The document provides an overview of advanced Java programming concepts including: - Data structures like enumeration, bitset, vector, stack, dictionary and hashtable. - Collections framework designed around standard interfaces like LinkedList, HashSet and TreeSet. - Generics allowing generic methods to work with different data types. - Serialization and deserialization of objects to bytes for storage and recreation. - Networking using sockets for reliable TCP communication between applications. - Sending emails programmatically using JavaMail API and Java Activation Framework. - Multithreading for efficient programs that minimize idle CPU time. - Differences between applets and applications in how they are invoked and embedded. - Documentation comments for embedding program

1. Hewlett Packard
Enterprise
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2. Hewlett Packard Introduction
 OurTraining Programs ?
 WhyThey Are Important?
 Digital marketing process
 Overview of all module of digital marketing
 How to make money online with digital
marketing ?
2
Agenda for today’s
session

3. Founded in 2015, Hewlett Packard is an
American multinational enterprise
information technology company based in
Palo Alto, California.
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What is Hewlett Packard Enterprise?
HEWLETT
PACKARD

4. Objective of training
To make you an expert in
marketing any business, product
or service online by providing in-
depth knowledge along with
practical exposure.
To make money as part time or
full time freelancer in digital
marketing.
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5. Learn Advanced Java Programming
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6. Index
1. Data Structures
2. Collections
3. Generics
4. Serialization
5. Networking
6. Sending Email
7. Multithreading
8. Applet Basics
9. Documentation
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7. 1. Data Structures
• The data structures provided by the Java utility package are very
powerful and perform a wide range of functions.
• Enumeration
• BitSet
• Vector
• Stack
• Dictionary
• Hashtable
• Properties
• All these classes are now legacy and Java-2 has introduced a new
framework called Collections Framework.
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8. 2. Collections Framework
The collections framework was designed to meet several goals.
• The framework had to be high-performance. The implementations for
the fundamental collections (dynamic arrays, linked lists, trees, and
hashtables) are highly efficient.
• The framework had to allow different types of collections to work in a
similar manner and with a high degree of interoperability.
• Extending and/or adapting a collection had to be easy.
Towards this end, the entire collections framework is designed around
a set of standard interfaces. Several standard implementations such
as LinkedList, HashSet, and TreeSet, of these interfaces are provided
that you may use as-is and you may also implement your own
collection, if you choose.
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9. 3. Generics
Generic Methods:
• You can write a single generic method declaration that can be called
with arguments of different types. Based on the types of the
arguments passed to the generic method, the compiler handles
each method call appropriately. Following are the rules to define
Generic Methods:
• All generic method declarations have a type parameter
section delimited by angle brackets (< and >) that precedes
the method's return type ( < E > in the next example).
• Each type parameter section contains one or more type
parameters separated by commas.
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10. 4. Serialization
• Java provides a mechanism, called object serialization where an
object can be represented as a sequence of bytes that includes the
object's data as well as information about the object's type and the
types of data stored in the object.
• After a serialized object has been written into a file, it can be read
from the file and desterilized that is, the type information and bytes
that represent the object and its data can be used to recreate the
object in memory.
• Classes ObjectInputStream and ObjectOutputStream are high-level
streams that contain the methods for serializing and desterilizing an
object.
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11. 5. Networking (Socket Programming)
• The 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 network.
• The java.net package of the J2SE APIs contains a collection of classes
and interfaces that provide the low-level communication details,
allowing you to write programs that focus on solving the problem at
hand.
The java.net package provides support for the two common network
protocols:
TCP: TCP stands for Transmission Control Protocol, which allows for
reliable communication between two applications. TCP is typically
used over the Internet Protocol, which is referred to as TCP/IP.
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12. The following steps occur when establishing a TCP connection
between two computers using sockets:
• The server instantiates a ServerSocket object, denoting which port
number communication is to occur on.
• The server invokes the accept() method of the ServerSocket class.
This method waits until a client connects to the server on the given
port.
• After the server is waiting, a client instantiates a Socket object,
specifying the server name and port number to connect to.
• The constructor of the Socket class attempts to connect the client to
the specified server and port number. If communication is
established, the client now has a Socket object capable of
communicating with the server.
• On the server side, the accept() method returns a reference to a new
socket on the server that is connected to the client's socket.
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13. 6. Sending Email
• To send an e-mail using your Java Application is simple enough but to
start with you should haveJavaMail API and Java Activation
Framework (JAF) installed on your machine.
– You can download latest version of JavaMail (Version 1.2) from
Java's standard website.
– You can download latest version of JAF (Version 1.1.1) from Java's
standard website.
• Download and unzip these files, in the newly created top level
directories you will find a number of jar files for both the
applications. You need to add mail.jar and activation.jar files in your
CLASSPATH.
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14. 7. Multithreading
• Java provides built-in support for multithreaded programming. A
multithreaded program contains two or more parts that can run
concurrently. Each part of such a program is called a thread, and each
thread defines a separate path of execution.
• A multithreading is a specialized form of multitasking. Multithreading
requires less overhead than multitasking processing.
• I need to define another term related to threads: process: A process
consists of the memory space allocated by the operating system that
can contain one or more threads. A thread cannot exist on its own; it
must be a part of a process.
• Multithreading enables you to write very efficient programs that
make maximum use of the CPU, because idle time can be kept to a
minimum.
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15. 8. Applet Basics
There are some important differences between an applet and a
standalone Java application, including the following:
• An applet is a Java class that extends the java.applet.Applet class.
• A main() method is not invoked on an applet, and an applet class will
not define main().
• Applets are designed to be embedded within an HTML page.
• When a user views an HTML page that contains an applet, the code
for the applet is downloaded to the user's machine.
• A JVM is required to view an applet. The JVM can be either a plug-in
of the Web browser or a separate runtime environment.
• The JVM on the user's machine creates an instance of the applet
class and invokes various methods during the applet's lifetime.
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16. 9. Documentation Comments
• Java supports three types of comments. The first two are the // and
the /* */. The third type is called a documentation comment. It
begins with the character sequence /** and it ends with */.
• Documentation comments allow you to embed information about
your program into the program itself. You can then use the javadoc
utility program to extract the information and put it into an HTML file.
Documentation Comment:
• After the beginning /**, the first line or lines become the main
description of your class, variable, or method.
• After that, you can include one or more of the various @ tags. Each @
tag must start at the beginning of a new line or follow an asterisk (*)
that is at the start of a line.
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17. 17
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