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Association /aggregation/composition

 
Ranch Hand
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I am bit confused about the relation between association /aggregation/composition.

I can define the aggregation in following code. Please help me to define the other two.
Class A{
}
class B {
A a =new A();
}

Thanks in advance.
 
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Here you go dude ! Its c++ but its UML all the same.

UML concepts
 
author
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We're going to move this over to the intermediate forum - these topics aren't on the SCJP exam.
 
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