Buddha Institute Of Technology, Gida, Gorakhpur

PRESENTATION ON ADVANCE JAVA

Dhananjay Prajapati (1452510903)Department of Computer science and Eng. 4th year

Email – dhananjayprajapati689@gmail.com

Content

1. Introduction2. Collection3. Multithreading4. Java - Networking5. AWT6. Swing7. JDBC8. JSP9. Applet

Introduction• Java programming language was originally developed by Sun Microsystems which was initiated by

James Gosling and released in 1995 as core component of Sun Microsystems' Java platform (Java 1.0 [J2SE]).

• The latest release of the Java Standard Edition is Java SE 8. With the advancement of Java and its widespread popularity, multiple configurations were built to suit various types of platforms. For example: J2EE for Enterprise Applications, J2ME for Mobile Applications.

• The new J2 versions were renamed as Java SE, Java EE, and Java ME respectively. Java is guaranteed to be Write Once, Run Anywhere.

• Java is −• Object Oriented − In Java, everything is an Object. Java can be easily extended since it is based on

the Object model.• Platform Independent − it is not compiled into platform specific machine, rather into platform

independent byte code. This byte code is distributed over the web and interpreted by the Virtual Machine (JVM) on whichever platform it is being run on.

• Simple − Java is designed to be easy to learn. If you understand the basic concept of OOP Java, it would be easy to master.

• Secure − With Java's secure feature it enables to develop virus-free, tamper-free systems. Authentication techniques are based on public-key encryption.

-----Next-------• Architecture-neutral − Java compiler generates an architecture-neutral object file format, which

makes the compiled code executable on many processors, with the presence of Java runtime system.

• Portable − Being architecture-neutral and having no implementation dependent aspects of the specification makes Java portable. Compiler in Java is written in ANSI C with a clean portability boundary, which is a POSIX subset.

• Robust − Java makes an effort to eliminate error prone situations by emphasizing mainly on compile time error checking and runtime checking.

• Multithreaded − With Java's multithreaded feature it is possible to write programs that can perform many tasks simultaneously. This design feature allows the developers to construct interactive applications that can run smoothly.

• Interpreted − Java byte code is translated on the fly to native machine instructions and is not stored anywhere. The development process is more rapid and analytical since the linking is an incremental and light-weight process.

• High Performance − With the use of Just-In-Time compilers, Java enables high performance.• Distributed − Java is designed for the distributed environment of the internet.• Dynamic − Java is considered to be more dynamic than C or C++ since it is designed to adapt to

an evolving environment. Java programs can carry extensive amount of run-time information that can be used to verify and resolve accesses to objects on run-time.

Collection• Collection framework provides a well designed set of

interface and classes for storing and manipulating groups of data as a signal unit a collection.

• It provides a standard programming interface to many of the most common abstractions, without blundering the programmer with to many procedure and interfaces.

• Collocation tree part-1. List-Array List2. Set- Tree set ,Hash set, Link hash set3. map- Hash Map, Hash Table, Tree Map

Multithreading

• Java is multithreaded programming language which means we can develop multithreaded program using java. A multithreaded program contains two or more parts that can ran concurrently and each part can handle different task at the same time making optimal use of the available resources specially when your computer has multiple CPU.

Life Cycle of a Thread

New

Terminated

Runnable

Timed Waiting

Waiting

Thread completesInterval expires

Await SleepAwait

lock

Unlock signal signal all

Java-NetworkingThe term Network programming refers to writing

programs that execute across multiple devices(Computers), In which the devices are all connected to each other using a networks.

The Java net package of the J2se API contains a collection of classes and interfaces that provide the low-level communication details, allowing you to write programs that focuses on solving problem at hand.

The java net package provides support for the two common network protocols.

Networks ProtocolsTCP- TCP stands for transmission control protocol, which

allows for reliable communication between two application. TCP is typically used over the Internet Protocol, which is referred to as TCP/IP.

UDP- UDP stands for User Datagram Protocol, a connection-less protocol that allows for packets of data to be transmitters between application.

Socket programming- This is most widely used concept in networking and it has been explained in very details.

URL Processing- This would be covered separately. Click here to learn about URL Processing in java language

AWT(Abstract windowing Toolkit) Java AWT (Abstract Windowing Toolkit) is an API to

develop GUI or window-based application in java. 1) AWT components are platform-dependent. 2) AWT components are heavyweight. 3)AWT doesn't support pluggable look and feel. 4) AWT provides less components than Swing. 5) AWT doesn't follows MVC(Model View Controller)

where model represents data, view represents presentation and controller acts as an interface between model and view.

