core java chp 1

7/29/2019 Core Java Chp 1

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Core Java Chapter 1

Presented by,

Soe Min Htut



Content•

Chapter 1 Hello Java• Chapter 2 Java Fundamental

• Chapter 3 Java OOP

• Chapter 4 GUI (AWT & SWING)

• Chapter 5 Generic and Data Collection• Chapter 6 Java Input and Output (IO)

• Chapter 7 Java Thread

•

Chapter 8 Java & Database (mysql)



Chapter (1) Hello Java

• Java – Pogramming language originally developed James

Gosling and released in 1995

• Java usage

– Open-source software – Write Once, Run Anywhere (Windows, Mac Os,

Solaris, Linux, other)

– Object model, platform independent, architectureneutral, simple, secure, portable, robust, multi-

threaded, distributed, dynamic



•

Java architecture




• JRE, JDK and JVM

– Java Runtime Environment (JRE): minimum requirement to run java

– Java Development Kit (JDK): provides all requires to compile andexecute java for developers

– Java Virtual Machine (JVM): is created when it downloads andruns JRE or JDK

• Windows system requirements for JDK and JRE

– Pentium 2.266 MHz processor, memory 128 MB,

disk space 94 MB (JRE) and 180 MB (JDK)

• Software requirements for our learning

– JDK, Mysql, Netbeans and Notepad++




• Configuration JDK to run java from command prompt – Uninstall older version of JDK/JRE: „Control Panel‟ Un-install programs

„Java SE Development Kit‟ and „Java SE Runtime‟

– Go to Java SE download @http://www.oracle.com/technetwork/java/javase/downloads/index.html.

– Click the „Download‟ button under „JDK‟ of „Java SE 7‟

– Choose your OS e.g: Windows x86 (32-bit) or Windows x64 (64-bit)

– By default, JDK will be installed into directory: „C:\Program Files\java\Jdk1.7.0‟

– „Control Panel‟ „System‟ „Advanced system settings‟

– „Advanced‟ tab „Environment Variables‟

– In „System Variables‟ box, scroll down to select „PATH‟ „Edit‟

– In „Variable value‟ field, insert „c:\Program Files\java\jdk1.7.0\ bin‟ followed by asemicolon (;)

– C:\> java – version, C:\> javac


http://www.oracle.com/technetwork/java/javase/downloads/index.html

http://www.oracle.com/technetwork/java/javase/downloads/index.html



• First hello java program – Java source file extension: FirstJava.java

class FirstJava {

public static void main (String[] args) {

System.out.println("Hello Java");

}}

C:\> javac FirstJava.java

– Java compiled sources (bytecode): FirstJava.class

C:\> java FirstJava




• Java class – Java class can be called as java program

• Java code block (braces) – It defines by curly brackets { }

• Java main method

– Methods describe the capabilities of the class. – Every method must be called from another method. The only

exception is main(), which is called by the OS.

– Methods can accept parameters.

public static void main (String args[]) { … }

•

Java is case sensitive




• Java dot operator: . – A.B ( A => B)

• Single line comment: //

•

Multiple lines comment: /* */• Three types of error

– (1) compile-time error

– (2) run-time error

– (3) logical error

AB




• Installation NetBeans – Download “ NetBeans IDE” installer from

http://netbeans.org/downloads/index.html

– Run the downloaded installer

•

Writing a java program in NetBeans – File menu New Project

– In “Choose Project” dialogue under Categories, Java chooseJava Application

– “Name and Location” In “Project Name”, enter “FirstJava”

• Compile & Execute – Right-click “Run File”




core java chp 1

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