Bài giảng điện tử môn tin học: Fundamentals of Programming pptx

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
Chapter 1: Introduction to Java

Chapter 2: Primitive Data Types and
Operations

Chapter 3: Control Statements

Chapter 4: Methods

Chapter 5: Arrays
Part I: Fundamentals of
Programming
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Chapter 1:
Introduction to Java

What Is Java?

Getting Started With Java Programming

Create, Compile and Running a Java
Application
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What Is Java?

History

Applications of Java

Compare to C/C++/C#

Characteristics of Java
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History

James Gosling and Sun Microsystems
(1983-1984)

Oak

In a project of electric device
developing

Java, May 20, 1995, Sun World

HotJava

The first Java-enabled Web browser

JDK Evolutions


J2SE, J2ME, and J2EE
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JDK Versions

JDK 1.0 (1995)

JDK 1.1 (1996)

Java 2 SDK v 1.2 (JDK 1.2, 1998)

Java 2 SDK v 1.3 (JDK 1.3, 2000)

Java 2 SDK v 1.4 (JDK 1.4, 2002)

Java 5 SDK v 1.5 (JDK 1.5, 2005)
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JDK Editions

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.
JDK Editions (2)
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Java2
Standard Edition
(J2SE™)
Java2
Enterprise Edition
(J2EE™)
Java2
Micro Edition
(J2ME™)
Java 2 Platform
Standard desktop &
workstation applications
Heavy duty server
systems
Small & memory
constrained devices
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Java IDE Tools


Eclipse

Borland Jbuilder

NetBean

Microsoft Visual J++, J#

WebGain Café

IBM Visual Age for Java

Forte by Sun Microsystems
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Applications of Java
JAVA
Mobile
Mobile
Console
Console
GUI
GUI
Network
Network
Web
Web
Database

Database
RMI
RMI
Applet
Applet
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Console
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GUI (with JFC)
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Applet & Web
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Database & Web
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Mobile
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Compare to C/C++/C#


Similar to C/C++/C#

Difference:

Compiler
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Traditional Compiler (C/C++)
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Java Compiler
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Characteristics of Java

Java is simple

Java is object-oriented

Java is distributed

Java is robust

Java is secure

Java is architecture-neutral


Java is multithreaded

Java is dynamic
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Getting Started with Java
Programming

A Simple Java Application

Compiling Programs

Executing Applications
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A Simple Application
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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Creating and Compiling Programs

On command line

javac file.java


Source Code
Create/Modify Source Code
Compile Source Code
i.e. javac Welcome.java
Bytecode
Run Byteode
i.e. java Welcome
Result
If compilation errors
If runtime errors or incorrect result
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Executing Applications

On command line

java classname
Java
Interpreter
on Windows
Java

Interpreter
on Sun Solaris
Java
Interpreter
on Linux
Bytecode

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Example
javac Welcome.java
java Welcome
output:
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Compiling and Running a Program
 Where are the
files stored in the
directory?

c:\example
chapter1
Welcome.class
Welcome.java
chapter2

.
.

.

Java source files and class files for Chapter 2

chapter19

Java source files and class files for Chapter 19

Welcome.java~
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Anatomy of a Java Program

Comments

Package

Reserved words

Modifiers

Statements

Blocks

Classes

Methods


The main method

Input processing