Difference between ‘IS-A’ and ‘HAS-A’ relationship in java?

IS-A RELATIONSHIP	HAS- A RELATIONSHIP
Is a relationship also known as inheritance	Has a relationship also known as composition or aggregation.
For IS-A relationship we uses extends keyword	For Has a relationship we use new keyword
Ex : Car is a vehicle.	Ex : Car has an engine. We cannot say Car is an engine
The main advantage of inheritance is reusability of code	The main advantage of has a relationship is reusability of code

IS-A VS HAS-A