CODEWITHSUNDEEP
javalambdajava-8
Prerak Tiwari
Prerak Tiwari

Reputation: 3466

Compilation error while testing BiConsumer

I have written below method which accept BiConsumer<Object, Object>, when I pass the method reference of method testBiConsumer(String a, String b) I am getting a compilation error stating:

Multiple markers at this line
    - The method biConsumerTest(String, String, BiConsumer<Object,Object>) in the type Test is not applicable for the arguments (String, String, 
     Test::testBiConsumer)
    - The type Test does not define testBiConsumer(Object, Object) that is applicable here

If I change BiConsumer from BiConsumer<Object, Object> to BiConsumer<String , String > it works just fine.

How do I make below code work? I want public static void biConsumerTest(String a, String b, BiConsumer<String, String> biConsumer) to be generic.

public class Test {
        public static void main(String[] args){
            Test.biConsumerTest("A", "B", Test::testBiConsumer);
        }

        public static void biConsumerTest(String a, String b, BiConsumer<Object, Object> biConsumer){
            biConsumer.accept(a, b);
        }

        public static void testBiConsumer(String a, String b) {
            System.out.println(a);
            System.out.println(b);
        }
    }

Upvotes: 2

Views: 227

Answers (1)

Eugene
Eugene

Reputation: 120858

The code looks a bit funny and unclear what you actually what to achieve, but to make it generic:

public class Test {
    public static void main(String[] args) {
        Test.biConsumerTest("A", "B", Test::testBiConsumer);
    }

    public static <T> void biConsumerTest(T a, T b, BiConsumer<T, T> biConsumer) {
        biConsumer.accept(a, b);
    }

    public static <S> void testBiConsumer(S a, S b) {
        System.out.println(a);
        System.out.println(b);
    }
}

Upvotes: 3

Related Questions