Networking

Networking 

For adding networking functions we should import  java.net package

Logical or Physical link between one or more than  one device or system is called networking.

IP address

16 bit address used to identify each computer/system within network.

Host name

Host name is user defined name which wrap ip address.

Port Number

It is a 16 bit number in order to identify service or program provided by server.

Client

A program which uses the services provided by server.

Server

A program which provides services.

Thread using Runnable Interface

Creating Thread using Runnable Interface

The Runnable interface should be implemented by any class whose instances are intended to be executed as a thread.

The class must define run() method of no arguments.

The run() method is like main() for the new thread provides the means for a class to be active while not subclassing thread.

A thread that implements Runnable can run without sub classing thread by instantiating a thread instance and passing itself in as the target.

Program

class AThread implements Runnable
{
public void run()
{
for (int i=1;i<=10;i++)
System.out.println("Iam runnable");
}
}
class RunnableDemo
{
main(0
{
AThread a = new AThread();
Thread t1 = new Thread(a);
t1.start(0;
}
}

Hai Friends, Today we would learn regarding Inter Thread Process Communication

Inter Thread Process Communication

One Thread Communicate with another thread inorder to avoid dead locks.

1. wait

2. notify or notifyAll

1.wait

To call wait(), notify(), notifyAll() the current thread should be owner of the object.

* We can call these methods only from synchronized block.

* If we call these method from non synchronized block then compiler give IllegelMonitorStateException.

* After calling wait method, the thread releases lock and enter into waiting state.

* After giving the notification by notify() the thread not release the lock.

* The only case lock is released is wait method.

Today we are going to learn about how to use Synchronization in Multi Threading Through program

class Account
{
private float balance;
Account(float balance)
{
this.balance=balance;
}
void deposit (String name)
{
for(int i=1;i<=10; i++)
balance = balance +100;
System.out.println(name+" "+"Balance is" +balance);
}
}
class TransactionThread extends Thread
{
Account acc;
String name;
TranscationThread (Account acc, String name)
{
this.acc = acc;
this.name = name;
}
public void run(0
{
acc.deposit (name);
}
clas AccountSynch
{
main()
{
Account acc1 = new Account(5000f);
TransactionThread  t1= new TransactionThread
TransactionThread t2 =(101, "Rama");
TransactionThread t2=(acc, "Sita");
t1.start();
t2.start();

Today we are going to learn about Java. 

Core Java

Multi Threading:

Synchronization/Locking Mechanism

More than one thread shares the resources.

There are two types of Locks

1. Object Locking

2. Class Locking

* When more than one thread operates on same resources there is a chance of getting inaccurate results to overcome these methods of that class is defined as synchronized.

synchronized return type method-name(parameters)

{

statements;

}

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Good Morning Everybody

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