what is is a relationship in java

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Enid
30 Mar 2016
1‘Has a ‘ relationship is also known as “composition or Aggregation”. 
2As in inheritance we have ‘extends’ keyword we don’t have any keyword to 
3implement ‘Has a’ relationship in java. The main advantage of ‘Has-A‘ 
4relationship in java code reusability. For has a relationship we use new keyword
5
6Ex: Car has an engine. We cannot say Car in an engine.
Kenan
06 Apr 2018
1‘is a’ relationship is also known as inheritance. We can implement 
2‘is a’ relationship or inheritance in java using extends keyword. 
3The advantage of inheritance or is a relationship is reusability of code 
4instead of duplicating the code.
5  
6Ex : 
7Motor cycle is a vehicle
8Car is a vehicle 
9Both, car and motorcycle extends vehicle.
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