instantiate an Abstract class in Java?

[joyadelfin]

Hello Dear,

Please Tell Me Is it possible to instantiate an Abstract class in Java?

[dennis123]

Abstract classes cannot be instantiated, but they can be subclassed. When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class. However, if it does not, then the subclass must also be declared abstract

[dennis123]

abstract class my {
public void mymethod() {
System.out.print("Abstract");
}
}

class poly {
public static void main(String a[]) {
my m = new my() {};
m.mymethod();
}
}
for your kind of information

[Sherin]

An abstract class is a class that is declared abstract—it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.
An abstract method is a method that is declared without an implementation (without braces, and followed by a semicolon), like this:


abstract void moveTo(double deltaX, double deltaY);
If a class includes abstract methods, then the class itself must be declared abstract, as in:

public abstract class GraphicObject {
abstract void draw();
}
When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class. However, if it does not, then the subclass must also be declared abstract.


Example::


abstract class Vehicle {
public abstract void runMotor();
}

class SUV extends Vehicle {
public void runMotor() {
System.out.println( this.getClass().getName() + ": Need more gas");
}
}

class Hybrid extends Vehicle {
public void runMotor() {
System.out.println( this.getClass().getName() + ": Woohoo, let's go!");
}
}

public class LetsGoForARide {
public static void main( String[] args ) {
Vehicle[] vehicles = new Vehicle[2];
vehicles[0] = new SUV();
vehicles[1] = new Hybrid();
for( int i = 0; i < vehicles.length; ++i ) {
vehicles[i].runMotor();
}
}
}