abstract class

Can we create object of abstract class in any ways ?

Not directly. But if you have a non-abstract class that extends your abstract class, you can create an object of that non-abstract class.

For example, consider this:

class AbstractDemo {
}

class NonAbstractDemo extends AbstractDemo {
}

You obviously canNOT instantiate AbstractDemo, but you CAN instantiate your non-abstract class:

AbstractDemo obj = new NonAbstractDemo();

What's the point of doing this? - you may ask. The answer is, if you had some (non-private) variables or methods in your AbstractDemo class, your NonAbstractDemo has inherited all of them!