What are abstract methods in java
An abstract method is the method which does’nt have any body.
Abstract method is declared with
keyword abstract and semicolon in place of method body.
public abstract void <method name>();
Ex : public abstract void getDetails();
It is the responsibility of subclass to provide implementation to
abstract method defined in abstract classis it necessary for abstract class to have abstract method
Abstract classes CAN have non-abstract methods.is it necessary for abstract class to have abstract method
No, abstract class can have zero abstract methods.Is it mandatory for an abstract class to have abstract methods?
No, abstract class can have zero abstract methods.write a program in which an abstract class is being defined containg an abstract method omputer(int a, int b) and a non abstract method as well
abstract class Sum{
public abstract int compute(int a, int b);
public void disp(){
System.out.println("Method of class Sum");
}
}
class Demo extends Sum{
public int compute(int a, int b){
return a+b;
}
public static void main(String args[]){
Sum obj = new Demo();
System.out.println(obj.compute(3, 7));
obj.disp();
}
}Can we add a non-abstract method into abstract class?
Yes, we can. An abstract class can have both abstract and non-abstract methodsCopyright © 2021 Codeinu
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