Java AWT Hierarchy

AWT Program

• import java.awt.*;   • class First extends Frame• {   • First()• {   • Button b=new Button("click me");   • b.setBounds(30,100,80,30); // setting button position   • add(b); //adding button into frame   • setSize(300,300); //frame size 300 width and 300 height   • setLayout(null); //no layout manager   • setVisible(true); //now frame will be visible, by default not visible   • }   • public static void main(String args[]){   • First f=new First();   • }}  

SwingJava Swing is a part of Java Foundation Classes (JFC)

that is used to create window-based applications. It is built on the top of AWT (Abstract Windowing Toolkit) API and entirely written in java.

1) Java swing components are platform-independent. 2) Swing components are lightweight. 3) Swing supports pluggable look and feel.4) Swing provides more powerful components such as

tables, lists, scrollpanes, colorchooser, tabbedpane etc. 5) Swing follows MVC.

Swing API

Swing ProgramSimple Java Swing Exampleimport javax.swing.*;   public class FirstSwingExample {   public static void main(String[] args) {   JFrame f=new JFrame(); //creating instance of JFrame              JButton b=new JButton("click"); //creating instance of JButton   b.setBounds(130,100,100, 40); //x axis, y axis, width, height             f.add(b); //adding button in JFrame            f.setSize(400,500); //400 width and 500 height   f.setLayout(null); //using no layout managers   f.setVisible(true); //making the frame visible   }   }  

JDBC(Java Data Base Connectivity) Java Database Connectivity(JDBC) is an Application Programming

Interface(API) used to connect Java application with Database. JDBC is used to interact with various type of Database such as Oracle, MS Access, My SQL and SQL Server. JDBC can also be defined as the platform-independent interface between a relational database and Java programming. It allows java program to execute SQL statement and retrieve result from database.

Steps to connect a Java Application to Database The following 5 steps are the basic steps involve in connecting a Java application

with Database using JDBC.1. Register the Driver(Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); )2. Create a Connection (Connection con = DriverManager.getConnection

("jdbc:oracle:thin:@localhost:1521:XE","username","password");)3. Create SQL Statement- Statement s=con.createStatement(); 4. Execute SQL Statement- (ResultSet rs=s.executeQuery("select * from user");

while(rs.next()) { System.out.println(rs.getString(1)+" "+rs.getString(2)); } )5. Closing the connection- con.close();

JSP(Java Server Page)• Java Server Pages (JSP) is a server-side programming

technology that enables the creation of dynamic, platform-independent method for building Web-based applications. JSP have access to the entire family of Java APIs, including the JDBC API to access enterprise databases.

• The following are the paths followed by a JSP • Compilation • Initialization (public void jspInit(){ )• Execution (void _jspService(HttpServletRequest request, HttpServletResponse response) )• Cleanup (public void jspDestroy() )

Working

JSP Syntax

Syntax Purpose jsp:include Includes a file at the time the page is

requested jsp:useBean Finds or instantiates a JavaBean jsp:setProperty Sets the property of a JavaBean jsp:getProperty Inserts the property of a JavaBean intojsp:forward Forwards the requester to a new page jsp:plugin Generates browser-specific code that

makes an OBJECT or EMBED tag for the Java plugin jsp:element Defines XML elements dynamically.

AppletsApplet is a special type of program that is embedded in the

webpage to generate the dynamic content. It runs inside the browser and works at client side.

• Lifecycle of Java Applet1.public void init(): is used to initialized the Applet. It is invoked only

once.2.public void start(): is invoked after the init() method or browser is

maximized. It is used to start the Applet.3.public void stop(): is used to stop the Applet. It is invoked when

Applet is stop or browser is minimized.4.public void destroy(): is used to destroy the Applet. It is invoked

only once.

Program Applet• import java.applet.Applet; • import java.awt.Graphics; • public class First extends Applet• { • public void paint(Graphics g)• { • g.drawString("welcome",150,150); • } • } • Note: class must be public because its object is created by Java Plug in software that resides on

the browser.• myapplet.html• <html> • <body> • <applet code="First.class" width="300" height="300"> • </applet> • </body> • </html>