Question

Define an abstract class

Name Java class that implements interface Comparable

Answer 1

Abstract class

An abstract class in java is one which is usually used as a parent class.
We cannot instantiate an abstract class (We cannot create object of that class).
An abstract class may or may not have abstract method. An abstract method is one which is declared in abstract parent class and implemented in child classes (classes which extend abstract class).
We can extend abstract class by creating child classes & can access its attributes & behaviors using child classes.

Example:
Below is a java program which represents an abstract class and a child class.

Name Java class that implements interface Comparable   

// Name class which implements Comparable interface

public class Name implements Comparable{
  
@Override
public int compareTo(Object o) {
return 0;
}
}

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