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Home/ Questions/Q 709869
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Editorial Team
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Editorial Team
Asked: May 14, 20262026-05-14T04:33:06+00:00 2026-05-14T04:33:06+00:00

if I inject a recursive dependency through a constructor, then it gives me an

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if I inject a recursive dependency through a constructor, then it gives me an exception, while if I use setter it doesn’t. Why is this?

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  1. Editorial Team
    Editorial Team
    2026-05-14T04:33:06+00:00Added an answer on May 14, 2026 at 4:33 am

    Do you mean that A has a B, and B has an A, and you’re trying to inject them both into each other? Logically, the behavior you describe makes sense.

    A a = new A()
    B b = new B()
    a.setB( b )
    b.setA( a )
    

    looks fine, but what should this look like?

    A a = new A( b )
    B b = new B( a )
    

    No matter how you rewrite the second group, you can’t create an A that depends on B by use of constructor.

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