[Java] Covariant Return type

 Covariant Return type

- The covariant return type specifies that the return type may vary in the same direction as the subclass

- Since Java5, it is possible to override method by changing the return type if subclass overrides and method whose return type is Non-primitive

1. Example

package forLogic; class A{ A get(){ return this; } } public class Test extends A{ Test get(){ return this; } void message(){ System.out.print("covariant"); } public static void main(String[]args){ new Test().get().message(); } }

- The return type of the get() of A class is A, but the return type of the get() of Test class is Test

- Both methods have different return type but it is overriding