J2ME). J2ME can be used to develop applications for mobile

devices such as cell phones.


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Java IDE Too ls

Forte by Sun MicroSystems Borland JBuilder

Microsoft Visual J++

WebGain Caf

IBM Visual Age for Java


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Gett ing Star ted w ith Java Programm ing

A Simple Java Application

Compiling Programs

Executing Applications


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A Simp le Appl icat ion

Example 1.1//This application program prints Welcome

//to Java!package chapter1;

public class Welcome {public static void main(String[] args) {System.out.println("Welcome to Java!");

}

}


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Creat ing and Compi l ing Prog rams

On command line javac file.java

S o u r ce C o d e

C r e a t e / M o d i fy S o u r c e C o d e

C o m p i le S o u r c e C o d e

i .e . j a v a c W e l c o m e . ja v a

B t e co d e

R u n B y t eo d ei .e . j a va W e l c o m e

R e s u l t

I f c o m p i la t i o n e r r o r s

I f r u n t im e e r r o r s o r i n c o r r e c t r e s u l t


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Execut ing Appl icat ions

On command line java classname

JavaInterpreter

on Windows

JavaInterpreter

on Sun Solaris

JavaInterpreter

on Linux

Bytecode

...


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Example

javac Welcome.java

java Welcome

output:...


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Compi l ing and Running a Program

c:\exampl

chapter1 Welcome.class

Welcome.java

chapter2

.

.

Java source files and class files for Chapter 2

chapter19 Java source files and class files for Chapter 1

Welcome.java~


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Anatomy o f a Java Program

Comments Package

Reserved words

Modifiers

Statements

Blocks

Classes

Methods

The main method


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Comments

In Java, comments are preceded by two

slashes (//) in a line, or enclosed

between /* and */ in one or multiple

lines. When the compiler sees //, itignores all text after // in the same

line. When it sees /*, it scans for the

next */ and ignores any text between /*

and */.


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Reserved Words

Reserved wordsor keywordsare wordsthat have a specific meaning to thecompiler and cannot be used for other

purposes in the program. For example,when the compiler sees the word class,it understands that the word after classis the name for the class. Otherreserved words in Example 1.1 are

public, static, and void. Their use willbe introduced later in the book.


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Modi f iers

Java uses certain reserved words calledmodifiersthat specify the propertiesof the data, methods, and classes and

how they can be used. Examples ofmodifiers are public and static. Othermodifiers are private, final, abstract,and protected. A public datum, method,or class can be accessed by other

programs. A private datum or methodcannot be accessed by other programs.Modifiers are discussed in Chapter 6,"Objects and Classes."


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Statements

A statementrepresents an action or a

sequence of actions. The statement

System.out.println("Welcome to Java!") in

the program in Example 1.1 is a statement

to display the greeting "Welcome toJava!" Every statement in Java ends with

a semicolon (;).


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Blocks

A pair of braces in a program forms a

block that groups components of a

program.

public class Test {

public static void main(String[] args) {

System.out.println("Welcome to Java!");

}

}

Classbloc

Methodbloc


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Classes

The classis the essential Java construct.

A class is a template or blueprint for

objects. To program in Java, you must

understand classes and be able to writeand use them. The mystery of the class

will continue to be unveiled throughout

this book. For now, though, understand

that a program is defined by using one or

more classes.


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Methods

What is System.out.println? It is amethod: a collection of statements thatperforms a sequence of operations todisplay a message on the console. It can

be used even without fully understandingthe details of how it works. It is used byinvoking a statement with a stringargument. The string argument is enclosedwithin parentheses. In this case, the

argument is "Welcome to Java!" You cancall the same println method with adifferent argument to print a differentmessage.


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main Method

The main method provides the control ofprogram flow. The Java interpreterexecutes the application by invoking themain method.

The main method looks like this:

public static void main(String[] args) {

// Statements;

}


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Displaying Text in a Message Dialog

Box

you can use the showMessageDialog method in

the JOptionPane class. JOptionPane is one of

the many predefined classes in the Javasystem, which can be reused rather than

reinventing the wheel.


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The showMessageDialog Method

JOptionPane.showMessageDialog(null, "Welcometo Java!",

"Example 1.2",

JOptionPane.INFORMATION_MESSAGE));


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Thank you fo r your attent ion !

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Term Project - English Language 2 - Example of Term Project 2