Why is it not allowed add toString() to interface as default method?
40468
Java8: Why is it forbidden to define a default method for a method from java.lang.Object
23973
Impossible to use ref and out for first ("this") parameter in Extension methods?
155217
Why is there no primitive type for String?
89755
Why is "throw null" not creating a compilation error in Java?
1439
Can't cast to to unspecific nested type with generics
24637
Why can't two methods be declared with the same signature even though their return types are different?
5245
When should I use an interface in java?
49317
The method format(String, Object[]) in the type String is not applicable for the arguments (...)
72740
Invoking methods with optional parameters through reflection
855
What does it mean to "program to an interface"?
141587
Is there any reason to declare optional parameters in an interface?
38390
Is there more to an interface than having the correct methods
82103
Explicit vs implicit call of toString
34170
Is it possible to use a primitive type (int) in as a generic type in Java?
83424
Explicitly calling a default method in Java
20655
How do I make the method return type generic?
85865
Optional Methods in Java Interface