If a class is declared abstract, it cannot be instantiated.

Java Programming Language Polymorphism in Java (Article) Polymorphism in Java (Program)

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Program:

 abstract class Human{
  abstract void mother();
}
class Woman extends Human{
	void mother(){
		System.out.println("I am Your Mother");
		}
	public static void main(String args[]){
	Human obj = new Human(); // wrong statement
	 Human obj1 = new Woman();
	 obj1.mother();
	}
}

Output:

Woman.java:9: error: Human is abstract; cannot be instantiated
	Human obj = new Human();
	            ^
1 error

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