java is a vs has a code example

Example 1: What is IS-A relationship in java

‘is a’ relationship is also known as inheritance. We can implement 
‘is a’ relationship or inheritance in java using extends keyword. 
The advantage of inheritance or is a relationship is reusability of code 
instead of duplicating the code.
  
Ex : 
Motor cycle is a vehicle
Car is a vehicle 
Both, car and motorcycle extends vehicle.

Example 2: is a relationsiop in java

public class Actress extends Person {        public String readScript(String movie) {        return "Reading the script of " + movie;    }         // additional methods/constructors}