What are all the methods used for Inter Thread communication and what is the class in which these methods are defined?

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maneesh.ce.2007  

 Profile Answers by maneesh.ce.2007 Questions by maneesh.ce.2007

• Member Since Nov-2008 | Dec 15th, 2008

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There are three ways in which Threads communicate with each other :

wait: It tells the calling thread to give up the monitor until some other thread enters the same monitor an calls Notify or Notifyall...

notify: It wakes up the first thread that called Wait() on the same object...

NotifyAll: It allows all the threads that called Wait() on the same object.The thread having the highest priority will run first...

chakry

• Nov 5th, 2011

Why we use 'wait()' inside a synchronized method

kutiarul

 Profile Answers by kutiarul Questions by kutiarul

• Nov 21st, 2009

Three methods are used. They are1. wait() - makes one thread wait for some time till another thread is being executed2. notify() - makes one wait process into ready state process3. notifyall() - makes all the waiting processes into ready state processes

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In how many ways we can create an object? Explain with example.

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vishrutha  

 Profile Answers by vishrutha Questions by vishrutha

• Member Since Feb-2009 | Feb 13th, 2009

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1. Using new keyword
This is the most common way to create an object in java. I read somewhere that almost 99% of objects are created in this way.

MyObject object = new MyObject();

2. Using Class.forName()
If we know the name of the class & if it has a public default constructor we can create an object in this way.

MyObject object = (MyObject) Class.forName("subin.rnd.MyObject").newInstance();

3. Using clone()
The clone() can be used to create a copy of an existing object.

MyObject anotherObject = new MyObject();
MyObject object = anotherObject.clone();

4. Using object deserialization
Object deserialization is nothing but creating an object from its serialized form.

ObjectInputStream inStream = new ObjectInputStream(anInputStream );
MyObject object = (MyObject) inStream.readObject();

5. Using class loader
one more is through creation of object using classloader like

this.getClass().getClassLoader().loadClass(”com.amar.myobject”).newInstance();

Now you know how to create an object. But its advised to create objects only when it is necessary to do so.

sampra

 Profile Answers by sampra Questions by sampra

• Mar 13th, 2012

There are 5 ways:
1-> new operaotor
2-> Class.forName()
3-> Cloning
4-> Deserialization
5-> Class.newInstance()

Max

• Sep 7th, 2011

All sorts of syntax sugar can also be named: 6. New String as a result of concatenation: String varName = getClass().getName(); //to avoid compile-time optimization String a = "Prefix" + varName; ...

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