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Chương trình đúng hay sai ?interface A {public void aMethod();}class B implements A{@Overridepublic void aMethod() {}}class C extends B implements A{}

Question

Chương trình đúng hay sai ?interface A {public void aMethod();}class B implements A{@Overridepublic void aMethod() {}}class C extends B implements A{}

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Solution

Chương trình là đúng.

Lớp B đã triển khai phương thức aMethod() từ giao diện A. Lớp C kế thừa từ lớp B và triển khai giao diện A, nhưng không cần phải triển khai lại phương thức aMethod() vì lớp B đã làm điều đó.

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