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618edited Jan 4, 2022 at 14:47For two objects, Foo and Bar the relationships can be defined
Association - I have a relationship with an object. Foo uses Bar
public class Foo {private Bar bar;};NB: See Fowler's definition - the key is that Bar is semantically related to Foo rather than just a dependency (like an int or string).
Composition - I own an object and I am responsible for its lifetime. When Foo dies, so does Bar
public class Foo {private Bar bar = new Bar();}Aggregation - I have an object which I've borrowed from someone else. When Foo dies, Bar may live on.
Content Under CC-BY-SA license What is the difference between association, …
WEBMay 20, 2009 · For two objects, Foo and Bar the relationships can be defined Association - I have a relationship with an object.Foo uses Bar. public class Foo { private Bar bar; }; NB: See Fowler's definition - the …
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Association, Composition and Aggregation in Java - GeeksforGeeks
- Dependency:Aggregation implies a relationship where the child can exist independentlyof the parent. For example, Bank and Employee, delete the Bank and the Employee still exist. whereas Composition...
- Type of Relationship:Aggregation represents “has-a” relationship whereas, Composition represents “part-of”relationship.
- Dependency:Aggregation implies a relationship where the child can exist independentlyof the parent. For example, Bank and Employee, delete the Bank and the Employee still exist. whereas Composition...
- Type of Relationship:Aggregation represents “has-a” relationship whereas, Composition represents “part-of”relationship.
- Type of association: Composition is a strongAssociation whereas, Aggregation is a weakAssociation.
- Estimated Reading Time: 4 mins
- Published: Mar 24, 2017
- Question & Answer
UML Association vs Aggregation vs Composition
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