Thursday, December 1, 2011

Different ways to create objects in java

1. Using new keyword
This is the most common way to create an object in java. 

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("ravi.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) object using classloader

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

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